CN105591193A - Double-frequency circularly polarized antenna - Google Patents

Double-frequency circularly polarized antenna Download PDF

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Publication number
CN105591193A
CN105591193A CN201610099961.1A CN201610099961A CN105591193A CN 105591193 A CN105591193 A CN 105591193A CN 201610099961 A CN201610099961 A CN 201610099961A CN 105591193 A CN105591193 A CN 105591193A
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frequency
low
double
frequency resonant
resonant cavity
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CN105591193B (en
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宋长宏
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CETC 54 Research Institute
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CETC 54 Research Institute
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas

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Abstract

The invention discloses a double-frequency circularly polarized antenna, which comprises, from top to bottom, a cone-shaped bell mouth, a low frequency resonant cavity, and a high frequency resonant cavity sequentially. The side wall of the low frequency resonant cavity and the side wall of the high frequency resonant cavity are fixedly provided with a low frequency polarized probe and a high frequency polarized probe respectively and correspondingly. The two resonant cavities are respectively in the shape of an elliptic cylinder, and the elliptical long axes are respectively and correspondingly collinear with the probes. The projections of the elliptical long axes of the two resonant cavities on the interface of the two resonant cavities are vertical to each other. The antenna provided by the invention is advantageous in that the impedance bandwidth is greater than 20%, the bandwidth inner gain is greater than 8.5 dB, the radiation efficiency is greater than 81.5%, the axis ratio bandwidth smaller than 3dB is greater than 25%, and the port isolation bandwidth is greater than 30%, and the central frequency of the double-frequency end is 1.5; the structure of the whole antenna is simple and compact, and the radio efficiency is high; the double-frequency circularly polarized radiation is adopted, and the antenna can be used as the plane array radiation unit, and therefore the high efficiency narrow wave beam radiation can be realized.

Description

Double frequency round polarized antenna
Technical field
The present invention relates to high efficiency circular polarised array antenna in satellite communication, microwave communication field,The technology of this Antenna Design mainly comprises: bore double frequency round polarized technology, high-isolation technology altogether.
Background technology
More and more develop to high band at communications band at present, especially at Ku, Ka wave band, itsFrequency determines that bandwidth ratio is operated in the antenna of L, S-band, is operated in the antenna that requires of this frequency rangeHave that size is little, the characteristic high, spot beam that gains, especially, its transmitting-receiving working frequency range distanceFar, need antenna two-frequency operation, and need circular polarization radiation, realize the antenna master of above-mentioned performanceThere is following several antenna form, but respectively have pluses and minuses.
1, Waveguide slot antenna: this form antenna is to crack at waveguide broadside or narrow limit,Conventionally have row ripple, two kinds of array formats of standing wave, but the gain in radiating element gap is relatively low,Conventionally only have 7dB left and right, owing to being series feed form, in bandwidth, occur frequently sweeping phenomenon, along withIncreasing of operating frequency, requires machining accuracy also higher, need be by higher welding procedure processingManufacture, yield rate is lower, causes cost higher, and realizes double frequency round polarized aperture radiation altogether,Difficulty is larger.
2, micro-strip paster antenna, this antenna form have profile low, can integrated active device,Can realize radiating element and network integration design, but the dielectric loss of antenna is larger, and depositsIn leaky wave effect, antenna element gain is low, feeding network loss is large, does not utilize and realizes high-gainAntenna Design.
3, reflector antenna, this form antenna has good radio-frequency performance in Ka frequency range,Differential loss is low, radiation efficiency is high, it is comparatively simple to realize the relative technology of circular polarization radiation, but this formAntenna physical size is larger, the inapplicable occasion at some narrow spaces.
4. lens antenna, this antenna form and reflector antenna are similar, conventionally adopt feed to irradiateMedium ball, medium cake etc., make wave beam focus on, realize high-gain irradiate object, but with reflectionIt is oversize that surface antenna has antenna volume equally, cannot realize the function that wave beam is adjusted.
Summary of the invention
The object of the invention is to avoid the weak point in above-mentioned background technology and provide a kind ofDouble frequency round polarized antenna, feature of the present invention is, double frequency round polarized radiation, loss is low, radiationEfficiency is high, high-isolation, compact conformation.
The present invention is achieved in that double frequency round polarized antenna, comprises conical horn mouth 1, lowFrequently resonator 2, high-frequency resonant cavity 3, high frequency polarized probe 4 and low frequency polarization probe 5, lowFrequently the upper shed of resonator 2 and the under shed of conical horn mouth 1 join, low-frequency resonant chamber 2On sidewall, be fixed with low frequency polarization probe 5; The upper shed of high-frequency resonant cavity 3 and low-frequency resonant chamber2 under shed joins, and is fixed with high frequency polarized probe 4 on the sidewall of high-frequency resonant cavity 3; LowFrequently resonator 2 and high-frequency resonant cavity 3 are cylindroid shape; Low frequency polarization probe 5 and low frequencyThe transverse conllinear of resonator 2, high frequency polarized probe 4 is long with the ellipse of high-frequency resonant cavity 3Axle conllinear; The transverse of the transverse in low-frequency resonant chamber 2 and high-frequency resonant cavity 3 is at twoThe interface of cavity is perpendicular.
Wherein, the diameter of the feed port of described conical horn mouth 1 is 0.65 λ0; Wherein,λ0For wavelength corresponding to the centre frequency of working frequency range.
Wherein, the length of the transverse in low-frequency resonant chamber 2 is less than the feed of conical horn mouth 1Port diameter.
Wherein, the length of the transverse in described low-frequency resonant chamber 2 is 0.525 λl, minor axisLength be 0.485 λl; The length of the transverse of high-frequency resonant cavity 3 is 0.5 λh, minor axisLength be 0.42 λh; Wherein, λlFor the centre frequency corresponding wavelength of low-frequency range, λhForThe centre frequency corresponding wavelength of high band.
Wherein, to enter the length in low-frequency resonant chamber 2 be 0.22 to described low frequency polarization probe 5λl, be 0.17 λ apart from the bottom surface in low-frequency resonant chamber 2l; High frequency polarized probe 4 enters heightFrequently the length of resonator 3 is 0.2 λh, be 0.11 λ apart from the bottom surface of high-frequency resonant cavity 3h；Wherein, λlFor the centre frequency corresponding wavelength of low-frequency range, λhFor the centre frequency pair of high bandAnswer wavelength.
Wherein, high band centre frequency corresponding wavelength λhWith low-frequency range centre frequency corresponding wavelengthλlRatio be: λh/λl＝1.5。
The present invention and background technology relatively have the following advantages:
1, double frequency round polarized antenna of the present invention is by conical horn mouth 1, low-frequency resonant chamber 2, heightFrequently resonator 3, high frequency polarized probe 4 and low frequency polarization probe 5 form, antenna impedance bandwidthBe greater than 20%, in bandwidth, gain is greater than 8.5dB, and radiation efficiency is greater than 81.5%, is less than 3dBAxial ratio bandwidth be greater than 25%, in port isolation bandwidth, be greater than 30%, the centre frequency of two-bandThan being 1.5 comparatively suitable.
2, the whole antenna structure of the present invention is simple, compact, and radiation efficiency is high, double frequency round polarizedRadiation, can be used as planar array radiating element, realizes the radiation of high efficiency narrow beam.
Brief description of the drawings
Fig. 1 is three-dimensional structure schematic diagram of the present invention.
Fig. 2 is perspective diagram of the present invention.
Detailed description of the invention
With reference to Fig. 1, Fig. 2, the present invention is by conical horn mouth 1, low-frequency resonant chamber 2, harmonic high frequencyShake chamber 3, high frequency polarized probe 4 and low frequency polarization probe 5 forms, and Fig. 1 is three-dimensional of the present inventionStructural representation, Fig. 2 is the inner perspective diagram of the present invention, provided between each parts relativelyPosition relationship and internal structure composition.
Conical horn mouth 1 is positioned at the superiors, and its effect is reception, transmission of electromagnetic signals, and pressesCertain spatial power wave beam coverage requirement, realize the design of directional diagram. The present invention adopts graduallyThe conical horn of variant, has ensured resonator and bell-mouthed impedance matching, conventionally gets circular cone loudspeakerThe radiation port diameter of mouth is its caliber size, and caliber size is 0.85 λ0(λ0For workThe centre frequency corresponding wavelength of frequency), can obtain so relatively high unit radiation gain,Space impedance matching preferably, has avoided again array pattern in the time of the design of group battle array to occur higherGraing lobe; The diameter of the feed port of conical horn mouth is 0.65 λ0, it has ensured with low frequency humorousThe good transition in chamber 2 of shaking, its size is slightly larger than the size of low-frequency resonant chamber 2 corresponding transverses,Conical horn mouth 1 bottom is connected with low-frequency resonant chamber 2. Conical horn mouth 1 can replace with angleCone horn mouth.
Low-frequency resonant chamber 2 is cylindroid shape, and its effect is the excitation that utilizes low frequency polarization probeIn its chamber, form rotating field, be radiated free space and just form circularly polarised wave. Low-frequency resonant chamber2 major axis is got bore 0.525 λ conventionallyl(λlFor wavelength corresponding to low-frequency range centre frequency),Minor axis dimension is 0.485 λl; The major axis conllinear in low frequency polarization probe 5 and low-frequency resonant chamber 2,Its middle probe enters metallic cavity and is of a size of 0.22 λl, apart from the bottom in low-frequency resonant chamber 2Be 0.17 λl。
High-frequency resonant cavity 3 is similarly cylindroid shape, but size is less than low-frequency resonant chamber 2, orderBe in its chamber form than the higher rotating field of low-frequency resonant chamber cavity frequency, then bySame conical horn mouth 1 radiate. The bottom phase in high-frequency resonant cavity 3 and low-frequency resonant chamber 2Connect, the transverse in its corresponding transverse and low-frequency resonant chamber 2 is in the throwing of both interfacesShadow is 90 °. The transverse of high-frequency resonant cavity 3 is got bore 0.5 λ conventionallyh(λhFor high frequencyWavelength corresponding to section centre frequency), minor axis dimension is 0.42 λh; High frequency polarized probe 4 and itsMajor axis conllinear, its middle probe enters metallic cavity and is of a size of 0.2 λh, apart from high-frequency resonant cavity3 bottom is 0.11 λh; Conventionally low-and high-frequency wavelength ratio λh/λl=1.5 is comparatively suitable, mutually itBetween less on the impact of antenna performance.
High frequency polarized probe 4 and low frequency polarization probe 5 are separately fixed at the resonator of two frequency rangesOn sidewall, for encouraging the signal of relative frequency range.
Research is found: according to above-mentioned antenna structure dimensional configurations, antenna axial ratio is less than 2dB'sBandwidth is 21%, is greater than 45%, the aperture radiation of two-band in antenna polarization port isolation bandwidthEfficiency is greater than 75%.
Operation principle of the present invention is as follows: in the time transmitting, emitter connects coaxial switch and sends outPenetrate signal, in low-frequency resonant chamber, respective frequencies has encouraged rotating electric field, forms circular polarization radiation ripple,Be radiated free space via conical horn mouth 1; High frequency polarized probe 4 has encouraged high-frequency resonantThe high-frequency signal in chamber 3, via the resonant cavity in low-frequency resonant chamber, finally by conical horn mouth 1Be radiated free space.

Claims (6)

1. double frequency round polarized antenna, comprises conical horn mouth (1), it is characterized in that: also bagDraw together low-frequency resonant chamber (2), high-frequency resonant cavity (3), high frequency polarized probe (4) and low-frequency poleChange probe (5), the under shed of the upper shed of low-frequency resonant chamber (2) and conical horn mouth (1)Join, on the sidewall of low-frequency resonant chamber (2), be fixed with low frequency polarization probe (5); Harmonic high frequencyThe shake upper shed in chamber (3) and the under shed of low-frequency resonant chamber (2) joins, high-frequency resonant cavity (3)Sidewall on be fixed with high frequency polarized probe (4); Low-frequency resonant chamber (2) and high-frequency resonant cavity(3) be cylindroid shape; Low frequency polarization probe (5) is ellipse with low-frequency resonant chamber (2)Circle major axis conllinear, the transverse conllinear of high frequency polarized probe (4) and high-frequency resonant cavity (3);The transverse of the transverse in low-frequency resonant chamber (2) and high-frequency resonant cavity (3) is in two chambeiesThe interface of body is perpendicular.
2. double frequency round polarized antenna according to claim 1, is characterized in that: described inThe diameter of feed port of conical horn mouth (1) be 0.65 λ0; Wherein, λ0For workThe wavelength corresponding to centre frequency of frequency range.
3. double frequency round polarized antenna according to claim 1, is characterized in that: low frequencyThe length of the transverse of resonator (2) is less than the feed port diameter of conical horn mouth (1).
4. double frequency round polarized antenna according to claim 2, is characterized in that: described inThe length of transverse in low-frequency resonant chamber (2) be 0.525 λl, the length of minor axis is 0.485λl; The length of the transverse of high-frequency resonant cavity (3) is 0.5 λh, the length of minor axis is 0.42λh; Wherein, λlFor the centre frequency corresponding wavelength of low-frequency range, λhFor the center frequency of high bandRate corresponding wavelength.
5. double frequency round polarized antenna according to claim 4, is characterized in that: described inLow frequency polarization probe (5) length that enters low-frequency resonant chamber (2) be 0.22 λl, distanceThe bottom surface in low-frequency resonant chamber (2) is 0.17 λl; High frequency polarized probe (4) enters harmonic high frequencyThe length in chamber (3) of shaking is 0.2 λh, be 0.11 λ apart from the bottom surface of high-frequency resonant cavity (3)h；Wherein, λlFor the centre frequency corresponding wavelength of low-frequency range, λhFor the centre frequency pair of high bandAnswer wavelength.
6. according to the double frequency round polarized antenna described in claim 4 or 5, it is characterized in that:High band centre frequency corresponding wavelength λhWith low-frequency range centre frequency corresponding wavelength λlRatio be:λh/λl＝1.5。
CN201610099961.1A 2016-02-24 2016-02-24 Double frequency round polarized antenna Active CN105591193B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107359405A (en) * 2017-07-27 2017-11-17 中国电子科技集团公司第五十四研究所 A kind of two-terminal feeding formula array antenna
CN108737796A (en) * 2017-04-17 2018-11-02 东莞百电子有限公司 A kind of novel combination S frequency ranges and KU frequency range tuner structures
CN109066048A (en) * 2018-07-03 2018-12-21 东莞理工学院 A kind of high-gain circular polarized antenna
CN109672022A (en) * 2019-02-27 2019-04-23 中国电子科技集团公司第五十四研究所 A kind of conical-horn antenna
CN113178687A (en) * 2021-04-13 2021-07-27 西安交通大学 Circularly polarized waveguide slot antenna
CN113690623A (en) * 2021-08-30 2021-11-23 合肥工业大学 Double-frequency circular polarization hexagonal horn antenna for improving aperture efficiency of array surface

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JPS5725705A (en) * 1980-07-23 1982-02-10 Nec Corp Antenna having asymmetrical rotary radial beam
CN102394374A (en) * 2011-06-29 2012-03-28 西安空间无线电技术研究所 Double frequency feed source
CN102956939A (en) * 2011-08-23 2013-03-06 百一电子股份有限公司 Dual-frequency wave guide tube
CN104051857A (en) * 2013-03-12 2014-09-17 电子科技大学 Novel small-caliber circular polarization high-efficiency unit
CN205488520U (en) * 2016-02-24 2016-08-17 中国电子科技集团公司第五十四研究所 Double frequency circularly polarized antenna

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5725705A (en) * 1980-07-23 1982-02-10 Nec Corp Antenna having asymmetrical rotary radial beam
CN102394374A (en) * 2011-06-29 2012-03-28 西安空间无线电技术研究所 Double frequency feed source
CN102956939A (en) * 2011-08-23 2013-03-06 百一电子股份有限公司 Dual-frequency wave guide tube
CN104051857A (en) * 2013-03-12 2014-09-17 电子科技大学 Novel small-caliber circular polarization high-efficiency unit
CN205488520U (en) * 2016-02-24 2016-08-17 中国电子科技集团公司第五十四研究所 Double frequency circularly polarized antenna

Non-Patent Citations (1)

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Title
YANGZHEN HUANG等: "A novel compact circularly polarized horn antenna", 《ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM(APSURSI),2014 IEEE》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108737796A (en) * 2017-04-17 2018-11-02 东莞百电子有限公司 A kind of novel combination S frequency ranges and KU frequency range tuner structures
CN107359405A (en) * 2017-07-27 2017-11-17 中国电子科技集团公司第五十四研究所 A kind of two-terminal feeding formula array antenna
CN107359405B (en) * 2017-07-27 2023-04-07 中国电子科技集团公司第五十四研究所 Dual-port feed type array antenna
CN109066048A (en) * 2018-07-03 2018-12-21 东莞理工学院 A kind of high-gain circular polarized antenna
CN109066048B (en) * 2018-07-03 2020-04-17 东莞理工学院 High-gain circularly polarized antenna
CN109672022A (en) * 2019-02-27 2019-04-23 中国电子科技集团公司第五十四研究所 A kind of conical-horn antenna
CN109672022B (en) * 2019-02-27 2024-04-09 中国电子科技集团公司第五十四研究所 Conical horn antenna
CN113178687A (en) * 2021-04-13 2021-07-27 西安交通大学 Circularly polarized waveguide slot antenna
CN113690623A (en) * 2021-08-30 2021-11-23 合肥工业大学 Double-frequency circular polarization hexagonal horn antenna for improving aperture efficiency of array surface

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