CN102904071A - L-band triple-frequency circularly polarized microstrip antenna - Google Patents
L-band triple-frequency circularly polarized microstrip antenna Download PDFInfo
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- CN102904071A CN102904071A CN2012103755165A CN201210375516A CN102904071A CN 102904071 A CN102904071 A CN 102904071A CN 2012103755165 A CN2012103755165 A CN 2012103755165A CN 201210375516 A CN201210375516 A CN 201210375516A CN 102904071 A CN102904071 A CN 102904071A
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Abstract
The invention relates to an L-band triple-frequency circularly polarized microstrip antenna. According to the invention, an innovative feed structure design is adopted; the feed structure comprises coaxial lines, metal wafers, medium wafers and a matched slot line structure; the antenna works at three frequencies f1, f2 and f3; and the polarization mode is of circular polarization. As an offset mode is adopted by the antenna at the frequencies f2 and f3 and a center feed mode is adopted at the frequency f1, the impact on antenna performance at the frequencies f2 and f3 due to a feed probe at the frequency f1 can be reduced effectively. Through adjusting dimension parameters of the feed structure, a central position of the microstrip antenna can be matched with the coaxial lines, wherein the impedance of the coaxial lines is 50 ohms. The antenna provided by the invention has the characteristics that the feed structure is simple, the directional diagram of the antenna, the standing wave of the antenna and the axial ratio performance of the antenna are relatively good, and the like. The antenna can be applied to a transmitting antenna of a navigational satellite and a receiving antenna of a terminal and has wide application prospect.
Description
Technical field
The present invention relates to a kind of microstrip antenna, particularly a kind of feed structure of L-band three frequency circular polarization microstrip antennas belongs to the microwave antenna technical field.
Background technology
At present, microstrip antenna has low section, middle gain, easily realizes that the characteristics such as circular polarization, easy processing, low cost are widely applied in array antenna.The common bandwidth of single layer microstrip antenna is narrower, and power capacity is lower, and for Bandwidth improves power capacity, the most effective solution normally utilizes the form of the little band of multilayer and a plurality of feed port to realize.
L-band three frequently circular polarization microstrip antenna antenna is operated in three centre frequency f
1, f
2, f
3, polarization mode is circular polarization.The form of antenna is upper, middle and lower-ranking metal radiation chip architecture, and is corresponding with three frequencies respectively.The lower metal radiation fin connects the two point feed structure that two phase place inputs differ 90 degree, and the metallic intermediate layer radiation fin is parasitic patch, realizes centre frequency f
2, f
3The circular polarization radiation ripple.Centre frequency f
1The realization of circular polarization radiation ripple utilized upper strata metal radiation sheet to increase the mode of otch perturbation, feeding classification is single-point feedback.Because the upper strata feed probes need to pass intermediate layer and lower metal radiation fin, so upper strata metal radiation sheet feed position has considerable influence to the radiance of intermediate layer and lower metal radiation fin.Generally, microstrip antenna input impedance changes with the change of feed position, can find the input impedance that is complementary with 50 Europe feed port by mobile feed position.
But the introducing of a plurality of feed port can destroy the radiation patch structural symmetry, and the performances such as the standing wave of antenna, Circular polarization ratio are impacted.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art, frequently circular polarization microstrip antenna of a kind of L-band three is provided, the feed structure of microstrip antenna adopts at centre frequency f
1First coaxial line at place is positioned at center of antenna axis place, can not destroy the symmetry of other layers structure, has improved standing wave and the axial ratio characteristic of antenna, and it is low to have a section, the advantages such as good electrical property.
Above-mentioned purpose of the present invention mainly is achieved by following technical solution:
A kind of L-band three is circular polarization microstrip antenna frequently, is operated in three centre frequency f
1, f
2And f
3Comprise feed structure, upper strata metal radiation sheet, metallic intermediate layer radiation fin, lower metal radiation fin and connection of antenna floor, wherein feed structure comprises the first coaxial line, the first metal disk, first medium disk, matching slot line structure, the second coaxial line, the second metal disk and second medium disk, wherein works in centre frequency f
1The first coaxial line, the first metal disk, first medium disk and matching slot line structure be positioned at center of antenna axis place, work in centre frequency f
2, f
3The second coaxial line, the second metal disk and second medium disk be positioned at skew center of antenna axis place; The first coaxial line passes respectively connection of antenna floor, lower metal radiation fin and metallic intermediate layer radiation fin, is connected with the first metal disk, keeps the interval by first medium disk and upper strata metal radiation sheet, realizes centre frequency f
1The electromagnetic coupled feed; The second coaxial line passes the connection of antenna floor and is connected with the second metal disk, keeps the interval by second medium disk and lower metal radiation fin, realizes centre frequency f
2, f
3The electromagnetic coupled feed; The center superposition of the center of matching slot line structure and upper strata metal radiation sheet wherein, the first coaxial line, the first metal disk and first medium disk carry out impedance matching by described matching slot line structure.
In above-mentioned L-band three frequency circular polarization microstrip antennas, work in centre frequency f
2, f
3The second coaxial line, the second metal disk, second medium disk be positioned at skew center of antenna axis 1/8 λ
2～1/4 λ
2The place, λ
2Centered by frequency f
2Wavelength.
At above-mentioned L-band three frequently in the circular polarization microstrip antennas, centered by the matching slot line structure with the deep-slotted chip breaker line structure of upper strata metal radiation sheet center superposition.
In above-mentioned L-band three frequency circular polarization microstrip antennas, the groove width L of matching slot line structure is 1/18 λ
1～1/22 λ
1, radian is 300 °～330 °, λ
1Centered by frequency f
1Wavelength.
In above-mentioned L-band three frequency circular polarization microstrip antennas, the first coaxial line is connected with the first metal disk, by the 0.2mm-2mm that is spaced apart of first medium disk and the maintenance of upper strata metal radiation sheet.
In above-mentioned L-band three frequency circular polarization microstrip antennas, the second coaxial line is connected with the second metal disk, by the 0.2mm-2mm that is spaced apart of second medium disk and the maintenance of lower metal radiation fin.
The present invention compared with prior art has following beneficial effect:
(1) microstrip antenna of the present invention adopts the feed structure of innovative design, and feed structure adopts at centre frequency f
1The first coaxial line, the first metal disk and the first medium disk at place is positioned at the structural design at center of antenna axis place, can not destroy the symmetry of other layers structure, improved standing wave and the axial ratio characteristic of antenna.
(2) feed structure of microstrip antenna of the present invention increases the matching slot line structure at upper strata sheet metal place, and the center superposition of the center of matching slot line structure and upper strata metal radiation sheet has been realized microstrip antenna central point coupling.
(3) the matching slot line structure of feed structure of the present invention is preferably the deep-slotted chip breaker line structure, and groove width and the radian of matching slot line structure is optimized design, so that the input impedance at metal radiation sheet center, upper strata is 50 Europe, and has guaranteed frequency f
1The axial ratio performance.
(4) the present invention's three frequency circular polarization microstrip antennas do not need the outer feeding network of plus, reduced the Antenna Design difficulty, it is low to have section, the advantages such as good electrical property, can be applicable in the coplanar conformal antenna system of airborne or missile-borne, in the reception antenna of the transmitting antenna of navigation satellite and terminating machine, widely market application foreground arranged.
(5) feed structure of the present invention is to being operated in centre frequency f
2, f
3The second coaxial line, the second metal disk and the position of second medium disk skew center of antenna axis be optimized design, further improved antenna in frequency f
2, f
3Standing wave and axial ratio performance.
(6) microstrip antenna of the present invention is in frequency f
2, f
3Adopt the mode of offset-fed, in frequency f
1Adopt the mode of apex drive, can effectively reduce frequency f
1Feed probes is to frequency f
2, f
3The impact of antenna performance; Dimensional parameters by adjusting feed structure can be so that the center of microstrip antenna and impedance are first coaxial line in 50 Europe to be complementary, and it is simple that the present invention has a feed structure, the characteristics such as antenna pattern, standing wave and axial ratio better performances.
Description of drawings
Fig. 1 is the frequently structural representation (partly cut-away) of circular polarization microstrip antenna of L-band three of the present invention;
Fig. 2 is matching slot line structure schematic diagram in the feed structure of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Be illustrated in figure 1 as the frequently structural representation (partly cut-away) of circular polarization microstrip antenna of L-band three of the present invention, be operated in three centre frequency f
1, f
2And f
3Comprise feed structure, upper strata metal radiation sheet 8, metallic intermediate layer radiation fin 9, lower metal radiation fin 10 and connection of antenna floor 11, wherein feed structure comprises the first coaxial line 1, the first metal disk 2, first medium disk 3, matching slot line structure 4, the second coaxial line 5, the second metal disk 6 and second medium disk 7, wherein works in centre frequency f
1 Coaxial line 1, the first metal disk 2, first medium disk 3 and matching slot line structure 4 be positioned at center of antenna axis place.The first coaxial line 1 passes respectively connection of antenna floor 11, lower metal radiation fin 10 and metallic intermediate layer radiation fin 9, is connected with the first metal disk 2, keeps fixed intervals by first medium disk 3 and upper strata metal radiation sheet 8, realizes centre frequency f
1The electromagnetic coupled feed; Be spaced apart 0.2mm-2mm in the present embodiment between the first coaxial line 1 and the upper strata metal radiation sheet 8.
The characteristic impedance of coaxial line 1 is 50 Europe, input is connected with the standard radio frequency joint, for example SMA, TNC radio-frequency joint etc., the other end is partly removed outer conductor at the intermediate layer radiation sheet metal more than 9, only keep inner wire, and be connected with metal disk 2,2 of upper strata radiation sheet metal 8 and metal disks add medium disk 3 and with the spacing distance of conductive adhesive to guarantee to fix.
Work in centre frequency f
2, f
3The second coaxial line 5, the second metal disk 6 and second medium disk 7 be positioned at skew center of antenna axis place, the location optimization of skew is skew center of antenna axis 1/8 λ
2～1/4 λ
2The place, λ
2Centered by frequency f
2Wavelength.The second coaxial line 5 passes connection of antenna floor 11 and is connected with the second metal disk 6, keeps fixed intervals by second medium disk 7 and lower metal radiation fin 10, realizes centre frequency f
2, f
3The electromagnetic coupled feed; Be spaced apart 0.2mm-2mm in the present embodiment between the second coaxial line 5 and the lower metal radiation fin 10.
Be illustrated in figure 2 as the matching slot line structure schematic diagram of feed structure of the present invention, centered by the matching slot line structure 4 with the deep-slotted chip breaker line structure of upper strata metal radiation sheet 8 center superpositions.The groove width L of matching slot line structure 4 is 1/18 λ in the present embodiment
1～1/22 λ
1, radian is 300 °～330 °, wherein λ
1Centered by frequency f
1Wavelength, the groove width L of matching slot line structure 4 is radius poor of the outer toroid of matching slot line structure 4 and interior annulus.The first coaxial line 1, the first metal disk 2 carry out impedance matching with first medium disk 3 by matching slot line structure 4.
Feed-in electromagnetic wave phase phasic difference 90 degree form antenna circular polarization mode of operation during frequently circular polarization microstrip antenna real work of L-band three of the present invention.
By above design, the L-band three of the present invention frequently main performance of circular polarization microstrip antenna can reach:
(1) operating frequency: f
1, f
2, f
3
(2) polarization mode: circular polarization
(3) axial ratio: less than 1dB
(4) gain: greater than 8.5dB.
The present invention is in frequency f
2, f
3Adopt the mode of offset-fed, in frequency f
1Adopt the mode of apex drive, can effectively reduce frequency f
1Feed probes is to frequency f
2, f
3The impact of antenna performance; Dimensional parameters by adjusting feed structure can be complementary so that the center of microstrip antenna and impedance are first coaxial line 1 in 50 Europe.It is simple that the present invention has a feed structure, and the characteristics such as antenna pattern, standing wave and axial ratio better performances can be applicable to have wide practical use in the reception antenna of the transmitting antenna of navigation satellite and terminating machine.
The above; only be the embodiment of the best of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
The content that is not described in detail in the specification of the present invention belongs to this area professional and technical personnel's known technology.
Claims (6)
1. L-band three frequency circular polarization microstrip antennas are operated in three centre frequency f
1, f
2And f
3It is characterized in that: comprise feed structure, upper strata metal radiation sheet (8), metallic intermediate layer radiation fin (9), lower metal radiation fin (10) and connection of antenna floor (11), wherein feed structure comprises the first coaxial line (1), the first metal disk (2), first medium disk (3), matching slot line structure (4), the second coaxial line (5), the second metal disk (6) and second medium disk (7), wherein works in centre frequency f
1The first coaxial line (1), the first metal disk (2), first medium disk (3) and matching slot line structure (4) be positioned at center of antenna axis place, work in centre frequency f
2, f
3The second coaxial line (5), the second metal disk (6) and second medium disk (7) be positioned at skew center of antenna axis place; The first coaxial line (1) passes respectively connection of antenna floor (11), lower metal radiation fin (10) and metallic intermediate layer radiation fin (9), be connected with the first metal disk (2), keep the interval by first medium disk (3) and upper strata metal radiation sheet (8), realize centre frequency f
1The electromagnetic coupled feed; The second coaxial line (5) passes connection of antenna floor (11) and is connected with the second metal disk (6), keeps the interval by second medium disk (7) and lower metal radiation fin (10), realizes centre frequency f
2, f
3The electromagnetic coupled feed; The center superposition of the center of matching slot line structure (4) and upper strata metal radiation sheet (8) wherein, the first coaxial line (1), the first metal disk (2) carry out impedance matching with first medium disk (3) by matching slot line structure (4).
2. a kind of L-band three frequency circular polarization microstrip antennas according to claim 1 is characterized in that: the described centre frequency f that works in
2, f
3The second coaxial line (5), the second metal disk (6), second medium disk (7) be positioned at skew center of antenna axis 1/8 λ
2～1/4 λ
2The place, λ
2Centered by frequency f
2Wavelength.
3. a kind of L-band according to claim 1 three circular polarization microstrip antennas frequently is characterized in that: centered by the described matching slot line structure (4) with the deep-slotted chip breaker line structure of upper strata metal radiation sheet (8) center superposition.
4. a kind of L-band according to claim 3 three circular polarization microstrip antennas frequently, it is characterized in that: the groove width L of described matching slot line structure (4) is 1/18 λ
1～1/22 λ
1, radian is 300 °～330 °, λ
1Centered by frequency f
1Wavelength.
5. a kind of L-band according to claim 1 three circular polarization microstrip antennas frequently, it is characterized in that: described the first coaxial line (1) is connected with the first metal disk (2), by the be spaced apart 0.2mm-2mm of first medium disk (3) with upper strata metal radiation sheet (8) maintenance.
6. a kind of L-band according to claim 1 three circular polarization microstrip antennas frequently, it is characterized in that: described the second coaxial line (5) is connected with the second metal disk (6), by the be spaced apart 0.2mm-2mm of second medium disk (7) with lower metal radiation fin (10) maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012103755165A CN102904071A (en) | 2012-09-29 | 2012-09-29 | L-band triple-frequency circularly polarized microstrip antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103755165A CN102904071A (en) | 2012-09-29 | 2012-09-29 | L-band triple-frequency circularly polarized microstrip antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794847A (en) * | 2014-01-18 | 2014-05-14 | 中国计量学院 | Low-profile antenna based on complementary split ring resonator |
| WO2018045531A1 (en) * | 2016-09-08 | 2018-03-15 | 深圳市天鼎微波科技有限公司 | Multi-mode satellite navigation antenna |
| CN109378576A (en) * | 2018-11-23 | 2019-02-22 | 江苏中科智睿物联网科技有限公司 | A kind of wide band high-gain circularly-polarized patch Quasi-Yagi antenna |
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| CN2919563Y (en) * | 2006-02-20 | 2007-07-04 | 西安海天天线科技股份有限公司 | Triple-frequency broad circular polarized antenna |
| CN101083358A (en) * | 2007-05-10 | 2007-12-05 | 北京航空航天大学 | Design of three-frequency dual-circle polarization GPS microstrip patch antenna |
| CN101102011A (en) * | 2007-07-12 | 2008-01-09 | 上海交通大学 | Coplanar wave guide feedback broadband circle polarized millimeter wave plane gap antenna |
| CN101859924A (en) * | 2010-05-11 | 2010-10-13 | 浙江大学 | Dual-band array antenna of frequency-selection-based surface resonance unit |
| CN102570019A (en) * | 2012-01-17 | 2012-07-11 | 上海大亚科技有限公司 | Surface-mounted radio-frequency antenna unit supporting double frequency and corresponding radio-frequency antenna system |
-
2012
- 2012-09-29 CN CN2012103755165A patent/CN102904071A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030146872A1 (en) * | 2002-02-06 | 2003-08-07 | Kellerman Francis William | Multi frequency stacked patch antenna with improved frequency band isolation |
| CN2919563Y (en) * | 2006-02-20 | 2007-07-04 | 西安海天天线科技股份有限公司 | Triple-frequency broad circular polarized antenna |
| CN101083358A (en) * | 2007-05-10 | 2007-12-05 | 北京航空航天大学 | Design of three-frequency dual-circle polarization GPS microstrip patch antenna |
| CN101102011A (en) * | 2007-07-12 | 2008-01-09 | 上海交通大学 | Coplanar wave guide feedback broadband circle polarized millimeter wave plane gap antenna |
| CN101859924A (en) * | 2010-05-11 | 2010-10-13 | 浙江大学 | Dual-band array antenna of frequency-selection-based surface resonance unit |
| CN102570019A (en) * | 2012-01-17 | 2012-07-11 | 上海大亚科技有限公司 | Surface-mounted radio-frequency antenna unit supporting double frequency and corresponding radio-frequency antenna system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103794847A (en) * | 2014-01-18 | 2014-05-14 | 中国计量学院 | Low-profile antenna based on complementary split ring resonator |
| CN103794847B (en) * | 2014-01-18 | 2015-08-26 | 中国计量学院 | Based on the low profile antenna of complementary openings resonant ring |
| WO2018045531A1 (en) * | 2016-09-08 | 2018-03-15 | 深圳市天鼎微波科技有限公司 | Multi-mode satellite navigation antenna |
| CN109378576A (en) * | 2018-11-23 | 2019-02-22 | 江苏中科智睿物联网科技有限公司 | A kind of wide band high-gain circularly-polarized patch Quasi-Yagi antenna |
| CN109378576B (en) * | 2018-11-23 | 2020-06-23 | 江苏中科智睿物联网科技有限公司 | Broadband high-gain circularly polarized patch quasi-yagi antenna |
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Application publication date: 20130130 |