CN2919568Y - Panel Antennas for Wireless Networking Devices - Google Patents

Abstract

A patch antenna suitable for use in a wireless network device, comprising: a substrate, a grounding part, a first antenna, a second antenna and a third antenna. The substrate is made of dielectric material, and a first direction and a second direction perpendicular to each other are defined on a layer surface of the substrate. The grounding part is electrically grounded and at least covers a partial area of the substrate layer. The first antenna is a dipole antenna and extends from the grounding part along the first direction. The second antenna is a monopole antenna and extends from the grounding part towards the second direction. The third antenna is a monopole antenna and extends from the grounding part towards the second direction. The second antenna and the third antenna are substantially respectively located at two opposite sides of the first antenna.

Description

Panel Antennas for Wireless Networking Devices

technical field

The utility model relates to a flat antenna, in particular to a flat antenna suitable for MIMO wireless network devices.

Background technique

Please refer to FIG. 1 , which is a perspective view of a typical wireless network device 10 . The wireless network device 10 generally includes: a main body 11, an internal circuit device 12 located inside the main body, a connector part 13 located at one end of the main body 11, which is used to connect to an external host (not shown), And an antenna signal transceiving part 14 located on the body 11 and opposite to the connector part 12 at the other end. Generally speaking, the outer casing of the antenna signal transceiving part 14 is made of non-metallic material, and when the wireless network device 10 is connected to an external host, the antenna signal transceiving part 14 needs to be exposed to the outside of the external host so as to be able to Effectively send and receive wireless signals. For general user's operating habits, the X-Y plane shown in FIG. 1 is the plane that most needs to have higher wireless signal transmission performance. Therefore, for the antenna design of the wireless network device 10, the focus of current research and development is mostly on how to improve the isolation between the antennas in the direction of the X-Y plane and reduce the dead angle of the antenna radiation pattern. In order to effectively strengthen the transmitting and receiving capability of the antenna on the X-Y plane.

As shown in FIG. 2 , it is a schematic diagram of a conventional internal circuit device 20 of a MIMO wireless network device. The existing internal circuit device 20 of the MIMO wireless network device includes: a substrate 21, a control circuit 22 located on the substrate 21, a grounding portion 23 covering a predetermined area on the substrate 21, and an antenna unit 24 is electrically connected to the control circuit 22 .

For the antenna design of the wireless network device conforming to the MIMO specification, three antennas are used to form three transmitting and two receiving antenna units. For example, in the conventional MIMO antenna unit 24 shown in FIG. 2 , it includes a first antenna 241 located in the middle, and a second antenna 242 and a third antenna 243 respectively located on both sides of the first antenna 241 . The three antennas 241, 242, and 243 are monopole antennas (Monopole Antenna) arranged adjacent to each other and extending in the same direction (ie, toward the right x direction in FIG. 2 ). The three antennas 241 , 242 , 243 pass through (cross) the ground portion 23 through the first, second and third feeding lines 251 , 252 , 253 respectively to connect to the control circuit 22 and be driven and controlled by it. An important deficiency of this kind of MIMO antenna unit 24 is that its three monopole antennas 241, 242, 243 are designed to extend in the same direction and be adjacent to each other. Therefore, the adjacent antennas (such as the first antenna 241 and The isolation between the second antennas 242) is poor. In addition, the first antenna 241 adopts a monopole antenna design, which also makes its radiation pattern (Radiation Pattern) dead angle on the X-Y plane larger. For example, as shown in FIG. 3 , it is a radiation pattern diagram obtained by testing the first antenna 241 of the conventional MIMO antenna unit 24 shown in FIG. 2 on the X-Y plane. It can be seen from the radiation pattern diagram in FIG. 3 that the maximum gain value of the first antenna 241 in the horizontal direction (Horizontal) is only -0.79dBi, that is, there is almost no gain function. In addition, as shown in FIG. 4 , it is an Isolation curve obtained from testing between the first antenna 241 and the second antenna 242 in the conventional MIMO antenna unit 24 shown in FIG. 2 . It can be seen from the isolation curve in FIG. 4 that the isolation value between the first antenna 241 and the second antenna 242 is about -6.01dB within the application frequency range of 2.4GHz to 2.5GHz, which is still greater than In the general market, the isolation value of high-efficiency antenna design needs to be lower than -10dB, and there is obviously room for further improvement.

Contents of the invention

The purpose of this utility model is to provide a flat panel antenna, which can have a better antenna radiation pattern to increase the gain value and reduce the dead angle, and the isolation between two adjacent antennas is better to avoid interference and improve antenna performance .

Another object of the present utility model is to provide a flat panel antenna, which is equipped with a dipole antenna and a monopole antenna on both sides respectively to form a three-antenna design with three transmissions and two receptions, which can be applied to MIMO wireless network devices superior. In addition, the extension directions of the two adjacent antennas are set in a vertical direction, so that the isolation effect between the two adjacent antennas can be improved.

In order to achieve the above-mentioned purpose, the utility model provides a flat panel antenna suitable for wireless network devices, which is characterized in that it includes: a substrate, a first direction perpendicular to each other is defined on one surface of the substrate and a second direction, and the substrate has at least a first edge perpendicular to the first direction, and a second edge perpendicular to the second direction; a ground portion, which is electrically grounded and Covering at least a part of the substrate layer, the ground portion is separated from the first edge by a first distance in the first direction, and is separated from the second edge in the second direction. separated by a second interval; a first antenna is extended from the ground portion toward the first edge and is located at the first interval; a second antenna is extended from the ground portion toward the second edge and is located at the the second interval.

It further includes a third antenna, which is located on the other side of the ground part relative to the second antenna, so that the second antenna and the third antenna are isolated by the ground part, and the shape of the third antenna is substantially corresponding to in the shape of the second antenna. The first antenna is a dipole antenna, and the second antenna is a monopole antenna. The substrate has a first layer and a second layer opposite to each other, grounding parts are respectively provided on the two layers, and the areas covered by the grounding parts on the two layers correspond to each other and have the same outline, and The first and second antennas are arranged on the first layer.

The first antenna is a T-shaped dipole antenna, which further includes: a T-shaped radiator, which is located on the second layer of the substrate and includes: a body portion, which is from the ground portion along the first The direction extends to the vicinity of the first edge, a long and narrow groove is formed in the middle of the body part and extends from the end of the body part closer to the first edge along the first direction toward the ground part for a predetermined length, and the two extension parts are respectively Extending a predetermined length from the left and right sides of the end of the body part closer to the first edge along the second direction; a microstrip line, which is located on the first layer of the substrate and adjacent to the narrow groove, the microstrip line The strip line includes: a first elongated portion extending from the ground portion along a direction parallel to the elongated groove to near the first edge, one end of a turning portion connected to one end of the first elongated portion and along the Extending across the long and narrow groove along a second direction, and a second long and narrow portion, one end of which is connected to the other end of the turning portion and extends toward the grounding portion along a direction parallel to the long and narrow groove.

The lengths of the two extensions of the T-shaped radiator are respectively a quarter wavelength of the application frequency band of the first antenna, and the shapes of the two extensions are mutually symmetrical. The length of the long and narrow groove of the T-shaped radiator is a quarter wavelength of the application frequency band of the first antenna. The first and second elongated portions of the microstrip line are respectively a 50 ohm microstrip line and their lengths are respectively a quarter wavelength of the application frequency band of the first antenna, while the length of the turning portion is relatively short, thus substantially making the total length of the microstrip line equal to one-half wavelength of the applied frequency band of the first antenna.

The second antenna includes: an end segment, one end of which is adjacent to the ground portion and protrudes a short length toward the second direction, a first bent segment, one end of which is connected to the other end of the end segment, and Extending a first length along the first direction and toward a direction away from the first edge, one end of a second bending section is connected to the other end of the first bending section and moving toward a direction close to the second edge along the second direction extending a second length, a third bending section whose one end is connected to the other end of the second bending section and extending a third length along the first direction toward a direction close to the first edge, and a fourth bending section One end thereof is connected to the other end of the third bending section and extends along the second direction toward a direction away from the second edge for a fourth length.

A resonant plane of the second antenna is substantially formed between the first and second bent sections of the second antenna and the ground portion, and the third and fourth bent sections and the first and Between the second bending section is substantially a resonant cavity forming the second antenna; and, the total length of the first and second bending sections is one-eighth wavelength of the application frequency band of the second antenna, Moreover, the total length of the third and fourth bent sections is also one-eighth of the wavelength of the application frequency band of the second antenna.

The utility model has the advantages: the gain value of the first antenna of the panel antenna of the utility model in the horizontal direction (Horizontal) can be as high as 3.59dBi, and its gain effect is obviously much higher than -0.79dBi of the prior art. It is conceivable that the panel antenna of the present invention can certainly provide better wireless signal communication quality and transmission efficiency than the prior art. Within the application frequency range of 2.4GHz-2.5GHz, the isolation value between the first antenna and the second antenna of the panel antenna of the present invention can be as low as about -13.42dB. The isolation value of the utility model is not only far better than -6.01dB of the prior art, but also lower than the general market requirement for an isolation value of less than -10dB for high-performance antenna design, which obviously has greatly improved the existing antenna The downside of poor design and poor performance.

Description of drawings

FIG. 1 is a perspective view of a typical wireless network device;

2 is a schematic diagram of a conventional internal circuit device of a MIMO wireless network device;

FIG. 3 is a radiation pattern diagram obtained by testing the first antenna 241 of the existing MIMO antenna unit shown in FIG. 2 on the X-Y plane;

FIG. 4 is a graph showing the isolation obtained by testing between the first antenna and the second antenna in the existing MIMO antenna unit shown in FIG. 2;

5 is a side view of a preferred embodiment of the internal circuit device of the wireless network device with the panel antenna of the present invention;

Fig. 6 is a side view of the soldering tin of a preferred embodiment of the internal circuit device in the wireless network device with the panel antenna of the present invention;

FIG. 7 is an enlarged schematic view of the panel antenna of the present invention in the wireless network device shown in FIG. 5 and FIG. 6;

Fig. 8 is the first antenna in the panel antenna of the present invention as shown in Fig. 5 and Fig. 6 and is tested on the X-Y plane and obtains the radiation pattern diagram;

FIG. 9 is a curve diagram of the isolation obtained by testing between the first antenna and the second antenna in the panel antenna of the present invention as shown in FIG. 5 and FIG. 6 .

Explanation of reference signs: 10~wireless network device; 11~body; 12~internal circuit device; 13~connector part; 14~antenna signal transceiver part; 20~existing internal circuit device; 21~substrate; 22~control circuit ;23～grounding part; 24～antenna unit; 241～first antenna; 242～second antenna; 243～third antenna; 251, 252, 253～feeding line; 50～wireless network device; 51～substrate; ~first layer; 512~second layer; 513~first edge; 514~second edge; 515~third edge; 52~control circuit; 53~grounding part; 531~front edge; 532~first side edge ; 533～second side edge; 534～first rear edge; 535～second rear edge; 541, 542, 543～feed line; 60～panel antenna; 61～first antenna; 611～radiator; 612～ Microstrip line; 613, 613a ~ body part; 614 ~ narrow groove; 615, 616 ~ extension part; 617 ~ first long and narrow part; 618 ~ turning part; 619 ~ second long and narrow part; 62 ~ second antenna; 621 ~ End section; 622~the first bending section; 623~the second bending section; 624~the third bending section; 625~the fourth bending section; 63~the third antenna.

Detailed ways

Please refer to FIG. 5 to FIG. 7 , which disclose a preferred embodiment of the panel antenna 60 and the wireless network device 50 having the panel antenna 60 of the present invention. Wherein, Fig. 5 and Fig. 6 are the circuit component side (Component Side) diagram and the solder side (Solder Side) diagram of a preferred embodiment of its internal circuit device in the wireless network device 50 having the panel antenna 60 of the present invention respectively picture. FIG. 7 is an enlarged schematic view of the panel antenna 60 of the present invention in the wireless network device 50 shown in FIGS. 5 and 6 .

As shown in FIG. 5 , a preferred embodiment of the wireless network device 50 with the panel antenna 60 of the present invention includes: a substrate 51 , a control circuit 52 , a grounding portion 53 , and a panel antenna 60 .

The substrate 51 is made of dielectric material and is a flat rectangular substrate 51 . In a preferred embodiment, the substrate 51 may be an FR4 circuit board. On the substrate 51, there is a circuit component side surface (hereinafter also referred to as the first layer 511 or the upper surface) with a plurality of electronic circuit components, and a solder side surface (hereinafter also referred to as the second layer 512 or the upper surface) with a plurality of solder points. lower surface, as shown in Figure 6). The first layer 511 (and the second layer 512) of the substrate 51 are defined with a first direction (X direction) and a second direction (Y direction) perpendicular to each other, and the substrate 51 has at least one A first edge 513 perpendicular to the first direction, a second edge 514 and a third edge 515 perpendicular to the second direction, the second edge 514 and the third edge 515 are respectively connected to two ends of the first edge 513 .

The control circuit 52 is disposed on the first layer 511 of the substrate 51 and includes several integrated circuit components and most electronic components, which can provide wireless network transmission function. Since the control circuit 52 described here can be used in the prior art and is not the main technical feature of the present invention, its detailed structure will not be described in detail below.

The ground part 53 is electrically grounded (GND) and covers at least a part of the first and second layers 511, 512 of the substrate 51, especially covers the first layer 511 and is adjacent to the panel antenna of the present invention. 60 , and widely cover most of the other areas of the second layer 512 except for the position corresponding to the panel antenna 60 . In addition to providing the electrical grounding function, the grounding portion 53 can also provide a frequency resonance function with the panel antenna 60 of the present invention. In a preferred embodiment of the present utility model, the ground portion 53 is separated from the first edge 513 by a first interval (not numbered) in the first direction (X direction), and In the second direction (Y direction), there is a second distance (not numbered) from the second edge 514 and a third distance (not numbered) from the third edge 515 . Moreover, in the area adjacent to the panel antenna 60 , the areas covered by the ground portion 53 on the two layers 511 , 512 correspond to each other and have the same outline.

The panel antenna 60 is arranged on the base plate 51 and not covered by the grounding part 53, and the panel antenna 60 is connected to the control circuit 52 through a plurality of feed-in lines 541, 542, 543 to provide a wireless signal transceiving function . In a preferred embodiment of the present invention, the panel antenna 60 further includes: a first antenna 61 , a second antenna 62 , and a third antenna 63 . The first antenna 61 extends from a front edge 531 of the ground portion 53 toward the first edge 513 and is located in the first interval, and the second antenna 62 faces from a first side edge 532 of the ground portion 53 . The second edge 514 is extended to be located in the second interval, and the third antenna 63 is extended from a second side edge 533 of the ground portion 53 toward the third edge 515 to be located in the third interval. The grounding portion 53 on the first layer 511 has a first rear edge 534 extending from the tail end of the first side edge 532 to the second edge 514, and extending from the tail end of the second side edge 533 To the second trailing edge 535 at the third edge 515 . As shown in FIG. 5 , the edges 531 - 535 of the ground portion 53 substantially form a ladder-like structure. On both sides of the front edge 531 of the grounding portion 53, an ungrounded direction defined by the first side edge 532 and the first rear edge 534, and the second side edge 533 and the second rear edge 535 is formed respectively. Block-shaped area, and the second antenna 62 and the third antenna 63 are respectively located in the aforementioned ungrounded area defined by the first side edge 532 and the first rear edge 534 and by the second side edge 533 and the first rear edge 534 In the ungrounded area defined by the two trailing edges 535 . In this way, not only the second antenna 62 and the third antenna 63 are substantially isolated by the ground portion 53, but also the first antenna 61 and the second antenna 62 (or the third antenna 63) can be grounded. Section 53 to provide some isolation effect.

As shown in FIG. 5 and FIG. 6 , the first antenna 61 is a T-Dipole Antenna (T-Dipole Antenna) and further includes: a T-shaped radiator 611 and a microstrip line 612 . The T-shaped radiator 611 is located on the second layer 512 of the substrate 51 and includes: a body portion 613 , a long and narrow groove 614 , and two extension portions 615 , 616 . The body portion 613 extends from the ground portion 53 along the first direction to a place adjacent to the first edge 513 . The long and narrow groove 614 is formed in the middle of the body portion 613 and extends for a predetermined length from an end of the body portion 613 closer to the first edge 513 along the first direction toward the ground portion 53 . The two extending portions 615 , 616 respectively extend a predetermined length from the left and right sides of the end of the body portion 613 closer to the first edge 513 along the second direction. The body portion 613 of the T-shaped radiator 611 is connected to the ground portion 53 on the second layer 512 . On the first layer 511 and adjacent to the area around the microstrip line 612 , there is another body portion 613 a corresponding to the body portion 53 of the second layer 512 and having the same outline. The other body portion 53 is connected to the ground portion 53 on the first layer 511 .

The microstrip line 612 is located on the first layer 511 of the substrate 51 and adjacent to the slot 614 . The microstrip line 612 includes: a first elongated portion 617 , a turning portion 618 , and a second elongated portion 619 . The first elongated portion 617 extends from the ground portion 53 along a direction parallel to the elongated groove 614 to a place adjacent to the first edge 513 . One end of the turning portion 618 is connected to one end of the first elongated portion 617 and extends across the elongated groove 614 along the second direction. One end of the second elongated portion 619 is connected to the other end of the turning portion 618 and extends toward the ground portion 53 along a direction parallel to the elongated groove 614 . Since the body part 613 and the extension parts 615, 616 extending from its end to both sides visually form a T-like shape, the cooperation of the microstrip line 612 and the T-shaped radiator 611 can have a dipole Antenna (Dipole Antenna) characteristics, so it is called T-shaped dipole antenna.

Please refer to FIG. 5 again. In this preferred embodiment, since the second antenna 62 and the third antenna 63 are substantially symmetrical to each other, they are respectively arranged on opposite sides of the first antenna 61, and the second antenna 63 The shapes of the second antenna 62 and the third antenna 63 substantially correspond to each other. Therefore, only the structure of the second antenna 26 will be described below, and the structure of the third antenna 63 will not be repeated.

In this preferred embodiment, the second antenna 62 includes: an end section 621, a first bending section 622, a second bending section 623, a third bending section 624, and a first Four bending sections 625. One end of the end segment portion 621 is adjacent to the first side edge 532 of the ground portion 53 and protrudes a short length toward the second direction. One end of the first bent section 622 is connected to the other end of the end section 621 and extends along a first direction and away from the first edge 513 for a first length. One end of the second bent section 623 is connected to the other end of the first bent section 622 and extends along a second direction toward a direction close to the second edge 514 by a second length. One end of the third bending section 624 is connected to the other end of the second bending section 623 and extends a third length along the first direction towards the direction close to the first edge 513 . One end of the fourth bending section 625 is connected to the other end of the third bending section 624 and generally extends a fourth length along the second direction toward a direction away from the second edge 514 . As can be seen from FIG. 5 , the first to fourth bent sections 622 - 625 of the second antenna 62 can form a D-shaped antenna structure. Wherein, between the first and second bent sections 622, 623 of the second antenna 62 and the first side edge 532 and the first rear edge 534 of the ground portion 53 substantially forms a part of the second antenna 62. resonance surface. The D-shaped region formed between the third and fourth bending sections 624, 625, and the first and second bending sections 622, 623 essentially forms a resonance of the second antenna 62. cavity to provide good antenna performance.

Please refer to FIG. 7 , the panel antenna 60 of the present invention can change the bandwidth or frequency band of its application frequency band by adjusting the length or bending mode of different parts of the antennas 61 , 62 , 63 . For example, by adjusting the length of the long and narrow groove 614 of the first antenna 61, the depth of the frequency bandwidth of the first antenna 61 can be determined. The length of the second elongated portion 619 can change the frequency band of the application frequency band of the first antenna 61 . As another example, by adjusting the lengths of the first and second bent sections 622, 623 of the second antenna 62 (or the third antenna 63), it can be used to determine the frequency of the application frequency band of the second antenna 62 (or the third antenna 63). As for the length and position of the third bending section 624, it can be used to adjust the frequency band of its application frequency band.

If taking the wireless network device 50 applicable to the wireless local area network (WLAN) conforming to the 802.1g standard as an example, the application frequency band of the panel antenna 60 needs to fall within the range of 2.4GHz˜2.5GHz. In a preferred embodiment, the length and relative position of each antenna 61, 62, 63 in the panel antenna 60 of the present utility model can be designed in the following manner: 1. the T-shaped radiator 611 of the first antenna 61 The lengths of the two extensions 615, 616 (measured from the end of the long and narrow groove 614) are respectively about a quarter wavelength of the application frequency band of the first antenna 61, and the shapes of the two extensions 615, 616 are mutually symmetry.

2. The total length of the slot 614 of the T-shaped radiator 611 of the first antenna 61 is about a quarter of the wavelength of the application frequency band of the first antenna 61 .

3. The first and second elongated parts 617, 619 of the microstrip line 612 of the first antenna 61 are respectively a 50 ohm microstrip line and its length is about four times the application frequency band of the first antenna 61. 1/1 wavelength, and the length of the turning portion 618 is relatively short, so the total length of the microstrip line 612 is substantially equal to 1/2 the wavelength of the application frequency band of the first antenna 61 .

4. The connection points of the feed lines 542, 543 and the second antenna 62 and the third antenna 63 are respectively called the feed points of the second antenna 62 and the third antenna 63, while the feed points of the first antenna 61 are It is located at the position where the turning portion 618 straddles the narrow groove 614 . At this time, the distance between the feeding point of the first antenna 61 and the feeding point of the second antenna 62 is about a quarter wavelength of the application frequency band of the first antenna 61 .

5. In the second antenna 62, the total length of the first and second bent sections 622, 623 is about one-eighth of the wavelength of the application frequency band of the second antenna 62, and the third and second The total length of the four bent sections 624 and 625 is about one-eighth of the wavelength of the application frequency band of the second antenna 62 .

In addition, in a preferred embodiment of the present invention, the feeding lines 541 , 542 , 543 can use 50 ohm microstrip lines to obtain better power transfer functions.

As shown in FIGS. 5 to 7 , through the unique design of the panel antenna 60 of the present invention, the second antenna 62 and the third antenna 63 are isolated by the grounding portion 53 . And, the radiator 611 of the first antenna 61 (T-shaped dipole antenna) itself, and the ground portion between the first antenna 61 and the second antenna 62 will also improve the height of the two adjacent antennas 61, Good isolation effect between 62. In addition, the utility model adopts the design of the T-shaped dipole antenna (the first antenna 61) and the two monopole antennas (the second and the third antenna 62, 63) extending in different directions on both sides, which can also be better on the X-Y plane. The radiation pattern and higher gain can greatly improve the antenna performance.

Please refer to Fig. 8 and Fig. 9, wherein, Fig. 8 is a radiation pattern diagram obtained by testing the first antenna 61 in the panel antenna 60 of the present invention as shown in Fig. 5 and Fig. 6 on the X-Y plane; and FIG. 9 is a graph showing the isolation (Isolation) obtained from the test between the first antenna 61 and the second antenna 62 in the panel antenna 60 of the present invention as shown in FIGS. 5 and 6 .

As can be seen from the radiation pattern diagram of Fig. 8, the gain value of the first antenna 61 of the flat panel antenna 60 of the present invention in the horizontal direction (Horizontal) can be as high as 3.59dBi, and its gain effect is obviously like the present one shown in Fig. 2 The technical -0.79dBi is much higher. It is conceivable that the panel antenna 60 of the present invention can certainly provide better wireless signal communication quality and transmission efficiency than the conventional technology. It can be seen from the isolation curve in Fig. 9 that the isolation value between the first antenna 61 and the second antenna 62 of the panel antenna 60 of the present invention can be as low as About -13.42dB. The isolation value of the utility model is not only far better than -6.01dB of the conventional technology shown in Figure 2, but also lower than the requirement of the general market for the isolation value of high-efficiency antenna design to be lower than -10dB, obviously already Significantly improve the shortcomings of conventional antenna design and poor performance.

However, the above-mentioned embodiments should not be used to limit the applicable scope of the present utility model. For example, the first antenna 61 of the present invention is not limited to the above-mentioned T-shaped dipole antenna, and it may also be other types of dipole antennas, monopole antennas, or PIFA antennas. As another example, the second and third antennas 62 and 63 of the present invention are not limited to monopole antennas, and they can also be PIFA antennas. Therefore, the scope of protection of the utility model should be based on the technical spirit defined by the content of the patent application for the utility model and the range covered by equal changes. That is to say, all equal changes and modifications made according to the patent scope of the utility model will still not lose the gist of the utility model, nor depart from the spirit and scope of the utility model, so all should be regarded as further implementation of the utility model situation.

Claims (10)

1. one kind is applicable to the plate aerial on the radio network device, it is characterized in that, includes:

One substrate is that definition has an orthogonal first direction and a second direction on an aspect of described substrate, and described substrate and have one first edge vertical with described first direction and one second edge vertical with described second direction at least;

One grounding parts, it is a part of zone that is covered in described substrate aspect electrical ground and at least, and described grounding parts is in being to be separated by one first at interval and be to be separated by one second at interval with second edge with described first edge on described second direction on the described first direction;

One first antenna is to extend setting and be positioned at described first at interval towards described first edge from grounding parts;

One second antenna is to extend setting and be positioned at described second at interval towards described second edge from grounding parts.

2. the plate aerial that is applicable on the radio network device as claimed in claim 1, it is characterized in that: more include a third antenna, it is to be positioned at the opposite side of grounding parts with respect to second antenna, making second antenna and third antenna is to be subjected to grounding parts to isolate, and the shape of described third antenna comes down to the shape corresponding to second antenna.

3. the plate aerial that is applicable on the radio network device as claimed in claim 1 is characterized in that: described first antenna is to be a dipole antenna, and described second antenna is to be a unipole antenna.

4. the plate aerial that is applicable on the radio network device as claimed in claim 3, it is characterized in that: described substrate is to have one first relative aspect and one second aspect, on described two aspects, be to be provided with grounding parts respectively, and the zone that grounding parts is covered on two aspects is that mutual correspondence and profile phase are same, and described first and second antenna is to be arranged on first aspect.

5. the plate aerial that is applicable on the radio network device as claimed in claim 4 is characterized in that: described first antenna is to be a T type dipole antenna, and it more includes:

One T type radiant body, it is to be positioned on second aspect of substrate and is to comprise: a body its be from grounding parts extend to along first direction vicinity, contiguous first edge, a long and narrow ditch be formed in the middle of the body and be from the end at nearer first edge of body along first direction towards grounding parts extend a predetermined length and two extensions its be respectively from about the end at nearer first edge of body two sides extend a predetermined length along being parallel to second direction;

One microstrip line, it is to be positioned on first aspect of substrate and the position of contiguous long and narrow ditch, and described microstrip line is to have to comprise: one first long and narrow it be that to extend to vicinity, contiguous first edge, a turning point one end be to be connected in first long and narrow one end and be to extend across described long and narrow ditch and second long and narrow one end is to be connected in the other end of turning point and is to extend to grounding parts along the direction that is parallel to long and narrow ditch along second direction along the direction that is parallel to long and narrow ditch from grounding parts.

6. the plate aerial that is applicable on the radio network device as claimed in claim 5, it is characterized in that: the length of two extensions of described T type radiant body is the quarter-wave that is respectively the application frequency band of described first antenna, and the shape of described two extensions is symmetrical.

7. the plate aerial that is applicable on the radio network device as claimed in claim 5 is characterized in that: the length of the long and narrow ditch of described T type radiant body is the quarter-wave for the application frequency band of described first antenna.

8. the plate aerial that is applicable on the radio network device as claimed in claim 5, it is characterized in that: the long and narrow portion of first and second of described microstrip line is respectively the quarter-wave that one 50 ohm microstrip and its length are respectively the application frequency band of described first antenna, the length of described turning point is then shorter relatively, therefore comes down to make that the total length of described microstrip line equals 1/2nd wavelength of the application frequency band of described first antenna.

9. the plate aerial that is applicable on the radio network device as claimed in claim 3 is characterized in that: described second antenna is to have to comprise: an end section portion one end is to abut in grounding parts and is towards a bit of length of second direction projection, one first bending segment one end is to connect the other end of described end section portion and along first direction and towards extend one first length away from the direction at first edge, one second bending segment one end be connect the other end of first bending segment and along second direction towards extend one second length near the direction at second edge, one the 3rd bending segment one end be connect the other end of second bending segment and along first direction towards extend one the 3rd length near the direction at first edge, and one the 4th bending segment one end be connect the other end of the 3rd bending segment and along second direction towards extend one the 4th length away from the direction at second edge.

10. the plate aerial that is applicable on the radio network device as claimed in claim 9, it is characterized in that: a resonance surface that comes down to form second antenna between first and second bending segment of described second antenna and the described grounding parts, and, come down to form a resonant cavity of second antenna between the described the 3rd and the 4th bending segment and first and second bending segment; And the length of described first and second bending segment adds up to 1/8th wavelength of the application frequency band of described second antenna, and the length of the described the 3rd and the 4th bending segment adds up to 1/8th wavelength of the application frequency band that also is described second antenna.

Images