CN100356630C - Microstrip Dual Frequency Horn Antenna - Google Patents
Microstrip Dual Frequency Horn Antenna Download PDFInfo
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- CN100356630C CN100356630C CNB031008526A CN03100852A CN100356630C CN 100356630 C CN100356630 C CN 100356630C CN B031008526 A CNB031008526 A CN B031008526A CN 03100852 A CN03100852 A CN 03100852A CN 100356630 C CN100356630 C CN 100356630C
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Abstract
A microstrip dual-frequency horn antenna comprises a printed circuit board provided with a control circuit required by a wireless electronic product and other parts required to be installed; a horn antenna made on one surface of the printed circuit board in the form of metal micro-strip, wherein one side edge of the horn antenna is provided with a horn-shaped opening, two side edges of the opening form an included angle, and a strip-shaped opening is connected to the base of the included angle; and the metal microstrip line is manufactured on the other surface of the printed circuit board opposite to the surface in a metal microstrip mode and used as a feed-in transmission line of an electric wave signal, one end of the metal microstrip line is connected with the control circuit printed on the other surface of the printed circuit board, the other end of the metal microstrip line extends to a position corresponding to one side edge of the long-strip-shaped opening, is bent by 90 degrees, spans the position corresponding to the long-strip-shaped opening, and then is bent by 90 degrees and approximately symmetrically extends to the opposite side of the position corresponding to one side edge of the long-strip-shaped opening.
Description
Technical field
The present invention relates to a kind of microstrip antenna, more particularly, relate to the double-frequency micro-strip antenna that a kind of manufacturing technology of utilizing printed circuit is made, this double-frequency micro-strip antenna is the bugle shape (in the following description of the present invention, be referred to as horn antenna), make its height double frequency-band all have enough effective frequency ranges, the system effectiveness of the wireless electronic product of this double-frequency micro-strip antenna is installed with effective lifting.
Background technology
In recent years, because the market demand of mobile communication product heightens, make that the development of wireless lan (wlan) is more quick, in the standard of numerous WLAN (wireless local area network), the most noticeable person's is the agreement of IEEE802.11 WLAN (wireless local area network), IEEE 802.11 agreements were formulated in 1997, this agreement not only provides WLAN (wireless local area network) many unprecedented functions in communication, but also the solution that provides the wireless product that can make various different manufacturers productions to be communicated with each other, the formulation of this agreement has been opened a new milestone for the development of WLAN (wireless local area network) undoubtedly, in addition, the solution with core apparatus fill order wafer has also been determined in this agreement, effectively reduce and adopt the required cost of wireless technology, make WLAN (wireless local area network) be widely used in the various radio mobile communication products.
The IEEE802.11 agreement is in version in 1997, mainly be physical layer (phyical) and medium access control layer (Media Access Control to the networking, abbreviation MAC) carries out standard, so that the wireless product that each producer produced, not only can on same physical layer, communicate with each other, and its LLC (Logical Link Control, be called for short LLC) also be consistent, promptly medium access control layer (MAC) is following is transparent to networking application (Network Application).During in August, 2000, IEEE makes 802.11 agreements become a combination with standard between IEEE/ANSI and ISO/IEC, it has been done further revision, its Description of Revision is except comprising with a built-in simple NM network management agreement (Simple NetworkManagement Protocol, abbreviation SNMP) overhead station (Management InformationBase, be called for short MIB), replace outside the MIB of original built-in OSI agreement, other has increased the new content of binomial:
(1) IEEE 802.11a agreement: the physical layer of standard has been expanded in this agreement, stipulates the frequency band of this layer use 5GHz, and orthogonal frequency division modulation data is adopted in this agreement, and the transmission rate scope is 6Mbps-54Mbps, to satisfy the application of indoor at present and outdoor wireless telecommunications.
(2) IEEE 802.11b agreement: this agreement is another expansion of 802.11 agreements, its regulation physical layer adopts the 2.4GHz frequency band, modulator approach adopts compensation codes Keyboard Control (CKK), CKK derives from direct sequence spread spectrum skill, when the medium access of many speed control (MAC) is used to guarantee that long or interference is too big when the distance between work station, transmission rate can drop to 5.5Mbps automatically from 11Mbps, perhaps adjusts to 2Mbps and 1Mbps according to direct sequence spread spectrum skill.
Regulation according to IEEE 802.11a and the agreement of 802.11b WLAN (wireless local area network), in the standard physical layer of expansion, its working band must be separately positioned on 5GHz and 2.4GHz, so when a wireless electronic product desires to use simultaneously these two kinds of WLAN (wireless local area network) agreements, based on the requirement on the frequency band, just a plurality of antennas must be installed, yet, this measure has not only increased the cost of part, installation procedure, more need on wireless electronic product, to vacate more space, so that these antennas to be installed, this will cause the volume of wireless electronic product to dwindle easily, to meet compact designer trends.
Therefore, in recent years, the design of many radio communication products and producer, when the so-called double frequency electronic product of research and development, all desire to develop a kind of dual-band antenna that two working bands can be provided, so that when being used in dual-band antenna on the radio communication product, can effectively reduce the quantity of antenna and shared space thereof, and the dual-band antenna of being seen on the market at present, no matter be chip type antenna (Chip Antenna), still the microstrip antenna (Printed Antenna) that utilizes printing technology to make, the performance on working band 5GHz, all not ideal enough, in addition, though have the part antenna to meet requirement on the characteristic, the size of antenna is too huge, causes the unnecessary waste of installing space.In addition, because these dual-band antennas are the independent component of processing and fabricating separately, and additionally are installed on the radio communication product with the pattern of spare part, so obviously need to increase extra making, processing and assembly cost, not only do not meet cost benefit, do not meet the requirement of automated production yet.
Traditionally, one physical form is the antenna of bugle shape, be the design of radio communication product and the traditional antenna 10 that the producer was familiar with, as shown in Figure 1, this antenna 10 is commonly referred to as horn antenna, its electric wave signal is by coaxial wire 11 feed-ins, because this kind antenna 10 has the frequency range broad, antenna gain is higher, and plurality of advantages such as polarised direction is comparatively obvious, so often be used in the laboratory, as the field pattern of measuring general antenna or the standard antenna of gain, yet, because the size of this kind antenna 10 is too huge, and costing an arm and a leg, so this traditional horn antenna and be not suitable for and can not be applied on the product of general wireless telecommunications.
And, many dealers were also once arranged, at this tradition horn antenna 10, utilize the manufacturing technology of printed circuit board (PCB), little belt shape of its equivalence is produced on the circuit board 9, as shown in Figure 2, and the design of the feed-in by different transmission lines, simulate the characteristic of the traditional horn antenna 10 of this kind, produce the microstrip type horn antenna 20 of many different styles, though this kind microstrip type horn antenna 20 has still kept the part characteristic of traditional horn antenna 10 shown in Fig. 1, but its characteristic will be because of employed transmission line 21 or the framework 22 that is mated, and different, and these microstrip type horn antennas 20 generally are single band designs, and can't be used on the radio communication product that needs two working bands.
As for, modal on the market at present dual-band antenna, chip type antenna 30 (ChipAntenna) as shown in Figure 3, its framework is the microstrip antenna 32 of printing required form on ceramic substrate 31, again this chip type antenna 30 is mounted on the circuit board 9, utilize microstrip line 33 on it as the feed-in transmission line of electric wave, generally speaking, this chip type antenna 30 is comparatively narrow at effective frequency range of high frequency treatment, can't satisfy the desired working band width of wireless electronic product system, and the antenna gain of these chip type antennas 30 is not high, is its common shortcoming yet.In addition, when being mounted to it on wireless electronic product, also need increase extra part, processing and assembly cost, therefore, use these chip type antennas 30 on wireless electronic product, be not a desirable selection.
Because that aforementioned conventional chip type dual-band antenna has a frequency range is narrower, antenna gain is not high, and the shortcoming that making and installation cost are higher, creator among the present invention is engaged in the technical experience that antenna is made for many years according to it, and the professional knowledge of being accumulated, at above-mentioned disappearance, through the various solutions of concentrating on studies, and through constantly research, experiment and improvement, finally development and Design goes out a kind of microstrip-type double frequency horn antenna, this horn antenna can directly utilize the manufacturing technology of printed circuit, when making the printed circuit board (PCB) of a wireless electronic product, in the lump horn antenna is produced on the surface of printed circuit board (PCB), reduce cost of manufacture with big spoke, and make this horn antenna on two frequency bands, all have enough effective frequency ranges, with the system effectiveness of effective lifting wireless electronic product.
Summary of the invention
The main purpose of microstrip-type double frequency horn antenna is that to have a frequency range narrower in order to solve existing chip type dual-band antenna among the present invention, and antenna gain is not high, and making and installation cost problem of higher.
Microstrip-type double frequency horn antenna among the present invention comprises:
One printed circuit board (PCB) is laid with other parts of required control circuit of a wireless electronic product and required installation on this printed circuit board (PCB);
One horn antenna, this horn antenna is produced on the surface of described printed circuit board (PCB) with the pattern of metal micro-strip, one side edge of this horn antenna is provided with an opening that is the bugle shape, and the both sides of the edge of this opening form an angle, at the continue opening of a strip of the base portion of this angle;
One metal micro-strip line, this metal micro-strip line is produced on another surface relative with above-mentioned surface of described printed circuit board (PCB) with the pattern of metal micro-strip, feed-in transmission line as the electric wave signal, the control circuit of being printed on described another surface of one end and described printed circuit board (PCB) is connected, the other end extends to the lateral margin position corresponding to the strip opening, and with 90 degree bendings, behind the position of leap corresponding to the strip opening, again with 90 degree bendings, the rough opposite side that extends to symmetrically corresponding to this lateral margin position of strip opening.
Microstrip-type double frequency horn antenna among the present invention is in the mode of electric wave coupling, utilize a microstrip line of another surperficial made on the printed circuit board (PCB), as its feed-in transmission line, and by the bugle length of adjusting horn antenna, control the position of two frequency bands, or by the size of adjusting the bugle angle, gain with control antenna, or by the coupling area of adjusting between itself and microstrip line, controlling the coupling of its low-and high-frequency interband, thereby design one simple in structurely, be easy to make, can reduce production costs, and can satisfy the microstrip-type double frequency horn antenna of product specification demand.
In addition, the double frequency horn antenna among the present invention by adjusting the size of this another microstrip line, is effectively controlled frequency band by have additional another microstrip line that can be used for adjusting frequency band at the bugle opening edge, makes its high frequency band can obtain better matching value.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment among the present invention is described in further detail.
Fig. 1 is the three-dimensional appearance schematic diagram of traditional horn antenna;
Fig. 2 is the three-dimensional appearance schematic diagram of traditional microstrip type horn antenna;
Fig. 3 is the three-dimensional appearance schematic diagram of conventional wafer type dual-band antenna;
Fig. 4 is the floor map of microstrip-type double frequency horn antenna among the present invention;
Fig. 5 is the cross-sectional schematic of the double frequency of microstrip-type shown in Fig. 4 horn antenna along the X-X line;
Fig. 6 is the floor map of microstrip-type double frequency horn antenna in a preferred embodiment of the present invention;
Fig. 7 is the floor map of microstrip-type double frequency horn antenna in another preferred embodiment of the present invention;
Fig. 8 is the measured data schematic diagram of the double frequency of microstrip-type shown in Fig. 6 horn antenna;
Fig. 9 is the measured data schematic diagram of the double frequency of microstrip-type shown in Fig. 7 horn antenna.
Embodiment
As Fig. 4, Fig. 5 and shown in Figure 6, microstrip-type double frequency horn antenna 40 is manufacturing technologies of utilizing printed circuit among the present invention, when making the printed circuit board (PCB) 9 of a wireless electronic product, direct pattern with metal micro-strip, horn antenna 40 is produced in the lump on the appropriate location on these printed circuit board (PCB) 9 one surfaces, be provided with an opening 41 that is the bugle shape at a side edge of this horn antenna 40, it is the angle of α that the both sides of the edge 411 of this bugle shape opening 41 form an angle, the length of its both sides of the edge 411 is respectively L3, at the continue opening 42 of a strip of the base portion of angle α, the length of this strip opening 42 is L2, this strip opening 42 forms alleged bugle among the present invention with this bugle shape opening 41, and its length is L2+L3.On printed circuit board (PCB) 9 corresponding to another surface of this strip opening 42, printing is manufactured with a metal micro-strip line 43, this microstrip line 43 is as the feed-in transmission line of electric wave signal, the control circuit (not shown) of being printed on one end another surface relative with above-mentioned surface with printed circuit board (PCB) 9 is connected, the other end then extends to the lateral margin position corresponding to strip opening 42, and with 90 degree bendings, behind the position of leap corresponding to strip opening 42, again with 90 degree bendings, the rough opposite side that extends to symmetrically corresponding to this lateral margin position of strip opening 42.So, microstrip line 43 can via strip opening 42 positions, be coupled to the electric wave signal that control circuit produced on the horn antenna 40, to increase the effect of signal feed-in.
By design of the present invention, the practice that not only can replace conventional coaxial cable feed-in electric wave by metal micro-strip line 43, and can be when making printed circuit board (PCB) 9, directly with horn antenna 40, control circuit and microstrip line 43, pattern with metal micro-strip, be produced in the lump on the printed circuit board (PCB) 9, therefore not only simple in structure, be easy to make, and can effectively reduce production costs, make the horn antenna of producing, can on two frequency bands, all have enough effective frequency ranges, thereby promoted the system effectiveness of wireless electronic product effectively.In addition, according to the present invention, when making horn antenna 40, also can be according to actual demand, by the bugle length of adjusting horn antenna 40, control the position of two frequency bands, or, come the control antenna gain, or by the coupling area of adjusting 43 of strip opening 42 and microstrip lines by the size of adjusting bugle angle α, to control the coupling of its low-and high-frequency interband, make the designed horn antenna 40 that goes out to satisfy the specification demand of product.
In a preferred embodiment of the present invention, as shown in Figure 6, input impedance value with the microstrip line 43 of this horn antenna 40, fixedly be made as 50 ohm, and be W1 with the width setup of this microstrip line 43, when the other end of this microstrip line 43 extends to a lateral margin position corresponding to strip opening 42, and with 90 whens bending degree, its width becomes W2, at the correspondence position of crossing over strip opening 42, again with after the 90 degree bendings, when this microstrip line 43 extended to corresponding to another lateral margin position of strip opening 42 symmetrically, its width became W3, the width W 1 of these microstrip lines 43, W2 and W3, when meeting following condition, its coupling effect is best:
(1) width W 2 is between 1 of one times to three times width W, i.e. 1*W1＜W2＜3*W1;
(2) width W 3 is between 2 of width W 1 and width W, i.e. W1≤W3≤W2.
As for, when design double frequency horn antenna 40, the width W 4 of strip opening 42 is between 1 of one times to two times microstrip line 43 width W, be 1*W1＜W4＜2*W1, the bugle length L 2+L3 of this dual-band antenna then is designed to approximate 1/4th (1/4) length of the effective wavelength of its low-frequency resonance frequency, and the ratio that L2 and L are 3 is between 0.7 and 1.3, i.e. 0.7＜L2/L3＜1.3, the bugle angle [alpha] of this dual-band antenna then between between 10 to 60 degree, i.e. 10＜α＜60.
Design condition according to aforementioned horn antenna 40, microstrip line 43 is at the opposite side that extends to symmetrically corresponding to this lateral margin position of strip opening 42, and when its width becomes W3, its length L 1 should maintain 0. 6 times to 14 times 2 of length L as much as possible, be 0.6*L2＜L1＜1.4*L2, so, when microstrip line 43 is fed on the horn antenna 40 in the coupling of electric wave signal, will produce preferable signal feed-in effect.
In another preferred embodiment of the present invention, as shown in Figure 7, the bugle shape opening 41 edge places of the horn antenna 40 in aforementioned preferred embodiment are provided with another microstrip line 44, described another microstrip line 44 is extended by the opposite side direction of the described opening edge of a side direction of the opening edge of described bugle shape opening 41, with size by another microstrip line 44 of adjustment, be its length L 5 and width L6,, make it can obtain the better matching value to control the coupling of its high frequency band.The length L 5 of this another microstrip line 44 is with less than the distance L 4 between the opening edge of the both sides of the edge of the bugle shape opening 41 of 0.8 times horn antenna 40, and promptly 0＜L5/L4＜0.8 is the best.
The present invention is according to the design condition of aforementioned most preferred embodiment, on respectively that horn antenna 40 actual fabrication to two are the different printed circuit board (PCB)s 9, utilize again and detect frequency and impedance instrument, after it is detected, its testing result will be as Fig. 8 and shown in Figure 9, wherein the testing result of the horn antenna 40 of another microstrip line 44 is arranged for bugle shape opening 41 edge designs shown in Fig. 8, by shown in Fig. 8 as can be known this horn antenna 40 near frequency band is respectively 5GHz and 2.4GHz, good frequency response is arranged, so when an electronic product desires to use simultaneously two kinds of WLAN (wireless local area network) agreements, can utilize the present invention, this horn antenna 40 directly is printed on a side of printed circuit board (PCB) 9, make microstrip line 43 and control circuit at its opposite side, thereby produce one simple in structure easily, and have the horn antenna 40 of two enough frequency ranges simultaneously, thereby promoted the system effectiveness of wireless electronic product effectively.
As shown in Figure 9, shown in this Fig is that the design of bugle shape opening 41 edge has the horn antenna 40 of another microstrip line 44 to utilize detection frequency and impedance instrument, testing result after it is detected, by shown in Fig. 9 as can be known, this horn antenna 40 not only has good response near frequency band is respectively 5GHz and 2.4GHz, and, can obtain better matching value because the design of another microstrip line 44 more makes it at high frequency partly.
According to the above, the present invention can utilize the manufacturing technology of printed circuit, when making the printed circuit board (PCB) 9 of wireless electronic product, directly horn antenna 40 is produced on the surface of printed circuit board (PCB) 9 in the lump, significantly to reduce the cost of manufacture of antenna, and make it all have enough frequency ranges, with the system effectiveness of effective lifting wireless electronic product at two frequency band places of height.In addition, the feed-in transmission line of horn antenna 40 also can utilize the manufacturing technology of printed circuit, is produced on another surface of printed circuit board (PCB) 9, to omit traditional coaxial cable feed-in line.In addition, the present invention is when making horn antenna 40, still can be by the size of adjusting its bugle length, corner dimension, coupling area and another microstrip line 44, coupling with position, antenna gain and the low-and high-frequency interband of two frequency bands of effective control, make the designed horn antenna of producing 40, not only simple in structure, be easy to make, and can reduce production costs, satisfy the specification demand of product.
Though above-mentioned preferred embodiment among the present invention is described; but can not be as protection scope of the present invention; promptly should be understood that to those skilled in the art; do not breaking away from variation and the modification that to make equivalence under the design spirit of the present invention to it; therefore; every not breaking away from the equivalence variation of having done under the design spirit of the present invention and modification, all should think to fall into protection scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031008526A CN100356630C (en) | 2003-01-23 | 2003-01-23 | Microstrip Dual Frequency Horn Antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031008526A CN100356630C (en) | 2003-01-23 | 2003-01-23 | Microstrip Dual Frequency Horn Antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1519987A CN1519987A (en) | 2004-08-11 |
| CN100356630C true CN100356630C (en) | 2007-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031008526A Expired - Fee Related CN100356630C (en) | 2003-01-23 | 2003-01-23 | Microstrip Dual Frequency Horn Antenna |
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| Country | Link |
|---|---|
| CN (1) | CN100356630C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201320468A (en) * | 2011-11-03 | 2013-05-16 | Compal Electronics Inc | Slot antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519408A (en) * | 1991-01-22 | 1996-05-21 | Us Air Force | Tapered notch antenna using coplanar waveguide |
| US6043785A (en) * | 1998-11-30 | 2000-03-28 | Radio Frequency Systems, Inc. | Broadband fixed-radius slot antenna arrangement |
| WO2001052352A1 (en) * | 2000-01-07 | 2001-07-19 | Modular Mining Systems, Inc. | Array antenna for d-shaped, h-plane radiation pattern |
| US20020075195A1 (en) * | 2000-12-20 | 2002-06-20 | Charles Powell | Dual band antenna using a single column of elliptical vivaldi notches |
-
2003
- 2003-01-23 CN CNB031008526A patent/CN100356630C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5519408A (en) * | 1991-01-22 | 1996-05-21 | Us Air Force | Tapered notch antenna using coplanar waveguide |
| US6043785A (en) * | 1998-11-30 | 2000-03-28 | Radio Frequency Systems, Inc. | Broadband fixed-radius slot antenna arrangement |
| WO2001052352A1 (en) * | 2000-01-07 | 2001-07-19 | Modular Mining Systems, Inc. | Array antenna for d-shaped, h-plane radiation pattern |
| US20020075195A1 (en) * | 2000-12-20 | 2002-06-20 | Charles Powell | Dual band antenna using a single column of elliptical vivaldi notches |
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| Publication number | Publication date |
|---|---|
| CN1519987A (en) | 2004-08-11 |
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