CN102117963A - Dual-frequency antenna - Google Patents
Dual-frequency antenna Download PDFInfo
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- CN102117963A CN102117963A CN2011100591135A CN201110059113A CN102117963A CN 102117963 A CN102117963 A CN 102117963A CN 2011100591135 A CN2011100591135 A CN 2011100591135A CN 201110059113 A CN201110059113 A CN 201110059113A CN 102117963 A CN102117963 A CN 102117963A
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- antenna
- microstrip antenna
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- lower floor
- upper strata
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Abstract
The invention relates to a dual-frequency antenna. The dual-frequency antenna comprises an upper microstrip antenna, a lower microstrip antenna, a reflector plate and two phase shifting feed networks, wherein the upper microstrip antenna and the lower microstrip antenna are fixed to the front surface of the reflector plate by bolts after being overlapped; the phase shifting feed networks are positioned on the back surface of the reflector plate; and both the upper microstrip antenna and the lower microstrip antenna feed through a dual-fed pin. The dual-frequency antenna not only is easy to realize, but also has a small volume, a good axial ratio bandwidth and a low elevation gain.
Description
Technical field
The present invention relates to field of antenna, relate in particular to a kind of dual-band antenna.
Background technology
Along with the high speed development of satellite navigation technology with in the extensive use of every field, the antenna performance of the hand-held receiving equipment in the satellite navigation and location system of high-acruracy survey has also been proposed more and more higher requirement, mainly show:
1, good circular polarization performance
In satellite communication, because circularly polarised wave rain, snow decay are little, it is strong to penetrate the ionosphere ability, is not subjected to the farad ground effects of terrestrial pole magnetic field outbreak, and satellite communication is general, and what use is the signal of circular polarization.So also should being operated in good circular polarization state accordingly, antenna could mate preferably with system.
2, can accept multiple-frequency signal
Ionosphere delay is to influence global positioning system (Global Positioning System, GPS) the main factor of absolute fix utilize to receive two-frequency signal and carry out difference processing, can effectively slacken ionospheric influence, promote positioning accuracy.
3, miniaturization, simple and reliable for structure
Because handheld device all has miniaturization, lightening trend, the space that is used to hold antenna is also more and more littler, thus antenna need can be under the prerequisite of guaranteed performance reliability, strict CONTROL VOLUME.
4, low elevation gain
In satellite communication, require antenna can when the elevation angle that is not less than 5 °, can be good at receiving satellite-signal, this just requires the gain of antenna when hanging down the elevation angle to want enough high.
Summary of the invention
The purpose of this invention is to provide a kind of dual-band antenna, to satisfy hand-held receiving equipment in the satellite navigation and location system as far as possible to the requirement of antenna.The present invention not only is easy to realize, and volume is little, has good axial ratio bandwidth and low elevation gain.
The present invention proposes a kind of dual-band antenna, comprise upper strata microstrip antenna, lower floor's microstrip antenna, reflecting plate and two phase shift feeding networks;
Be fixed on the front of said reflection plate after above-mentioned upper strata microstrip antenna and above-mentioned lower floor microstrip antenna are overlapping by screw, above-mentioned phase shift feeding network is positioned at the back side of said reflection plate; Above-mentioned upper strata microstrip antenna and above-mentioned lower floor microstrip antenna are all by double-fed pin feed.
Preferably, above-mentioned antenna also comprises dielectric layer between described lower floor microstrip antenna and said reflection plate.
Preferably, above-mentioned antenna also comprises a shielding box, above-mentioned shielding box be positioned at the said reflection plate back side under.
Preferably, the working frequency range of above-mentioned upper strata microstrip antenna is greater than the working frequency range of above-mentioned lower floor microstrip antenna.
Preferably, above-mentioned lower floor microstrip antenna is provided with the metallization via hole that the feedback pin for above-mentioned upper strata microstrip antenna passes.
Preferably, above-mentioned center of antenna is provided with the metallization via hole.
The present invention adopts corresponding two different frequencies of upper and lower layer microstrip antenna of independent double-fed pin direct feed to realize two-frequency operation, the corresponding high band of upper strata microstrip antenna, the corresponding low-frequency range of lower floor's microstrip antenna; The present invention compares with the dual-band antenna that adopts single feedback pin feed, has easy debugging, need not the advantage of corner cut; The present invention utilizes two phase shift feeding networks that two feedback pins are carried out 90 degree phase difference feeds, has realized circular polarization work; Center of antenna of the present invention is provided with the metallization via hole, makes antenna possess good earth; Emulation and measured result show that all antenna of the present invention has good axial ratio bandwidth and low elevation gain, are applicable to the hand-held receiving equipment in the satellite navigation and location system of high-acruracy survey.
Description of drawings
Fig. 1 is the tangent plane schematic diagram of the preferred embodiment of dual-band antenna of the present invention;
Fig. 2 is the front schematic view of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1;
Fig. 3 is the front schematic view of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1;
Fig. 4 is the schematic rear view of the reflecting plate of the described dual-band antenna of Fig. 1;
Fig. 5 is the gain analogous diagram of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1;
Fig. 6 is the gain analogous diagram of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1;
Fig. 7 is the axial ratio analogous diagram of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1;
Fig. 8 is the axial ratio analogous diagram of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1.
The realization of the object of the invention, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Further specify technical scheme of the present invention below in conjunction with Figure of description and specific embodiment.
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, be the tangent plane schematic diagram of the preferred embodiment of dual-band antenna of the present invention; Present embodiment comprises upper strata microstrip antenna 1, lower floor's microstrip antenna 2, dielectric layer 3, reflecting plate 4, be positioned at the phase shift feeding network 5 at reflecting plate 4 back sides and be positioned at shielding box 6 under reflecting plate 4 back sides; Among the figure, 11 is the radiation patch of upper strata microstrip antenna 1, and 12 is the dielectric substrate of upper strata microstrip antenna 1, and 13 is the feedback pin of upper strata microstrip antenna 1; 21 is the radiation patch of lower floor's microstrip antenna 2, and 22 is the dielectric substrate of lower floor's microstrip antenna 2, and 23 is the feedback pin of lower floor's microstrip antenna 2, the 24 metallization via holes that pass for the feedback pin 13 of keeping supplying layer microstrip antenna 1 on lower floor's microstrip antenna 2; 7 is the metallization via hole of above-mentioned center of antenna, and metallization via hole 7 makes that antenna integral body can good earth; 8 is screw hole; Present embodiment respectively is provided with a screw hole in the centre position, four limits of antenna, and the overlapping successively back of upper strata microstrip antenna 1, lower floor's microstrip antenna 2 and dielectric layer 3 is fixed on the reflecting plate 4 through screw hole 8 by screw; Shielding box 6 is used for isolated antennas and other circuit boards; Upper strata microstrip antenna 1 is by 13 direct feeds of two feedback pins, and two feedback pins 13 of upper strata microstrip antenna 1 pass corresponding two metallization via holes, 24 arrival phase shift feeding networks 5 on lower floor's microstrip antenna 2 respectively; Lower floor's microstrip antenna 2 is also by 23 direct feeds of two feedback pins.
In the present embodiment, dielectric layer 3 between lower floor's microstrip antenna 2 and the reflecting plate 4 is made up of a dielectric substrate, in other embodiments, according to the bandwidth requirement of dual-band antenna, can there be dielectric layer 3, also can be that two or more the dielectric substrate that fits together forms dielectric layer 3, such as, in actual applications, if dielectric substrate 22 thickness of lower floor's microstrip antenna 2 can satisfy the requirement of dual-band antenna to bandwidth, then can there be dielectric layer 3; If can not satisfy bandwidth requirement, then need to increase dielectric layer 3, suppose to need to increase the dielectric layer 3 of 6 millimeters thickness, the dielectric substrate that can select one 6 millimeters so is as dielectric layer 3, also can select the dielectric substrate of one 2 millimeters dielectric substrate and 4 millimeters to fit together and form dielectric layer 3.
As shown in Figure 2, be the front schematic view of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1; Among the figure, 14 is the signal hole, feedback pin 13 positions of upper strata microstrip antenna 1; Upper strata microstrip antenna 1 comprises radiation patch 11, dielectric substrate 12, and upper strata microstrip antenna 1 is by metallic vias 7 ground connection; The gain analogous diagram of upper strata microstrip antenna 1 and axial ratio analogous diagram are referring to Fig. 5, Fig. 7.
As shown in Figure 3, be the front schematic view of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1; Among the figure, the 24 metallization via holes that pass for the feedback pin 13 of keeping supplying layer microstrip antenna 1 on lower floor's microstrip antenna 2; 7 are the metallization via hole of center of antenna of the present invention, and 25 is the signal hole, feedback pin 23 positions of lower floor's microstrip antenna 2; Lower floor's microstrip antenna 2 comprises radiation patch 21, dielectric substrate 22, by metallization via hole 7 ground connection; The gain analogous diagram of lower floor's microstrip antenna 2 and axial ratio analogous diagram are referring to Fig. 6, Fig. 8.
As shown in Figure 4, be the schematic rear view of the reflecting plate of the described dual-band antenna of Fig. 1, phase shift feeding network 5 is positioned at the back side of reflecting plate 4, and 7 is the metallization via hole of center of antenna, and upper and lower layer microstrip antenna utilizes phase shift feeding network 5 to realize circular polarization work.
As shown in Figure 5, be the gain analogous diagram of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1, wherein transverse axis (X-axis) is represented elevation angle angle, the longitudinal axis (Y-axis) expression antenna gain.
As shown in Figure 6, be the gain analogous diagram of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1, wherein transverse axis (X-axis) is represented elevation angle angle, the longitudinal axis (Y-axis) expression antenna gain.
As shown in Figure 7, be the axial ratio analogous diagram of the upper strata microstrip antenna of the described dual-band antenna of Fig. 1, wherein transverse axis (X-axis) is represented elevation angle angle, the longitudinal axis (Y-axis) expression axial ratio.
As shown in Figure 8, be the axial ratio analogous diagram of lower floor's microstrip antenna of the described dual-band antenna of Fig. 1, wherein transverse axis (X-axis) is represented elevation angle angle, the longitudinal axis (Y-axis) expression axial ratio.
Among the present invention, lower floor's microstrip antenna 2 as radiant body the time relative upper strata microstrip antenna 1 also play the effect of upper strata microstrip antenna 1 of serving as with reference to ground, under all identical prerequisite of the dielectric constant of the dielectric substrate of upper and lower layer microstrip antenna, the working frequency range of upper strata microstrip antenna 1 is greater than the working frequency range of lower floor's microstrip antenna 2.
Among the present invention, dielectric layer adopts the low-loss dielectric substrate of high-k, makes antenna possess good impedance bandwidth and axial ratio bandwidth on the working frequency points that requires, and is applicable in the hand-held receiving equipment of satellite navigation system of high-acruracy survey.
Below only be the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent transformation that utilizes content of the present invention to do, or with the present invention directly/be used in concrete equipment or other relevant technical fields indirectly, include in scope of patent protection of the present invention.
Claims (6)
1. a dual-band antenna is characterized in that, described antenna comprises upper strata microstrip antenna, lower floor's microstrip antenna, reflecting plate and two phase shift feeding networks;
Be fixed on the front of described reflecting plate after described upper strata microstrip antenna and described lower floor microstrip antenna are overlapping by screw, described phase shift feeding network is positioned at the back side of described reflecting plate; Described upper strata microstrip antenna and described lower floor microstrip antenna are all by double-fed pin feed.
2. dual-band antenna according to claim 1 is characterized in that, described antenna also comprises dielectric layer between described lower floor microstrip antenna and described reflecting plate.
3. dual-band antenna according to claim 1 and 2 is characterized in that described antenna also comprises a shielding box, described shielding box be positioned at the described reflecting plate back side under.
4. dual-band antenna according to claim 1 is characterized in that, the working frequency range of described upper strata microstrip antenna is greater than the working frequency range of described lower floor microstrip antenna.
5. dual-band antenna according to claim 1 is characterized in that, described lower floor microstrip antenna is provided with the metallization via hole that the feedback pin for described upper strata microstrip antenna passes.
6. dual-band antenna according to claim 1 and 2 is characterized in that described center of antenna is provided with the metallization via hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110059113A CN102117963B (en) | 2011-03-11 | 2011-03-11 | Dual-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110059113A CN102117963B (en) | 2011-03-11 | 2011-03-11 | Dual-frequency antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102117963A true CN102117963A (en) | 2011-07-06 |
| CN102117963B CN102117963B (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110059113A Expired - Fee Related CN102117963B (en) | 2011-03-11 | 2011-03-11 | Dual-frequency antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904070A (en) * | 2012-09-29 | 2013-01-30 | 航天恒星科技有限公司 | Multi-frequency-point satellite navigation terminal antenna |
| CN103337691A (en) * | 2013-05-23 | 2013-10-02 | 深圳市华信天线技术有限公司 | Combined antenna and handheld antenna device |
| CN105375105A (en) * | 2014-08-28 | 2016-03-02 | 中国船舶重工集团公司第七二二研究所 | Dual-band antenna |
| CN108666742A (en) * | 2017-03-31 | 2018-10-16 | 华为技术有限公司 | Multifrequency antenna and communication equipment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311670A (en) * | 2013-05-30 | 2013-09-18 | 深圳市华信天线技术有限公司 | Satellite positioning antenna device |
| KR101989820B1 (en) | 2017-03-14 | 2019-06-18 | 주식회사 아모텍 | Multilayer patch antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689486Y (en) * | 2004-04-07 | 2005-03-30 | 顾志忠 | Antenna of radiating array telecommunicating base station with high-power microwave |
-
2011
- 2011-03-11 CN CN201110059113A patent/CN102117963B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2689486Y (en) * | 2004-04-07 | 2005-03-30 | 顾志忠 | Antenna of radiating array telecommunicating base station with high-power microwave |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904070A (en) * | 2012-09-29 | 2013-01-30 | 航天恒星科技有限公司 | Multi-frequency-point satellite navigation terminal antenna |
| CN102904070B (en) * | 2012-09-29 | 2015-02-11 | 航天恒星科技有限公司 | Multi-frequency-point satellite navigation terminal antenna |
| CN103337691A (en) * | 2013-05-23 | 2013-10-02 | 深圳市华信天线技术有限公司 | Combined antenna and handheld antenna device |
| CN105375105A (en) * | 2014-08-28 | 2016-03-02 | 中国船舶重工集团公司第七二二研究所 | Dual-band antenna |
| CN105375105B (en) * | 2014-08-28 | 2018-06-26 | 中国船舶重工集团公司第七二二研究所 | A kind of dual-band antenna |
| CN108666742A (en) * | 2017-03-31 | 2018-10-16 | 华为技术有限公司 | Multifrequency antenna and communication equipment |
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| Publication number | Publication date |
|---|---|
| CN102117963B (en) | 2012-08-29 |
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Granted publication date: 20120829 Termination date: 20170311 |