JP3528737B2 - Surface mounted antenna, method of adjusting the same, and communication device having surface mounted antenna - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-mounted antenna incorporated in a communication device such as a mobile phone, a frequency adjusting method thereof, and a communication device equipped with the surface-mounted antenna.

[0002]

2. Description of the Related Art In recent years, as a surface-mounted antenna incorporated in a communication device such as a portable telephone, one element can transmit and receive signals (radio waves) in different frequency bands from the viewpoint of downsizing of the communication device. What is possible is required. In order to meet the demand, the inventor of the present invention supports multi-band.
A multi-resonance type surface mount antenna is proposed. The proposed multi-band compatible, multi-resonance type surface mount antenna comprises a dielectric substrate on which a feeding radiation electrode and a parasitic radiation electrode are arranged with a space therebetween. The parasitic radiation electrode is designed to have multiple resonances with one or both of the fundamental-mode resonance wave (fundamental wave) and the higher-order mode resonance wave (harmonic wave) of the feeding radiation electrode.

In this specification, among a plurality of set resonance modes, one having the lowest resonance frequency is referred to as a fundamental mode, and one having a higher resonance frequency is referred to as a higher order mode. Says. Further, among the higher-order modes, the modes having the lowest resonance frequencies may be referred to as the second-order mode and the third-order mode.

The width of the frequency band for signal transmission / reception in the fundamental mode or higher order mode may be narrower than the required band width only by forming the feeding radiation electrode on the surface of the dielectric substrate. In the surface mount antenna, not only the feeding radiation electrode but also the non-feeding radiation electrode is provided to create a multiple resonance state in the fundamental mode or the higher order modes, thereby widening the frequency band.

[0005]

By the way, in such a proposed multi-band compatible and multi-resonance type surface mount antenna, the fundamental mode resonance frequency and the higher order mode resonance frequency of the feeding radiation electrode, The resonance frequency of the multi-resonance mode of the parasitic radiation electrode may deviate from the set frequency due to processing accuracy. In such a case, for example, it is desirable to partially cut (trim) the feeding radiation electrode or the non-feeding radiation electrode and perform frequency adjustment to match the deviated resonance frequency with the set frequency.

However, the frequency adjustment method for the proposed multi-band compatible / multi-resonance type surface mount antenna as described above has not been established, and frequency adjustment is performed using the conventional surface mount antenna frequency adjustment method. If this is done, the following problems may occur.

The problem is that, for example, when the deviation of the resonance frequency of the fundamental mode is corrected by partially cutting the feeding radiation electrode, the resonance frequency of the fundamental mode can be made to match the set frequency. However, there is a problem that the resonance frequency of the higher-order mode of the feeding radiation electrode deviates from the set frequency due to the above cutting, and the resonance frequency of the fundamental mode of the feeding radiation electrode, the resonance frequency of the higher-order mode, and the parasitic radiation It has been difficult to accurately match all the resonance frequencies of the above-described double resonance mode of the electrode with the set frequency.

The present invention has been made to solve the above problems, and an object of the present invention is to propose a frequency adjustment method suitable for a multi-band compatible multi-resonance type surface mount antenna, and to easily perform the frequency adjustment. Another object of the present invention is to provide a surface-mounted antenna that can be efficiently performed, a frequency adjustment method thereof, and a communication device including the surface-mounted antenna.

[0009]

In order to achieve the above object, the present invention has the following constitution as means for solving the above problems. That is, in the frequency adjusting method for a surface mount antenna according to the first aspect of the present invention, a feeding radiation electrode and a parasitic radiation electrode are arranged adjacent to each other on a surface of a dielectric substrate with a gap, and the parasitic radiation electrode is the feeding radiation. Basic electrode model
Mode and at least one of the higher modes
A method for adjusting a frequency of a surface-mounted antenna having a structure that causes multiple resonance with a vibration wave, wherein the feeding radiation electrode has an inductance component or the like along a current path of the feeding radiation electrode.
Form a valence inductance electrical length short region per unit length determined by the size of the components, the configuration and the electrical length long region is provided alternately in series, the electrical length
The long region of at least the fundamental mode and the higher modes
Including the maximum current part where the resonance current of one mode of
It is provided in the maximum resonance current region, and a pattern for correcting the electric length is formed as a resonance frequency adjusting pattern in a region where the electric length of the feeding radiation electrode is long. Pattern formed
When the resonance frequency of the mode having the maximum resonance current region is deviated from the set frequency, the electric length correction pattern is partially cut to match the deviated resonance frequency with the set frequency. The structure is used as means for solving the above-mentioned problems.

A frequency adjusting method for a surface mount antenna according to a second aspect of the present invention comprises the configuration of the above first aspect, wherein the parasitic radiation electrode is an inductance component or an equivalent inductor.
Graphics and electrical length short region per unit length determined by the size of the component, forms a structure in which the electrical length long region is provided alternately in series, a long region of the electrical length is less
In both cases, the maximum current at which the resonance current of one multiple resonance mode becomes an extreme value
It is provided in the maximum resonance current region including the flow part, and a pattern for correcting the electric length is formed as a resonance frequency adjusting pattern in a region where the electric length of the parasitic radiation electrode is long. For adjusting the resonance frequency
When the resonance frequency of the mode with the maximum resonance current region where the turn is formed deviates from the set frequency,
The not a partially cut modified pattern of the electrical length
The resonance frequency is set to match the set frequency.

According to a third aspect of the frequency adjusting method for a surface mount antenna, a feeding radiation electrode and a parasitic radiation electrode are arranged in proximity to each other on a surface of a dielectric substrate, and the parasitic radiation electrode is fed with the feeding radiation electrode. A frequency adjustment method for a surface-mounted antenna having a configuration that causes multiple resonance with a resonant wave of at least one of a fundamental mode and a higher-order mode of a radiation electrode, the fundamental mode on a current path of the feeding radiation electrode. Maximum resonance current region of the fundamental mode including the maximum current portion where the resonance current of the above is the extremum, and the maximum resonance current region of the higher mode including the maximum current portion where the resonance current of the higher order mode is the extremum and the parasitic radiation A pattern for correcting a series inductance component is provided in at least one of the maximum resonance current region including the maximum current portion where the resonance current of the multiple resonance mode has an extreme value on the current path of the electrode. When the resonance frequency of the mode having the maximum resonance current region in which the series inductance component correction pattern is formed is deviated from the set frequency, the series inductance component correction pattern is partially changed. It is characterized in that the resonance frequency to be frequency-adjusted is matched with the set frequency by cutting into the.

A frequency adjusting method for a surface mount antenna according to a fourth aspect of the present invention comprises the configuration of the third aspect of the present invention, wherein the correction pattern for the series inductance component is formed by arranging a plurality of hole patterns adjacent to each other with a space therebetween. It is configured by being characterized.

A frequency adjusting method for a surface mount antenna according to a fifth aspect of the present invention is provided with the structure of the third or fourth aspect of the invention, wherein the power supply radiation electrode has an open end at one end of a current path,
When both the resonance frequency of the fundamental mode and the resonance frequency of the higher-order mode of the feeding radiation electrode are lower than the set frequency, the open end of the feeding radiation electrode is cut to reduce the capacitance between the open end and the ground, The resonance frequency of the fundamental mode and the higher-order modes of the feeding radiation electrode are both increased toward the set frequency.

A frequency adjusting method for a surface mount antenna according to a sixth aspect of the present invention comprises the structure of the third or fourth aspect of the present invention, wherein the feeding radiation electrode has an open end at one end of a current path,
A capacitance adjustment pattern for adjusting the capacitance between the open end and the ground is formed on the open end side of the feed radiation electrode, and the resonance frequency of the fundamental mode and the resonance frequency of the higher modes of the feed radiation electrode are formed. When both are lower than the set frequency, the capacitance adjustment pattern on the open end side of the feeding radiation electrode is partially cut to reduce the capacitance between the opening end and the ground, and the fundamental mode and higher modes of the feeding radiation electrode are reduced. Both of the resonance frequencies are increased toward the set frequency.

According to a seventh aspect of the present invention, there is provided a surface mounting antenna frequency adjusting method, which comprises the third or fourth or fifth or sixth aspect of the invention, wherein the parasitic radiation electrode is a resonance of a fundamental mode of the feeding radiation electrode. Resonance of the fundamental mode that resonates with the wave and the higher mode of the feeding radiation electrode Resonates with the higher mode that resonates with the wave, and one end side of the current path is an open end. When both the resonance frequency of the fundamental mode and the resonance frequency of the higher-order mode are lower than the set frequency, the open end of the parasitic radiation electrode is cut to reduce the capacitance between the open end and the ground to reduce the parasitic radiation. It is characterized in that both the fundamental mode and the higher order resonance frequencies of the electrode are increased toward the set frequency.

A frequency adjusting method for a surface mount antenna according to an eighth aspect of the present invention has the configuration according to any one of the third to seventh aspects of the present invention, wherein the correction pattern for the series inductance component has an inductance component by cutting. Is provided, and the resonance frequency of the frequency adjustment target is gradually changed toward the set frequency by using this means.

[0017]

In the surface mount antenna according to the ninth aspect of the invention, a feeding radiation electrode and a parasitic radiation electrode are arranged adjacent to each other on the surface of the dielectric substrate with a space therebetween, and the parasitic radiation electrode is the feeding radiation electrode. A surface-mounted antenna having a configuration that causes multiple resonance with a resonant wave of at least one of a fundamental mode and a higher-order mode, wherein the resonant frequency adjusting pattern of the fundamental mode of the feeding radiation electrode and the feeding radiation electrode are provided. Of at least one of the pattern for adjusting the resonance frequency of the higher order mode and the pattern for adjusting the resonance frequency of the mode of the multiple resonance in the parasitic radiation electrode are formed, and the resonance of each mode is formed. The pattern for frequency adjustment includes the maximum current part where the resonance current of the corresponding mode on the current path in the feeding radiation electrode or the parasitic radiation electrode becomes the extreme value. It is formed in the maximum resonance current region to form a correction pattern for the series inductance component of the region, and the correction pattern for the series inductance component has a resonance frequency set by changing the inductance component stepwise by cutting. It is characterized in that a means for gradually changing toward is provided.

The communication apparatus of the tenth invention is characterized by including the surface mount antenna of the ninth invention.

In the invention of the above configuration, for example, the maximum resonance current region of the fundamental mode and the maximum resonance current region of the higher mode on the current path of the feeding radiation electrode, and the maximum resonance current of the multiple resonance mode of the parasitic radiation electrode. The region and the region having a long electric length are respectively formed, and the correction pattern of the series inductance component, that is, the correction pattern of the electric length is formed as a resonance frequency adjustment pattern in each of the regions having a long electric length. To do.

By thus forming the pattern for correcting the series inductance component (the pattern for correcting the electrical length), the frequency adjustment becomes easy. That is, when the resonance frequency of the fundamental mode of the feeding radiation electrode deviates from the set frequency, the correction pattern of the series inductance component formed in the maximum resonance current region of the fundamental mode is partially cut, Thus, the inductance component of the correction pattern is changed to correct the electrical length and the resonance frequency of the fundamental mode is made to match the set frequency.

At this time, even if the feeding radiation electrode is partially cut as described above, the cutting does not affect the resonance frequency of the higher order mode of the feeding radiation electrode. That is, the frequency can be adjusted in a state where the resonance frequency of the fundamental mode and the resonance frequency of the higher order mode are independent.

When the resonance frequency of the higher order mode of the feeding radiation electrode is adjusted or when the resonance frequency of the multiple resonance mode of the parasitic radiation electrode is adjusted, the feeding radiation electrode or the non-feeding radiation electrode is also similar to the above. Frequency adjustment is performed by partially cutting the correction pattern of the series inductance component formed in the maximum resonance current region of the frequency adjustment target mode and changing the inductance component of the pattern to correct the electrical length. Match the target resonance frequency to the set frequency. Also in this case, the frequency adjustment can be performed in a state where the resonance frequency of the frequency adjustment target and the other resonance frequencies are independent.

Since the pattern for adjusting the resonance frequency is formed as described above, a suitable cutting position when the frequency is adjusted becomes clear. Moreover, by forming the resonance frequency adjustment pattern in the maximum resonance current region of each mode on the current path of the feeding radiation electrode or the non-feeding radiation electrode, when performing the resonance frequency adjustment of the frequency adjustment target mode. It is possible to match the resonance frequency of the frequency adjustment target with the set frequency without adversely affecting the resonance frequencies of the other modes. Therefore, the frequency of the surface-mounted antenna can be adjusted easily, efficiently, and accurately.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A schematically shows a surface mount antenna according to a first embodiment of the present invention.
The surface mount antenna 1 shown in FIG. 1 (a) is a multi-band compatible antenna in which a feeding radiation electrode 3 and a parasitic radiation electrode 4 are closely arranged on the surface of a dielectric substrate 2 with a space therebetween.
It is a double resonance type and a direct excitation λ / 4 resonance type of a non-ground mounting type. In addition, in FIG.
Each surface morphology of the upper surface 2a and the side surfaces 2b, 2c, 2d of the dielectric substrate 2 is shown in a developed state.

As shown in FIG. 1A, the feeding radiation electrode 3 is formed from the upper surface 2a of the dielectric substrate 2 to the side surface 2b, and the feeding radiation electrode 3 is formed on the upper surface 2a more than the feeding radiation electrode 3. The parasitic radiation electrode 4 is formed on the right side with a gap. Further, the power supply terminal 5 is provided on the side surface 2c of the dielectric substrate 2.
Are formed. One end side of the power supply terminal 5 wraps around to the bottom surface side, and the other end side is connected to the one end side 3a of the power supply radiation electrode 3 so as to communicate therewith. The other end side 3b of the feeding radiation electrode 3
Is open-ended.

Further, the fixed electrode 6 is provided on the side surface 2b of the dielectric substrate 2 with a space from the open end 3b of the feeding radiation electrode 3.
a is arranged to face each other. Further, on the side surface 2d of the dielectric substrate 2, the open end 4a side of the parasitic radiation electrode 4 is formed to extend from the upper surface 2a, and the fixed electrodes 6b and 6c are arranged to face the open end 4a with a space therebetween. . Furthermore, a ground short-circuit terminal 7 is formed on the side surface 2c of the dielectric substrate 2 so as to be adjacent to the power supply terminal 5 with a gap therebetween, and one end of the ground short-circuit terminal 7 has the parasitic power supply electrode 4 described above.
Is connected to the end portion 4b side, and the other end side wraps around the bottom surface side.

In the first embodiment, the feeding radiation electrode 3 has a return loss characteristic as shown by the dotted line A in FIG. 2 (c), and the parasitic radiation electrode 4 is shown in FIG. 2 (c). 2 has a return loss characteristic as shown by a broken line B, and the surface mount antenna 1 may have a return loss characteristic as shown by a solid line C in FIG. 2C in which the return loss characteristics A and B are combined. It is designed to be able to.

That is, in the first embodiment, the feeding radiation electrode 3 has the resonance frequency f1 of the set fundamental mode and the resonance frequency f of the higher order mode (here, the second mode).
It is designed to resonate with two. In addition, the parasitic radiation electrode 4 has multiple resonance modes in both the fundamental mode and the higher modes, and the fundamental mode resonance wave of the parasitic radiation electrode 4 is the fundamental mode resonance wave of the feeding radiation electrode 3. In order to cause multiple resonance with, the resonance frequency f1 ′ of the fundamental mode of the parasitic radiation electrode 4 is close to the resonance frequency f1 of the fundamental mode of the feeding radiation electrode 3 and the higher-order mode of the parasitic radiation electrode 4 ( Since the resonance wave of the secondary mode) resonates with the resonance wave of the higher order mode (second mode) of the feeding radiation electrode 3, the resonance frequency f2 ′ of the higher order mode of the parasitic radiation electrode 4 is
Is designed to have a frequency near the resonance frequency f2 of the higher order mode of the feeding radiation electrode 3.

By designing the feeding radiation electrode 3 and the parasitic radiation electrode 4 as described above, as shown in FIG. 2 (c), the multiple resonance state is generated in both the fundamental mode and the higher mode. By being created, the frequency band of signal transmission / reception in both the fundamental mode and the higher order modes is widened.

By the way, the surface mount antenna 1 is mounted on a circuit board of a communication device, and the feeding terminal 5 is electrically connected to a signal supply source 9 of the circuit board through a matching circuit 8.
The matching circuit 8 may be provided as an external circuit on the circuit board of the communication device, or may be provided on the surface of the dielectric substrate 2 as a part of the electrode pattern.

When a signal is supplied from the signal supply source 9 to the feeding terminal 5 through the matching circuit 8 in the state where the surface mount antenna 1 is mounted as described above, the feeding terminal 5 feeds the radiation electrode. The signal is directly supplied to 3,
A signal is also supplied to the parasitic radiation electrode 4 by electromagnetic coupling. A current based on this supply signal is supplied from the one end side 3a of the feeding radiation electrode 3 toward the open end side 3b, and from the one end side 4b of the parasitic radiation electrode 4 toward the open end side 4a. As a result, the feeding radiation electrode 3 and the parasitic radiation electrode 4 resonate, and signals are transmitted and received. Since the surface-mounted antenna 1 shown in FIG. 1A is of a non-ground mounted type, the surface-mounted antenna 1 is mounted in the non-ground area on the circuit board of the communication device.

In FIG. 3, the current distribution on the current path of a general radiation electrode is shown by a dotted line, and the voltage distribution is shown by a solid line for each mode. In this Figure 3,
The A end is, for example, the end on the signal supply side of the feeding radiation electrode 3 or the parasitic radiation electrode 4, and the B end is on the opposite side of the feeding radiation electrode 3 or the parasitic radiation electrode 4 from the signal supply side. It corresponds to the end portion (open end in the example shown in FIG. 1A).

As shown in FIG. 3, the current distribution and the voltage distribution of the fundamental mode and higher modes (secondary mode and tertiary mode) have their own peculiar distributions. Further, for example, the maximum resonance current region P including the maximum current portion Imax where the resonance current in the fundamental mode of the radiation electrodes 3 and 4 has an extreme value.
(P1) is located at the end portion of the radiation electrodes 3 and 4 on the signal supply side on the current path, and includes the maximum current portion Imax at which the resonance current of the secondary modes of the radiation electrodes 3 and 4 has an extreme value. The resonance current region P (P2) is located substantially at the center of the current paths of the radiation electrodes 3 and 4, and thus the position of the maximum resonance current region P is different for each mode.

The inventor locally changes the inductance component of the maximum resonance current region P of each mode to change the resonance frequency of each mode independently of the resonance frequencies of other modes. I realized that I could do it.

Therefore, in the first embodiment, the maximum resonance current region P (P1) of the fundamental mode of the feeding radiation electrode 3 is obtained.
1 shown in FIG. 1, a region W of the feeding radiation electrode 3 that is the maximum resonance current region P (P2) of the secondary mode, and a parasitic radiation electrode 4 of the fundamental mode maximum resonance current region P (P2).
The region Z that is 1) and the region Y that is the maximum resonance current region P (P2) of the secondary mode of the parasitic radiation electrode 4 are respectively the most characteristic resonance frequency adjustments in the first embodiment. Pattern 10 (10a, 10b, 10c, 10) for correcting the series inductance component which is a pattern for
d) was formed.

In the first embodiment, as shown in FIG. 1, the correction patterns 10a, 10b, 10c, and 10d for the series inductance components have a plurality of hole patterns 11 arranged at intervals. Is configured.

In the first embodiment, the area where the correction pattern 10 for the series inductance component is formed has a longer electric length per unit length than the other areas. In other words, both the feeding radiation electrode 3 and the parasitic radiation electrode 4 are provided with regions having a long electric length and regions having a short electric length alternately in series along the current path.

FIG. 1B shows an equivalent circuit of the feeding radiation electrode 3 or the parasitic radiation electrode 4 on which the correction pattern 10 for the series inductance component is formed. In FIG. 1B, L1 is the maximum resonance current region P of the fundamental mode of the feeding radiation electrode 3 (or the parasitic radiation electrode 4).
(P1) That is, the inductance component of the correction pattern 10 of the series inductance component formed in the region X (Z) is represented, and L2 is the region X (Z) of the feeding radiation electrode 3 (or the parasitic radiation electrode 4). The inductance component of the region sandwiched by the region W (Y) is represented, and L3 is the maximum resonance current region P (P2) of the higher-order mode of the feeding radiation electrode 3 (or the parasitic radiation electrode 4), that is, the region W (Y). The inductance component of the correction pattern 10 of the formed series inductance component is expressed, and L4 is the inductance component of the area on the open end side of the area W (Y) of the feeding radiation electrode 3 (or the parasitic radiation electrode 4). It represents. Further, C1 and C2 respectively represent a capacitance component between the feeding radiation electrode 3 (or the parasitic radiation electrode 4) and the ground, and R
1 and R2 respectively represent conduction resistance components.

For example, by cutting (trimming) the correction pattern 10 of the series inductance component to change the inductance component of the correction pattern 10, the unit length of the region in which the correction pattern 10 is formed is changed. The electric length of changes in the direction of increasing. From this, the correction pattern 10 for the series inductance component is equivalent to the correction pattern for the electrical length.

The surface mount antenna 1 in the first embodiment is constructed as described above. Below, an example of a frequency adjustment method in the surface-mounted antenna 1 of the first embodiment will be described. For example, when the resonance frequency f1 of the fundamental mode of the feeding radiation electrode 3 is deviated in the direction higher than the set frequency, the pattern 10a for correcting the series inductance component formed in the maximum resonance current region P of the fundamental mode, that is, the region X. Is partially cut, and the series inductance component of the correction pattern 10a is locally increased to increase the electrical length, whereby the resonance frequency f1 of the fundamental mode is lowered toward the set frequency.

Specifically, for example, as shown in FIG.
Area a1, area a2, and area a3 in the series inductance component correction pattern 10a are sequentially removed by cutting (or area a1 ′, area a2 ′, and area a3 ′ are sequentially removed by cutting). Iku)
The correction pattern 10 is partially cut in a direction to form a cut so as to form a meander-shaped pattern, and the inductance component of the correction pattern 10 is gradually increased (the electrical length is gradually increased. ), The fundamental mode resonance frequency f1 is gradually lowered toward the set frequency. In the first embodiment, as shown in FIG. 4, a pattern 12 for correcting the series inductance component is provided with a notch 12 for indicating a cutting start position and a cutting direction at the time of frequency adjustment. ing. This cutout 1
According to 2, it is possible to prevent the operator of the frequency adjustment from making a mistake in the cutting order, and it is possible to perform an appropriate frequency adjustment work.

Further, the correction pattern 10a for the series inductance component is partially cut in the direction indicated by the dotted arrow E in FIG. 4 to narrow the current path, whereby the correction pattern 10a for the series inductance component is obtained. The resonance component f1 of the fundamental mode may be lowered toward the set frequency by increasing the inductance component of Eq.

As described above, the inductance component of the correction pattern 10a of the series inductance component is locally increased to increase the electrical length, and the resonance frequency f of the fundamental mode is increased.
Decrease 1 to match the set frequency. When the resonance frequency f1 of the fundamental mode is adjusted, the influence of the frequency adjustment hardly reaches the resonance frequency of the higher order mode. Therefore, without changing the resonance frequency f2 of the higher order mode,
The frequency can be adjusted as described above with the resonance frequency f1 of the fundamental mode being independent of the resonance frequency f2 of the higher order mode.

The resonance frequency f2 of the secondary mode of the feeding radiation electrode 3 and the resonance frequency f of the fundamental mode of the parasitic radiation electrode 4
When the resonance frequency f2 ′ of 1 ′ or the secondary mode is deviated in the direction higher than the set frequency, in the same manner as above,
Pattern 10b, 10c or 10d for correcting the series inductance component formed in the maximum resonance current region P (that is, the region W, Z or Y) of the frequency adjustment target mode.
Is partially cut, and the series inductance component of the correction pattern 10 is locally increased to increase the electrical length, whereby the resonance frequency of the frequency adjustment target is lowered toward the set frequency. In this way, the resonance frequency of the frequency adjustment target can be matched with the set frequency.

Even when the resonance frequencies f2, f1 ', and f2' are adjusted, the resonance frequency f1 of the fundamental mode is obtained.
Similar to the frequency adjustment of, the resonance frequency of each mode can be adjusted independently of the resonance frequencies of the other modes.

Of course, the series inductance component correction patterns 10b, 10c, and 10d are also formed with the same cutouts as the cutouts 12 formed in the series inductance component correction pattern 10a.

When the resonance frequencies f1 and f2 of the fundamental mode and the secondary mode of the feeding radiation electrode 3 are both deviated in the direction lower than the set frequency, the open end 3b of the feeding radiation electrode 3 is cut. The open end 3b and the fixed electrode 6
The capacitance between the open end 3b and the ground is reduced by widening the space between a and the capacitance between the open end 3b and the fixed electrode 6 to reduce the resonance frequencies of the fundamental mode and the secondary mode. Both f1 and f2 are increased toward the set frequency.

Similarly to the above, when the resonance frequencies f1 'and f2' of the fundamental mode and the secondary mode of the parasitic radiation electrode 4 both deviate in the direction lower than the set frequency, the parasitic radiation electrode 4 is opened. By cutting the end 4a in the direction of arrow F shown in FIG. 1 (a) to shorten the parasitic radiation electrode 4, the capacitance between the open end 4a and the fixed electrodes 6b and 6c can be reduced. By reducing the capacitance between 4a and the ground, both resonance frequencies f1 ′ and f2 ′ of the fundamental mode and the secondary mode of the parasitic radiation electrode 4 are both increased toward the set frequency. As described above, the open ends 3b and 4a of the feeding radiation electrode 3 or the parasitic radiation electrode 4 function as a capacitance adjusting pattern.

By adjusting the frequency as described above, the resonance frequency f of each mode of the feeding radiation electrode 3 and the parasitic radiation electrode 4
It is possible to make 1, f1 ', f2, and f2' all substantially equal to the set frequency.

According to the first embodiment, the maximum resonance current region P (region X) of the fundamental mode and the maximum resonance current region P of the higher mode on the current path of the feeding radiation electrode 3 are provided.
(Region W), the maximum resonance current region P of the fundamental mode (region Z) and the maximum resonance current region P of the higher mode (region Y) on the current path of the parasitic radiation electrode 4 are respectively corrected in series inductance components. A pattern (electrical length correction pattern) 10 was formed as a resonance frequency adjustment pattern. By providing this configuration, the feeding radiation electrode 3
Resonance frequency f1 of the fundamental mode, resonance frequency f2 of the higher order mode, and resonance frequency f of the fundamental mode of the parasitic radiation electrode 4.
When the 1 'or higher-order mode resonance frequency f2' deviates from the set frequency due to the problem of processing accuracy, the series inductance component formed in the maximum resonance current region P of the mode whose frequency is to be adjusted is corrected. The cutting pattern 10 is partially cut to locally change the series inductance component of the correction pattern 10 to change the electrical length, and the technique of reducing the open end capacitance and increasing the resonance frequency is used together. Thus, the resonance frequency of the frequency adjustment target mode can be matched with the set frequency.

In addition, in the first embodiment, since the resonance frequency adjusting pattern 10 is formed as described above, the position to be cut during frequency adjustment can be clearly understood. Further, since it is possible to surely cut the position suitable for frequency adjustment and perform the frequency adjustment, even an inexperienced person can easily and quickly perform the frequency adjustment. The cost can be reduced, and the cost of the surface mount antenna 1 can be reduced. Furthermore, automation of frequency adjustment can be realized, and further cost reduction is possible.

Furthermore, in the first embodiment, as described above, the pattern 10 for correcting the series inductance component is used.
Is formed in the maximum resonance current region P of each mode, therefore, during frequency adjustment, only the resonance frequency of the frequency adjustment target is changed without changing the resonance frequency other than the frequency adjustment target, that is, the frequency. The resonance frequency to be adjusted can be changed in a state of being independent of other resonance frequencies to match the set frequency. As a result, the frequency of the surface mount antenna 1 can be adjusted easily and efficiently, and the mass productivity of the surface mount antenna 1 can be improved. In addition, each of the above resonance frequencies can be accurately matched with the set frequency.

Therefore, the surface mount antenna 1 having excellent antenna characteristics can be provided at a low cost by providing the characteristic configuration of the first embodiment and adjusting the peculiar frequency. .

The second embodiment will be described below. In the description of the second embodiment, the same components as those of the first embodiment will be designated by the same reference numerals, and duplicate description of the common parts will be omitted.

While the surface mount antenna 1 of the first embodiment is a non-ground mount type,
The surface mount antenna of the second embodiment is of the ground mount type having the structure shown in FIG. In addition, in FIG. 5, as in the case of FIG.
Each surface morphology of the upper surface 2a and the side surfaces 2b, 2c, 2d is illustrated in a developed state.

As shown in FIG. 5, the upper surface 2 of the dielectric substrate 2 is
In a, a feeding radiation electrode 3 and a parasitic radiation electrode 4 are arranged adjacent to each other with a space therebetween. Further, on the side surface 2c of the dielectric substrate 2, a power supply terminal 5 and a ground short-circuit terminal 7 are arranged adjacent to each other with a space therebetween, and a matching circuit 8 which is connected to the power supply terminal 5 for communication is formed. The signal supply side end 3a of the power supply radiation electrode 3 is connected to the power supply terminal 5, and the signal supply side end 4b of the parasitic power supply electrode 4 is connected to the ground short-circuit terminal 7. Although the matching circuit 8 is formed on the surface of the dielectric substrate 2 in the example shown in FIG. 5, the matching circuit 8 of the surface mount antenna 1 is omitted and the matching circuit 8 is provided on the circuit board of the communication device. May be provided.

Further, an open end 3b extending from the feeding radiation electrode 3 is formed on the side surface 2b of the dielectric substrate 2, and a fixed electrode 6 is arranged opposite to the open end 3b with a space therebetween. Furthermore, on the side surface 2d of the dielectric substrate 2, an open end 4a extended from the parasitic radiation electrode 4 is formed.
In the same manner as described above, the fixed electrode 6 is arranged opposite to the open end 4a with a space therebetween.

Further, the dielectric substrate 2 shown in FIG. 5 is formed with a through hole 14 penetrating from the side surface 2b to the side surface 2d. By forming the through hole 14, it is possible to reduce the weight of the dielectric substrate 2. Further, the effective permittivity between the ground and the radiation electrode is reduced, the electric field concentration is alleviated, and a wide band and a high gain can be realized.

Also in the second embodiment, as in the first embodiment, the fundamental mode resonance wave of the parasitic radiation electrode 4 undergoes multiple resonance with the fundamental mode resonance wave of the feeding radiation electrode 3. Further, the higher-order mode resonance wave of the parasitic radiation electrode 4 is designed to resonate with the higher-order mode resonance wave of the feeding radiation electrode 3, and the resonance wave of both the fundamental mode and the higher-order mode is reproduced. In the resonance state, the frequency band of signal transmission / reception is widened.

The feeding radiation electrode 3 receives the signal from the signal supply source 9 as in the first embodiment, and feeds the signal from the feeding terminal 5.
Directly, and the parasitic radiation electrode 4 is supplied with a signal by electromagnetic coupling. The current based on the supply signal is supplied from the one end side 3a of the feeding radiation electrode 3 to the open end 3b.
And toward the open end 4a from the one end side 4b of the parasitic radiation electrode 4.

Also in the second embodiment, as in the first embodiment, the region X which is the maximum resonance current region P (P1) of the fundamental mode on the current path of the feeding radiation electrode 3, Higher-order mode maximum resonance current region P (P2)
A region W which is a maximum resonance current region P (P1) of the fundamental mode on the current path of the parasitic radiation electrode 4, and a region Y which is a maximum resonance current region P (P2) of a higher mode. A series inductance component correction pattern (electrical length correction pattern) 10, which is a frequency adjustment pattern, is formed on each of these.

The surface mount antenna 1 shown in the second embodiment is constructed as described above. When the frequency of the surface-mounted antenna 1 is adjusted as described above, the correction of the series inductance component formed in the maximum resonant current region P of the frequency adjustment target mode is performed as in the first embodiment. By partially cutting the pattern 10 and increasing the cut depth of the cut 13, the inductance component of the correction pattern 10 is increased (electrical length is increased) and the resonance frequency of the frequency adjustment target mode. Can be lowered.

Further, the open end 3b of the feeding radiation electrode 3 or the open end 4a of the parasitic radiation electrode 4 is cut to open the end 3.
By reducing the capacitance between b and 4a and the ground, the resonance frequencies f1 and f2 of both the fundamental mode and the higher-order mode of the feeding radiation electrode 3 or the fundamental frequencies and the higher-order modes of the parasitic radiation electrode 4 are reduced. The resonance frequencies f1 ′ and f2 ′ can be simultaneously increased.

Also in the second embodiment, the same excellent effect as in the first embodiment can be obtained.

The third embodiment will be described below. In the description of the third embodiment, the same components as those in each of the embodiments will be designated by the same reference numerals, and duplicate description of the common parts will be omitted.

FIG. 6 shows a third embodiment of the surface mount antenna. Also in this FIG. 6, FIG.
And the upper surface 2a and the side surface 2b of the dielectric substrate 2, as in FIG.
The surface morphologies 2c and 2d are shown in the unfolded state.

The surface mount type antenna 1 shown in the third embodiment is a non-ground mount type direct excitation type, and as shown in FIG. 6, the power supply radiation electrodes 3 and 2 are provided on the surface of the dielectric substrate 2. The individual parasitic radiation electrodes 4A and 4B are formed with a space therebetween. The feeding radiation electrode 3 has substantially the same structure as the feeding radiation electrode 3 shown in FIG. 1, and the parasitic radiation electrodes 4A and 4B are the dielectric substrate 2.
Are formed on the upper surface 2a on the right side of the drawing with respect to the feeding radiation electrode 3 with a space therebetween.

The resonance frequencies f1 'and f1''of the fundamental modes of the parasitic radiation electrodes 4A and 4B are slightly different from each other, and the resonance frequency f of the fundamental mode of the feeding radiation electrode 3 is f.
The frequency is in the vicinity of 1, and the parasitic radiation electrode 4
The fundamental mode resonance waves A and 4B create a triple resonance state with the fundamental mode resonance wave of the feeding radiation electrode 3. Similarly, the resonance frequencies f2 ′ and f2 ″ of the higher order modes of the parasitic radiation electrodes 4A and 4B are slightly different from each other, and the resonance frequency f of the higher order mode of the feed radiation electrode 3 is f.
The frequency is in the vicinity of 2, and the parasitic radiation electrode 4
The higher-order mode resonance waves of A and 4B create a triple-resonant state with the higher-order mode resonance wave of the feeding radiation electrode 3. In this way, by creating the triple double resonance state, it is possible to further widen the frequency band of signal transmission / reception in the fundamental mode and the higher mode.

One end side of each of the parasitic radiation electrodes 4A and 4B is commonly connected to the ground short-circuit terminal 7 formed on the side surface 2c, and the other end side of each of the parasitic radiation electrodes 4A and 4B is an open end. Is made. Each parasitic radiation electrode 4
In A and 4B, the current flows from one end communicating with the ground short-circuit terminal 7 toward the open end, and the maximum resonance current region P of the fundamental mode P on the current path of each parasitic radiation electrode 4A, 4B. Region Z, Z'that is (P1)
And a region Y, Y'which is the maximum resonance current region P (P2) of the higher-order mode, a series inductance component correction pattern (electrical length correction pattern) 10 which is a resonance frequency adjustment pattern, respectively. Has been formed.

Also in the third embodiment, the correction pattern of the series inductance component (electrical length) similar to that of each of the above embodiments is provided on each current path of the feeding radiation electrode 3 and the parasitic radiation electrodes 4A and 4B. Since the correction pattern 10 is formed, it is formed in the maximum resonance current region P of the mode of the frequency adjustment target in the feeding radiation electrode 3, the parasitic radiation electrode 4A, or the parasitic radiation electrode 4B, as in the above-described embodiments. Pattern 10 for correcting the series inductance component
To change the inductance component of the correction pattern 10 to increase the electrical length, thereby making the resonance frequency of the frequency adjustment target match the set frequency in a state of being independent of the resonance frequencies of other modes. You can

Further, the feeding radiation electrode 3 and the parasitic radiation electrode 4
When the resonance frequencies of the fundamental mode and the higher-order modes of A and 4B are both lower than the set frequency, cut the open ends of the feeding radiation electrode 3 and the parasitic radiation electrodes 4A and 4B whose frequency is to be adjusted. It is possible to increase both the resonance frequencies of the fundamental mode and the higher-order modes at the same time to match the set frequency.

Also in the third embodiment, the same excellent effects as those of the respective embodiments can be obtained.

The fourth embodiment will be described below. In this fourth embodiment, an example of a communication device is shown. As shown in FIG. 7, the communication device according to the fourth embodiment is a mobile phone, and a circuit board 22 is built in a case 21 of the mobile phone 20. As shown in FIG. 7, a transmission circuit 23, a reception circuit 24, and a transmission / reception switching circuit 25, which are signal supply sources, are formed on the circuit board 22.

What is characteristic of the communication device of the fourth embodiment is that the surface mount antenna 1 having the peculiar structure shown in each of the embodiments is mounted on the circuit board 22. Is. This surface mount antenna 1
Are electrically connected to the transmission circuit 23 and the reception circuit 24 through a transmission / reception switching circuit 25. In the portable telephone 20, the signal transmission / reception operation is smoothly performed by the switching operation of the transmission / reception switching circuit 25.

According to the fourth embodiment, since the portable telephone 20 is equipped with the multi-resonance type surface mount antenna as shown in each of the above embodiments, the frequency band for signal transmission / reception is widened. In addition, since the surface mount antenna 1 has the resonance frequencies of the feeding radiation electrode 3 and the parasitic radiation electrode 4 which are substantially equal to the set frequency due to the frequency adjustment, the reliability of the antenna characteristics can be improved. It is possible to provide a communication device having high efficiency.

The present invention is not limited to the above embodiments, but various embodiments can be adopted. For example, the resonance frequency adjustment pattern (the series inductance component correction pattern (electrical length correction pattern) 10) shown in each of the above embodiments is a plurality of hole patterns 11.
8 are formed so as to be adjacent to each other with a space therebetween, for example, instead of the pattern for adjusting the resonance frequency,
A meandering pattern as shown in (a) may be formed as a resonance frequency adjusting pattern. Also, FIG.
As shown in (b) and (c), a part of the meandering pattern may be made thicker than the other part to facilitate cutting for frequency adjustment.

As shown in FIG. 9B, the current path 1
When the capacitance component C is provided in parallel with 5, the state becomes equivalent to adding the inductance component L in series to the current path 15 as shown in FIG. 9C. By utilizing this, for example, a series inductance component correction pattern (electrical length correction pattern) as shown in FIG. 9A may be formed as the resonance frequency adjustment pattern. That is, the capacitance adding electrode 16 is provided in the vicinity of the maximum resonance current region P of each mode on the current path of the feeding radiation electrode 3 and the parasitic radiation electrode 4.
Is provided so as to equivalently add a series inductance component to the maximum resonance current region P of the current path, and when the frequency is adjusted, the capacitance adding electrode 16 or the radiation electrode portion 17 facing the electrode 16 is cut. Then, by changing the capacitance between the maximum resonance current region P and the capacitance-adding electrode 16 to change the inductance component (changing the electrical length), frequency adjustment can be performed in the same manner as in each of the embodiments. You can go.

Further, in each of the above embodiments, the pattern for adjusting the resonance frequency of the fundamental mode of the feeding radiation electrode 3 and the pattern for adjusting the resonance frequency of the higher order modes, and the resonance frequency of the fundamental mode of the parasitic radiation electrode 4 are used. Although the adjustment pattern and the high-order mode resonance frequency adjustment pattern were all formed, they are formed as necessary, and are the basics of the feeding radiation electrode 3 and the parasitic radiation electrode 4 described above. It is not necessary to form all the patterns for adjusting the resonance frequencies of the modes and the higher modes.

Further, in each of the above-mentioned embodiments, FIG.
As shown in (c), the multiple resonance state is created in both the fundamental mode and the higher-order mode. However, for example, one of the fundamental mode and the higher-order mode of the parasitic radiation electrode 4 is As shown by the solid line C in FIGS. 2 (a) and 2 (b), only one of the fundamental mode and the higher order mode is resonated with the resonant wave of the fundamental mode or the higher order mode of the feeding radiation electrode 3. May be configured to be in a multiple resonance state.

Further, in each of the above-described embodiments, the example in which the frequency is adjusted in the secondary mode as the higher order mode is shown.
Of course, the frequency may be adjusted in higher-order modes of the third-order mode and higher. In this case, the resonance frequency adjusting pattern as described above is formed in the maximum resonance current region P of the third mode on the current path of the feeding radiation electrode 3 or the parasitic radiation electrode 4.

Further, although the surface mount antenna 1 shown in each of the above embodiments is of the direct excitation λ / 4 resonance type, the present invention may be applied to the capacitive power feeding type.
Further, it may be applied to an inverted F type antenna, and can be applied to various types of surface mount antennas.

[0084]

According to the present invention, a pattern for adjusting the resonance frequency of the fundamental mode of the feeding radiation electrode, a pattern for adjusting the resonance frequency of the higher order mode, and a resonance frequency adjustment of the multiple resonance mode of the parasitic radiation electrode. Since one or more of the above patterns are formed, the cutting position for frequency adjustment is clear, and even if you are not an experienced person, you can cut a position suitable for frequency adjustment and cut the frequency. The adjustment can be easily performed.

In particular, the pattern for adjusting the resonance frequency of each mode is formed in the maximum resonance current region of the corresponding mode on the current path of the feeding radiation electrode or the parasitic radiation electrode, and the pattern for correcting the series inductance component of the region is formed. In the case of (electrical length correction pattern), the resonance frequency of the mode having the maximum resonance current region in which the correction pattern of the series inductance component is formed is deviated from the set frequency. In this case, the pattern for correcting the series inductance component is partially cut to change the series inductance component to change the electric length, thereby performing frequency adjustment to match the resonance frequency of the frequency adjustment target with the set frequency. It can be carried out.

As described above, in the case of changing the resonance frequency of the frequency adjustment target by changing the inductance component of the maximum resonance current region in the frequency adjustment target mode,
Since the resonance frequency of the frequency adjustment target can be changed while being independent of the other resonance frequencies, the frequency adjustment can be performed easily, in a short time, and with high accuracy. Therefore, the frequency adjustment cost can be reduced, and the cost of the surface mount antenna can be reduced. Further, automation of frequency adjustment becomes easy to realize, and further cost reduction is expected.

As a result, the characteristics and mass productivity of the surface mount antenna can be improved, and the surface mount antenna having excellent antenna characteristics can be provided at a low cost.

The feeding radiation electrode has an open end at one end of the current path, and when the resonance frequencies of the fundamental mode and the higher modes of the feeding radiation electrode are both lower than the set frequency, or when the parasitic radiation electrode is in the current path. If one end side of the above is an open end, and the resonance frequencies of the fundamental mode and higher modes of the parasitic radiation electrode are both lower than the set frequency, cut the open end of the above-mentioned feeding radiation electrode or parasitic radiation electrode. In order to reduce the capacitance between the open end and the ground to increase the resonance frequency of both the fundamental mode and the higher mode of the feeding radiation electrode or the parasitic radiation electrode toward the set frequency, the feeding radiation electrode Alternatively, simply cutting the open end of the parasitic radiation electrode can change the resonance frequency of both the fundamental mode and the higher-order modes toward the set frequency, enabling efficient frequency adjustment. Ukoto so that the can.

In the case where a means for cutting the correction pattern of the series inductance component partially to change the inductance component of the correction pattern stepwise is provided, the frequency adjustment is performed by utilizing that means. The target resonance frequency can be gradually changed to the set frequency. When performing such frequency adjustment, the trouble of adjusting the amount of cutting of the pattern based on experience is eliminated, so it is possible to perform the frequency adjustment more easily and improve the mass productivity of the surface mount antenna. It can be further improved.

By providing the communication device with the surface mount antenna capable of adjusting the above-mentioned specific frequency, it is possible to provide a communication device having a highly reliable antenna characteristic at a low cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment example of a surface mount antenna according to the present invention.

FIG. 2 is a graph showing an example of frequency characteristics of a surface mount antenna.

FIG. 3 is a graph showing, for each mode, current distribution and voltage distribution in a current path of a feeding radiation electrode and a parasitic radiation electrode.

FIG. 4 is a diagram for explaining an example of cutting a series inductance component correction pattern that is a resonance frequency adjustment pattern when performing frequency adjustment of the surface mount antenna shown in FIG. 1;

FIG. 5 is an explanatory diagram showing a second embodiment example.

FIG. 6 is an explanatory diagram showing a third embodiment example.

FIG. 7 is a model diagram showing an example of a communication device according to the present invention.

FIG. 8 is an explanatory diagram showing another embodiment example of the correction pattern of the series inductance component.

FIG. 9 is an explanatory diagram showing another embodiment example of a correction pattern for a series inductance component.

[Explanation of symbols]

1 Surface mount antenna 2 Dielectric substrate 3 Feeding radiation electrode 4 Parasitic radiation electrode 5 power supply terminals 7 Ground short-circuit terminal 10 Correction pattern for series inductance component 11 hole pattern 20 mobile phones

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kengo Onaka Kengo Onaka 2 26-10 Tenjin Tenjin, Nagaokakyo City, Kyoto Murata Manufacturing Co., Ltd. (72) Inventor Takashi Ishihara 2 26-10 Tenjin Nagaokakyo, Kyoto (56) Reference JP-A-9-260934 (JP, A) JP-A-9-69718 (JP, A) JP-A-8-250917 (JP, A) JP-A-10-256825 ( JP, A) JP 9-36630 (JP, A) JP 10-79622 (JP, A) JP 10-209744 (JP, A) JP 56-711 (JP, A) Flat 1-115310 (JP, U) Actual Flat 7-14714 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01Q 1/38 H01Q 5/00 H01Q 9/30

Claims (10)

(57) [Claims] 1. A feed radiation electrode and a parasitic radiation electrode are arranged adjacent to each other on a surface of a dielectric substrate with a gap, and the parasitic radiation electrode is at least one of a fundamental mode and a higher mode of the feeding radiation electrode. A frequency adjusting method for a surface-mounted antenna having a configuration of multiple resonance with a resonance wave of one mode, wherein the feeding radiation electrode has an inductance component or an equivalent inductance along a current path of the feeding radiation electrode. A region having a short electric length per unit length determined by the size of the component and a region having a long electric length are alternately provided in series, and the region having a long electric length is at least the basic mode and the high mode. The resonance current of one of the following modes is provided in the maximum resonance current region including the maximum current portion where the resonance current has an extreme value, and the region where the electric length is long in the feeding radiation electrode has the electric length The correction pattern is formed as a resonance frequency adjustment pattern, and the resonance frequency of the mode having the maximum resonance current region in which the resonance frequency adjustment pattern is formed in the feeding radiation electrode is deviated from the set frequency. In some cases, the frequency adjustment method for a surface-mounted antenna is characterized in that the electric length correction pattern is partially cut to match the shifted resonance frequency with a set frequency. 2. The parasitic radiating electrode is configured such that a region having a short electrical length and a region having a long electrical length per unit length determined by the magnitude of an inductance component or an equivalent inductance component are alternately provided in series. The long electric length region is provided in the maximum resonance current region including the maximum current portion where the resonance current of at least one multiple resonance mode has an extreme value, and the long electric length of the parasitic radiation electrode is long. An electric length correction pattern is formed in the region as a resonance frequency adjustment pattern, and the resonance frequency of a mode having a maximum resonance current region in which the resonance frequency adjustment pattern in the parasitic radiation electrode is formed is When it is deviated from the set frequency, the electric length correction pattern is partially cut so that the deviated resonance frequency matches the set frequency. The method for adjusting the frequency of a surface-mounted antenna according to claim 1, wherein. 3. A feed radiation electrode and a parasitic radiation electrode are arranged adjacent to each other on a surface of a dielectric substrate with a gap therebetween, and the parasitic radiation electrode is at least one of a fundamental mode and a higher mode of the feeding radiation electrode. A frequency adjusting method for a surface-mounted antenna having a configuration of multiple resonance with a resonance wave of one mode, the method including a maximum current portion in which a resonance current of a fundamental mode on a current path of the feeding radiation electrode has an extreme value. The maximum resonance current region of the fundamental mode and the maximum resonance current region of the higher mode including the maximum current part where the resonance current of the higher mode becomes an extreme value, and the resonance of the multiple resonance mode on the current path of the parasitic radiation electrode A correction pattern for the series inductance component is formed in one or more of the maximum resonance current region including the maximum current portion where the current has an extreme value, and the series inductance component is corrected. When the resonance frequency of the mode having the maximum resonance current region in which the use pattern is formed deviates from the set frequency, the correction pattern of the series inductance component is partially cut to set the resonance frequency of the frequency adjustment target. A method for adjusting the frequency of a surface-mounted antenna, which is characterized by matching the set frequency. 4. The frequency adjustment method for a surface mount antenna according to claim 3, wherein the correction pattern for the series inductance component is formed by arranging a plurality of hole patterns adjacent to each other with a space therebetween. 5. The feeding radiation electrode has an open end at one end side of the current path, and when both the resonance frequency of the fundamental mode and the resonance frequency of the higher order mode of the feeding radiation electrode are lower than the set frequency, The open end of the power feeding radiation electrode is cut to reduce the capacitance between the open end and the ground, and the resonance frequencies of the fundamental mode and higher modes of the power feeding radiation electrode are both increased toward the set frequency. The frequency adjustment method for a surface mount antenna according to claim 3 or 4. 6. The feeding radiation electrode has an open end on one end side of a current path, and a capacitance adjusting pattern for adjusting the capacitance between the opening end and the ground is provided on the open end side of the feeding radiation electrode. When the resonance frequency of the fundamental mode and the resonance frequency of the higher modes of the feeding radiation electrode are both lower than the set frequency, the capacitance adjustment pattern on the open end side of the feeding radiation electrode is partially cut. 5. The surface according to claim 3, wherein the capacitance between the open end and the ground is reduced, and the resonance frequencies of the fundamental mode and the higher modes of the feeding radiation electrode are both increased toward the set frequency. Frequency adjustment method for mounted antenna. 7. The parasitic radiation electrode resonates in a fundamental mode that is multi-resonant with a fundamental mode resonance wave of the feeding radiation electrode and a higher-order mode that is multiple resonances with a higher-order resonance wave of the feeding radiation electrode, and One end side of the current path is an open end, and when the resonant frequency of the fundamental mode and the resonant frequency of the higher-order modes of the parasitic radiation electrode are both lower than the set frequency, the open end of the parasitic radiation electrode is closed. 4. The cutting method for reducing the capacitance between the open end and the ground to increase both the resonance frequencies of the fundamental mode and the higher-order modes of the parasitic radiation electrode toward the set frequency. 4. The frequency adjusting method for a surface mount antenna according to claim 4 or claim 5. 8. The pattern for correcting the series inductance component is provided with means for gradually changing the inductance component by cutting, and using this means, the resonance frequency of the frequency adjustment target is gradually changed toward the set frequency. The frequency adjusting method for a surface mount antenna according to any one of claims 3 to 7, characterized in that the frequency is adjusted. 9. A feed radiation electrode and a parasitic radiation electrode are arranged on the surface of a dielectric substrate in the vicinity of each other with a gap, and the parasitic radiation electrode is one of a fundamental mode and a higher mode of the feeding radiation electrode. A surface mount antenna having a structure that causes multiple resonance with a resonant wave of at least one mode, comprising: a pattern for adjusting a resonant frequency of a fundamental mode of the feeding radiation electrode and a resonant frequency of a higher mode of the feeding radiation electrode. And a pattern for adjusting the resonance frequency of the multiple resonance mode in the parasitic radiation electrode.
One or more patterns are formed, and the pattern for adjusting the resonance frequency of each mode includes the maximum current part where the resonance current of the corresponding mode on the current path in the feeding radiation electrode or the parasitic radiation electrode becomes the extreme value. It is formed in the maximum resonance current region to form a correction pattern for the series inductance component of the region, and the correction pattern for the series inductance component has a resonance frequency set by changing the inductance component stepwise by cutting. A surface-mounted antenna characterized in that a means for gradually changing the surface is provided. 10. A communication apparatus characterized by comprising a surface-mounted antenna of claim 9 Symbol mounting.