CN202282455U - Circular polarized differential feeder patch antenna - Google Patents
Circular polarized differential feeder patch antenna Download PDFInfo
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- CN202282455U CN202282455U CN2011204318528U CN201120431852U CN202282455U CN 202282455 U CN202282455 U CN 202282455U CN 2011204318528 U CN2011204318528 U CN 2011204318528U CN 201120431852 U CN201120431852 U CN 201120431852U CN 202282455 U CN202282455 U CN 202282455U
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Abstract
The utility model discloses a circular polarized differential feeder patch antenna which comprises an upper-layer radiation patch, two L-shaped feeder panels and a lower-layer horizontal substrate, wherein the upper-layer radiation patch comprises a first radiation patch and a second radiation patch which is arranged above the first radiation patch, the first radiation patch and the second radiation patch are spaced at an interval through an isolation foam, the first radiation patch is larger than the second radiation patch, the two L-shaped feeder panels are directly connected to the first radiation patch in the upper-layer radiation patch, each L-shaped feeder panel is connected with the lower-layer horizontal substrate and an SMA (shape memory alloy) connector through a probe, and the L-shaped feeder panels are excited by a pair of differential signals. Through adoption of the circular polarized differential feeder patch antenna disclosed by the utility model, the impedance bandwidth and axial ratio bandwidth can be expanded, and on a working frequency band, low-level cross polarization and stable directional diagram and gain can be seen. The scheme of the utility model can be used in increasingly popular radio-frequency differential circuits and systems.
Description
Technical field
The utility model relates to the antenna of wireless communication field, especially is applied to the paster antenna of circular polarization.
Background technology
In recent years, radio communication technology development such as radar, global positioning system, cellular communication are swift and violent.To the demand of radio communication sustainable growth more and more researchers is put among the innovative development of radio communications system.In radio communications system, antenna is core parts.Compare with linear polarized antenna, circular polarized antenna has wideer reception and azimuth firing angle, and advantages such as better mobility, and better weather adaptability are so be applied even more extensively in the middle of radio communication.
In recent years, radio RF recognition technology (Radio Frequency Identification is called for short RFID) industry development is more and more faster, all is widely used in a plurality of fields such as traffic, logistics, monitoring.In the rfid system, when reader antenna was circular polarized antenna, this antenna can both effectively read the label of putting different angles and position.Because the radiated electric field of circular polarized antenna rotates, can communicate with the linear polarized antenna of any direction, and label generally is a linear polarization, so reader antenna can carry out excellent communications with label.In the practical communication process, the position of label is often put irregular, so circular polarized antenna is used very extensive in the RFID field.
Mostly present circular polarized antenna is the antenna of single-ended format.And in radio circuit, difference channel is because its excellent characteristic is used more and more general.If adopt the interconnection of single-ended antenna and difference channel, need carry out imbalance to the balance conversion at middle Jia Balun, Ba Lunhui brings extra loss, and has the disequilibrium of amplitude-phase, influences the radiance of antenna.
The utility model content
In order to address the above problem, the utility model provides circular polarization differential feed paster antenna, adopt difference form to carry out feed, can directly be connected and avoid use Ba Lun with difference channel.
For realizing the utility model purpose, the technical scheme that the utility model adopted is following:
Circular polarization differential feed paster antenna; The horizontal base plate that comprises the radiation patch on upper strata, two L shaped feeder panels, lower floor; The radiation patch on upper strata comprises first radiation patch and second radiation patch; Second radiation patch is positioned at first radiation patch top, and spaced apart through an insulation foam between first radiation patch and second radiation patch, the first radiation patch area is bigger than second radiation patch; L shaped feed pole plate comprises vertical component and horizontal component; The upper end of two L shaped feed pole plates is directly connected to first radiation patch in the radiation patch of upper strata; The lower end of each L shaped feed pole plate all links to each other with a SMA connector with the horizontal base plate of lower floor through a probe separately, and L shaped feed pole plate adopts a pair of differential signal to encourage; L shaped feeder panel is through linking to each other to come direct feed with first radiation patch, and second radiation patch is through first radiation patch coupling feed.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, horizontal base plate, L shaped feeder panel, two radiation patch all are to adopt conductive metallic material.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, the center of the center of first radiation patch and second radiation patch is on same straight line.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, the edge of first radiation patch and second radiation patch is parallel to each other.
Optimisation technique scheme as above-mentioned circular polarization differential feed paster antenna; The area of first radiation patch is greater than the area of second radiation patch; First radiation patch is the same with the shape of second radiation patch, is square and is excised the remainder behind a pair of diagonal angle by straight line.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, first radiation patch approximates the half-wavelength of this center of antenna frequency not excising square length of side length under the diagonal angle situation.
Optimisation technique scheme as above-mentioned circular polarization differential feed paster antenna; Two L shaped feed pole plates are parallel to each other; The vertical component of L shaped feed pole plate is perpendicular to an opposite side of horizontal base plate; Being centered close between two L shaped feed pole plates of horizontal base plate, two L shaped feed pole plates are symmetrical about the middle separated time of an opposite side of horizontal base plate.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, the vertical component of L shaped feed pole plate is perpendicular to an opposite side of first radiation patch.
As the optimisation technique scheme of above-mentioned circular polarization differential feed paster antenna, the said probe that is connected with L shaped feed pole plate is positioned at the central point of the horizontal component of L shaped feed pole plate.
Compared with prior art, the antenna of the technical scheme that the utility model provides can be expanded impedance bandwidth, is applicable to the radio-frequency differential circuit of more and more popularizing.On working band, can see low-level cross polarization, have the axial ratio bandwidth (AR-3dB) of stable radiation direction and the radiation direction of high stability.The technical scheme of using the utility model to provide can be expanded impedance bandwidth and axial ratio bandwidth, and on working band, can see low-level cross polarization and stable directional diagram and gain.This scheme can be used for more and more universal radio-frequency differential Circuits and Systems.
Description of drawings
Fig. 1 is the structural representation (X, Y, Z are change in coordinate axis direction) of embodiment circular polarization differential feed paster antenna.
Fig. 2 is the center and the second radiation patch structural representation of first radiation patch;
Fig. 3 is the front view (Z-X plane) of embodiment circular polarization differential feed paster antenna.
Fig. 4 is the end view (Z-Y plane) of embodiment circular polarization differential feed paster antenna.
Fig. 5 is the emulation of embodiment circular polarization differential feed paster antenna and the standing-wave ratio curve chart of test.
Fig. 6 is the emulation of embodiment circular polarization differential feed paster antenna and the axial ratio curve chart of test.
Fig. 7 is the emulation of embodiment circular polarization differential feed paster antenna and the antenna gain curve chart of test.
Fig. 8 is the directional diagram of the antenna gain of the emulation that 2.09GHz draws on frequency band.
Fig. 9 is the directional diagram of the antenna gain of the emulation that 2.27GHz draws on frequency band.
Figure 10 is the directional diagram of the antenna gain of the emulation that 2.43GHz draws on frequency band.
Figure 11 is the directional diagram of the antenna gain of the test that 2.09GHz draws on frequency band.
Figure 12 is the directional diagram of the antenna gain of the test that 2.27GHz draws on frequency band.
Figure 13 is the directional diagram of the antenna gain of the test that 2.43GHz draws on frequency band.
Specific embodiments
Be described further below in conjunction with the enforcement of accompanying drawing, but the enforcement of the utility model is not limited thereto the utility model.
The utility model uses the difference excitation, with the paster antenna of pair of L-shaped feed pole plate feed, such structure can be expanded impedance bandwidth, to be used for more and more universal radio-frequency differential circuit.
At first, used after the broadband feed scheme by the rectangular patch antenna of corner cut for one, produced suitable impedance bandwidth and axial ratio bandwidth, and had stable radiation direction.For expansion axial ratio bandwidth further, used another one here by the paster of corner cut.On working band, can see low-level cross polarization and suitable gain.
Simultaneously, because common-mode noise is had stronger inhibitory action, microwave difference channel technology has obtained great concern in recent years.These have guided the stable development of differential feed paster antenna (DFPAs).For a DFPA; Here use pair of L-shaped feed pole plate, impedance bandwidth can reach more than 70%. and furtherly, this L shaped feed pole plate is to having realized low-level cross polarization on bandwidth of operation; And the radiation direction of antenna is stable, has reacted the advantage on the feed structure.
Mostly present circular polarized antenna is the antenna of single-ended format.And in radio circuit, difference channel is because its excellent characteristic is used more and more general.If adopt the interconnection of single-ended antenna and difference channel, need carry out imbalance to the balance conversion at middle Jia Balun, Ba Lunhui brings extra loss, and has the disequilibrium of amplitude-phase, influences the radiance of antenna.The differential feed paster antenna that we study circular polarization here just can overcome this problem.
As shown in Figure 1, circular polarization differential feed paster antenna comprises first radiation patch, 2, the second radiation patch 3, is used for the first L shaped feed pole plate 4 and the second L shaped feed pole plate, 5, the first probes 6, second probe 9 and the horizontal base plate 1 of differential feed; As shown in Figure 2; First radiation patch 2 is identical with the shape of second radiation patch 3; Be foursquare a pair of diagonal angle by straight line excision back rest parts; The part of in first radiation patch 2, being excised is the isosceles right triangle that area equates, the isosceles right triangle that the part of in second radiation patch 3, being excised also equates for area, and the area of first radiation patch 2 is greater than the area of second radiation patch 3; The center of first radiation patch 2 and second radiation patch 3 is on same vertical line, and the edge of the edge of first radiation patch 2 and second radiation patch 3 is parallel to each other; Like Fig. 3, shown in 4; Between first radiation patch 2 and second radiation patch 3 insulation foam is arranged; Be used to make between first radiation patch 2 and second radiation patch 3 spaced apart; The mode that first radiation patch 2 is passed through electromagnetic coupled is to second radiation patch, 3 feeds; The upper end of the first L shaped feed pole plate 4 and the second L shaped feed pole plate 5 directly links to each other with first radiation patch 2; The vertical component of the vertical component of the first L shaped feed pole plate 4 and the second L shaped feed pole plate 5 is perpendicular to an opposite side of first radiation patch 2 and an opposite side of horizontal base plate 1; The distance of horizontal component distance first radiation patch 2 of the horizontal component of the first L shaped feed pole plate 4 and the second L shaped feed pole plate 5 equates; The horizontal component of the first L shaped feed pole plate 4 links to each other with SMA connector 8 with horizontal base plate 1 through second probe 9, and the horizontal component of the second L shaped feed pole plate 5 links to each other with SMA connector 7 with horizontal base plate 1 through first probe 6, and second probe 9 and first probe 6 lay respectively at the center of the horizontal component of the first L shaped feed pole plate 4 and the second L shaped feed pole plate 5.
Embodiment
In design process, the length of first radiation patch 2 and second radiation patch 3 at first is determined, and is based on the working band.And then selection circuit.Next, use Zeland IE3D to form global optimization.In simulation process, differential signal is sent on the antenna, but does not use Ba Lun.
Take all factors into consideration impedance bandwidth, axial ratio bandwidth and antenna pattern, increase impedance bandwidth, axial ratio bandwidth is a limiting factor.In order to strengthen axial ratio bandwidth, just need manage to produce more mode of resonance, for this reason, the utility model has adopted the parasitic radiation unit, just second radiation patch.Fig. 5 has shown emulation on the frequency band and test standing-wave ratio.Can see that this antenna just has 52% impedance bandwidth (standing-wave ratio is 2), from 1.65GHz to 2.80GHz.Fig. 6 has shown the 3-dB axial ratio bandwidth of the emulation 14.6% that obtains to the 2.43GHz at 2.09GHz, yet the result of test is 15.9% bandwidth, and standing-wave ratio is not more than 2.
Fig. 7 has write down the gain of this antenna simulation and test.To the working band of 2.45GHz, simulation result and test result are coincide well at 2.09GHz.In working band, this antenna simulation gain approximately is 8.7dBi, and average test gain is 9dBi.The generation of difference mainly is because we have used the backward power distributor.When we calculated antenna gain, the insertion loss of anti-phase power divider will count.The insertion loss of distributor is tested in 50-Ω system.In test, the port of antenna has been connected on the distributor.Since port Impedance might not be accurate 50 errorless Ω, the insertion loss of distributor just has certain error so.In like manner, the amplitude of distributor and unbalance in phase have caused some errors.This has just caused the different of emulation and test result.
Fig. 8-Figure 13 has provided on (φ=0 °) in the plane and two vertical planes of this antenna the emulation of (φ=90 °, xz plane and yz plane) and the antenna pattern of test, and is last at frequency band 2.09GHz, 2.27GHz, 2.43GHz respectively.Right polarized radiation directional diagram on each plane is symmetrical on the broadside directive direction.Can see low-level cross polarization.The back lobe radiation level of emulation is lower than-17dB, and on working band, the back lobe radiation level of test then is lower than-20dB.This antenna demonstrates its stable radiation feature on the 3-dB axial ratio bandwidth.
The utility model discloses a kind of differential feed circularly-polarized patch antenna, use pair of L-shaped feed pole plate, such antenna is applicable to more and more general difference channel, and need not use Ba Lun.The radiation patch of each corner cut can produce the pair of orthogonal pattern.The utility model has been realized the axial ratio bandwidth of 15% 3-dB, and the test gain of antenna approximately is 9dBi.And this antenna all has stable radiation direction on its working band.This has also confirmed our design original intention.This scheme is with its outstanding circular polarization radiation performance, and is very popular in the difference channel of terrestrial communications systems.
The above is merely the preferred embodiment of the utility model; It is practical new to be not limited to basis, and for a person skilled in the art, the utility model can have various changes and variation; All within the spirit and principle of the utility model; Institute changes, and is equal to replacement, improvement etc., all is included within the protection range of the utility model.
Claims (9)
1. circular polarization differential feed paster antenna; The horizontal base plate that comprises the radiation patch on upper strata, two L shaped feeder panels, lower floor; It is characterized in that the radiation patch on upper strata comprises first radiation patch and second radiation patch, second radiation patch is positioned at first radiation patch top; Spaced apart through an insulation foam between first radiation patch and second radiation patch, the first radiation patch area is bigger than second radiation patch; L shaped feed pole plate comprises vertical component and horizontal component; The upper end of two L shaped feed pole plates is directly connected to first radiation patch in the radiation patch of upper strata, and the lower end of each L shaped feed pole plate all links to each other with a SMA connector with the horizontal base plate of lower floor through a probe separately.
2. circular polarization differential feed paster antenna according to claim 1 is characterized in that horizontal base plate, L shaped feeder panel, two radiation patch all are to adopt conductive metallic material.
3. circular polarization differential feed paster antenna according to claim 1, the center of center and second radiation patch that it is characterized in that first radiation patch is on same straight line.
4. circular polarization differential feed paster antenna according to claim 1 is characterized in that the edge of first radiation patch and second radiation patch is parallel to each other.
5. circular polarization differential feed paster antenna according to claim 4; It is characterized in that the area of the area of first radiation patch greater than second radiation patch; First radiation patch is the same with the shape of second radiation patch, is square and is excised the remainder behind a pair of diagonal angle by straight line.
6. circular polarization differential feed paster antenna according to claim 5 is characterized in that first radiation patch approximates the half-wavelength of this center of antenna frequency not excising square length of side length under the diagonal angle situation.
7. circular polarization differential feed paster antenna according to claim 1; It is characterized in that two L shaped feed pole plates are parallel to each other; The vertical component of L shaped feed pole plate is perpendicular to an opposite side of horizontal base plate; Being centered close between two L shaped feed pole plates of horizontal base plate, two L shaped feed pole plates are symmetrical about the middle separated time of an opposite side of horizontal base plate.
8. circular polarization differential feed paster antenna according to claim 7 is characterized in that the opposite side of the vertical component of L shaped feed pole plate perpendicular to first radiation patch.
9. circular polarization differential feed paster antenna according to claim 1 is characterized in that the said probe that is connected with L shaped feed pole plate is positioned at the central point of the horizontal component of L shaped feed pole plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204318528U CN202282455U (en) | 2011-11-03 | 2011-11-03 | Circular polarized differential feeder patch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204318528U CN202282455U (en) | 2011-11-03 | 2011-11-03 | Circular polarized differential feeder patch antenna |
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| Publication Number | Publication Date |
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| CN202282455U true CN202282455U (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204318528U Expired - Fee Related CN202282455U (en) | 2011-11-03 | 2011-11-03 | Circular polarized differential feeder patch antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509867A (en) * | 2011-11-03 | 2012-06-20 | 华南理工大学 | Circularly polarized differential feed patch antenna |
| CN104885301A (en) * | 2012-12-20 | 2015-09-02 | 迪尔公司 | Antenna for satellite navigation receiver |
| CN105990669A (en) * | 2015-01-30 | 2016-10-05 | 深圳光启尖端技术有限责任公司 | Antenna, antenna system and communication apparatus |
| CN109786963A (en) * | 2018-12-28 | 2019-05-21 | 西安交通大学 | A kind of broadband direction figure diversity antenna of low section |
| CN109860976A (en) * | 2019-02-26 | 2019-06-07 | 深圳市卓睿通信技术有限公司 | A kind of wideband patch antenna based on differential resonance device feed |
-
2011
- 2011-11-03 CN CN2011204318528U patent/CN202282455U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509867A (en) * | 2011-11-03 | 2012-06-20 | 华南理工大学 | Circularly polarized differential feed patch antenna |
| CN102509867B (en) * | 2011-11-03 | 2014-06-11 | 华南理工大学 | Circularly polarized differential feed patch antenna |
| CN104885301A (en) * | 2012-12-20 | 2015-09-02 | 迪尔公司 | Antenna for satellite navigation receiver |
| CN105990669A (en) * | 2015-01-30 | 2016-10-05 | 深圳光启尖端技术有限责任公司 | Antenna, antenna system and communication apparatus |
| CN109786963A (en) * | 2018-12-28 | 2019-05-21 | 西安交通大学 | A kind of broadband direction figure diversity antenna of low section |
| CN109786963B (en) * | 2018-12-28 | 2020-07-28 | 西安交通大学 | Low-profile broadband directional diagram diversity antenna |
| CN109860976A (en) * | 2019-02-26 | 2019-06-07 | 深圳市卓睿通信技术有限公司 | A kind of wideband patch antenna based on differential resonance device feed |
| CN109860976B (en) * | 2019-02-26 | 2021-05-07 | 深圳市卓睿通信技术有限公司 | Broadband patch antenna based on differential resonator feed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20141103 |
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| EXPY | Termination of patent right or utility model |