CN104993239A - Triple-polarized dielectric resonant antenna with high isolation and low cross polarization - Google Patents
Triple-polarized dielectric resonant antenna with high isolation and low cross polarization Download PDFInfo
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- CN104993239A CN104993239A CN201510419123.3A CN201510419123A CN104993239A CN 104993239 A CN104993239 A CN 104993239A CN 201510419123 A CN201510419123 A CN 201510419123A CN 104993239 A CN104993239 A CN 104993239A
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Abstract
The invention relates to a triple-polarized dielectric resonant antenna with high isolation and low cross polarization, which comprises a substrate, feeding ports, a microstrip feeder and a rectangular dielectric block, wherein the rectangular dielectric block is fixed at the central position on the upper surface of the substrate, the rectangular dielectric block comprises an inner-layer rectangular dielectric block and an outer-layer rectangular dielectric block, four linear grooves which are vertical to one another are formed in the substrate, the four linear grooves are distributed in a square shape, a cylindrical groove in the vertical direction is formed in the central position of the substrate, the number of the feeding ports is three, one feeding port is arranged at the center of the cylindrical groove in the substrate and adopts a coaxial line for directly feeding, and the feeding port excites a vertical polarized wave; and the other two feeding ports are respectively positioned on two adjacent sides of the substrate, respectively excite the four linear grooves through connecting the microstrip feeder at the bottom part of the substrate, and excite two horizontal polarized waves which are vertical to each other. Therefore, the polarized radiation in three directions is realized, the cross polarization is low, the isolation degree among the ports is high, the size is small, and the processing and assembly are easy.
Description
Technical field
The invention belongs to multi-polarization antenna technical field, relate to a kind of three polarized media resonant antennas in particular, this antenna has the feature of high-isolation low-cross polarization.
Background technology
Flourish along with radiotechnics, multi-polarization antenna is paid close attention to widely by industry and is furtherd investigate.Especially, in radio communication and radar system, multi-polarization antenna has purposes widely.Such as: in radio communication, multi-polarization antenna can realize polarization diversity, suppresses channel fading, improves system signal noise ratio; Polarization diversity technique is adopted to improve the availability of frequency spectrum in satellite communication; The multipolarization work of antenna can be utilized to realize the isolation of transceiver channel in RFID (Radio FrequencyIdentification) system; SAR (Synthetic Aperture Radar) radar system adopts multipolarization to increase the amount of information of scattering data significantly.
In numerous antenna design method, dielectric resonator antenna is adopted to realize the antenna design method that multipolarization is a kind of novelty.Dielectric resonator antenna is developed by dielectric resonator, and dielectric resonator is as energy storage device, is often used as filter or oscillator.Nineteen thirty-nine, the R.D.Richmyer of Stanford University demonstrates dielectric resonator except can except stored energy, also can outside emittance.And this idea is due to the restriction of dielectric material at that time and technique, is not accepted by numerous scholars.1967, Tisi and Sager studied first and DR is used as miniature antenna design.Within 1975, V.Bladel adopts theory deduction to draw dielectric resonator external radiation field and internal resonance field character.Afterwards, its research team goes out the result of study such as resonance frequency, the distribution of field shape of Q value about cylindricality annulus dielectric resonator, basic mode again.Nineteen eighty-three, the research team that Long S.A. teaches systematically proposes DRA concept first, and has done detailed research and report to cylindrical, rectangle and hemisphere DRA respectively.From then on after, dielectric resonator antenna obtains concern and the further investigation of more and more scholar.
Because dielectric resonator antenna adopts the medium of nonmetallic materials to process, and the dielectric constant kind of medium is more, thus dielectric resonator antenna flexible design, and adopts high-k can reduce the volume of dielectric resonator antenna.The geometric shape of dielectric resonator antenna is various in addition, and design team can synthesize various shape, be a kind of miniature antenna of practicality.Compared with conventional metal antennas, dielectric resonator antenna has the advantages such as mode of resonance is abundant, flexible design degree is high, size is little.
Summary of the invention
The object of this invention is to provide a kind of three polarized media resonant antennas of high-isolation low-cross polarization, this dielectric resonator antenna can be applicable to the polarization diversity of communication system and radar system anti-interference.
Technical scheme of the present invention is:
A kind of three polarized media resonant antennas of high-isolation low-cross polarization, comprise substrate, feed port and be positioned at the microstrip feed line of base lower surface, it is characterized in that: also comprise a Rectangular Enclosure with Participating Media block, described Rectangular Enclosure with Participating Media block is fixed on the center of upper surface of base plate, described Rectangular Enclosure with Participating Media block comprises internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block, described internal layer Rectangular Enclosure with Participating Media block is arranged on the inside of outer Rectangular Enclosure with Participating Media block, and the lower surface of described internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block flushes and the center of lower surface of two Rectangular Enclosure with Participating Media blocks and the center superposition of upper surface of base plate,
Substrate offers four orthogonal linear grooves, article four, linear grooves is square profile, spacing between adjacent linear grooves head and the tail is equal, article four, linear grooves encloses the center superposition of foursquare center and the upper surface of base plate being, the center of described substrate offers the cylindrical groove of a vertical direction, and the center of described internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block is provided with the cylindrical groove of the vertical direction connected with cylindrical groove on substrate;
Described feed port has three, is respectively the first feed port, the second feed port and the 3rd feed port; First feed port is positioned at the center of the cylindrical groove on substrate, and the first feed port adopts coaxial line direct feed; Second feed port and the 3rd feed port are positioned at the adjacent both sides of substrate, encourage four linear grooves respectively by the microstrip feed line bottom connection substrate; Second feed port and the 3rd feed port motivate two orthogonal horizontal polarized waves, and the first feed port motivates a vertically polarized wave, form the polarized radiation in three directions.
In the present invention, the dielectric constant of described outer Rectangular Enclosure with Participating Media block is 9-10, and the dielectric constant of internal layer Rectangular Enclosure with Participating Media block is 15-18.
In the present invention, substrate is square substrate, and the model that substrate adopts is Rogers4350 microwave base plate.Substrate upper strata is metal, and the bottom of substrate is provided with microstrip feed line.
In the present invention, the mutual isolation of described three feed port is all greater than 20dB, and cross polarization is less than-30dB.
Beneficial effect of the present invention:
This antenna achieves the polarized radiation in three directions, and cross polarization is little, and interport isolation is high, and small volume easily processes assembling.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention;
Fig. 2 is side elevational cross-section structural representation of the present invention;
Fig. 3 is upper surface of base plate structural representation of the present invention;
Fig. 4 is base lower surface structural representation of the present invention.
In figure: 1, substrate; 2, Rectangular Enclosure with Participating Media block; 201, internal layer Rectangular Enclosure with Participating Media block; 202, outer Rectangular Enclosure with Participating Media block; 3, the first feed port; 4, the second feed port; 5, the 3rd feed port; 6, microstrip feed line; 7, linear grooves.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
With reference to Fig. 1, a kind of three polarized media resonant antennas of high-isolation low-cross polarization, comprise substrate 1, feed port and be positioned at the microstrip feed line 6 of substrate 1 lower surface, also comprise a Rectangular Enclosure with Participating Media block 2, described Rectangular Enclosure with Participating Media block 2 is fixed on the center of substrate 1 upper surface, described Rectangular Enclosure with Participating Media block 2 comprises internal layer Rectangular Enclosure with Participating Media block 201 and outer Rectangular Enclosure with Participating Media block 202, and the dielectric constant of described outer Rectangular Enclosure with Participating Media block 202 is 9-10, and the dielectric constant of internal layer Rectangular Enclosure with Participating Media block 201 is 15-18.Internal layer adopts high-k can adjust the resonance frequency of vertically polarized wave, makes it consistent with horizontal polarized wave, and little for the impact of horizontal polarized wave.
Described internal layer Rectangular Enclosure with Participating Media block 201 is arranged on the inside of outer Rectangular Enclosure with Participating Media block 202, and the lower surface of described internal layer Rectangular Enclosure with Participating Media block 201 and outer Rectangular Enclosure with Participating Media block 202 flushes and the center of the lower surface of two Rectangular Enclosure with Participating Media blocks and the center superposition of substrate 1 upper surface;
Substrate 1 is square substrate, and substrate 1 adopts model to be Rogers4350 microwave base plate, and substrate upper strata is metal, and bottom is provided with microstrip feed line.Substrate 1 offers four orthogonal linear grooves 7, article four, linear grooves 7 is in square profile, spacing between adjacent linear grooves 7 head and the tail is equal, article four, linear grooves 7 encloses the center superposition of foursquare center and substrate 1 upper surface being, the center of described substrate 1 offers the cylindrical groove of a vertical direction, and the center of described internal layer Rectangular Enclosure with Participating Media block 201 and outer Rectangular Enclosure with Participating Media block 202 is provided with the cylindrical groove of the vertical direction connected with cylindrical groove on substrate 1.
Described feed port has three, be respectively the first feed port 3, second feed port 4 and the 3rd feed port 5, first feed port 3 is positioned at the center of the cylindrical groove on substrate 1, first feed port 3 adopts coaxial line direct feed, second feed port 4 and the 3rd feed port 5 are positioned at the adjacent both sides of substrate 1, four linear grooves are encouraged respectively by the microstrip feed line 6 bottom substrate 1, second feed port 4 and the 3rd feed port 5 motivate two orthogonal horizontal polarized waves, first feed port 4 motivates a vertically polarized wave, form the polarized radiation in three directions.
When adopting feeding classification as shown in the figure, three ports motivate two orthogonal horizontal polarized waves and a vertically polarized wave respectively.Three polarized states work in different mode.But three's operating frequency is close.Wherein the directional diagram of two horizontal polarizations is similar, and be top radiation, perpendicular polarization is omnidirectional radiation, and within the scope of effective band, antenna pattern is stablized.The mutual isolation of three ports is all greater than 20dB, and cross polarization is less than-30dB.And by choosing the different medium of dimensional parameters piece and feeder line, can design and there is similar performance, for three polarized media resonant antennas of different frequency range.
More than contain the explanation of the preferred embodiment of the present invention; this is to describe technical characteristic of the present invention in detail; be not want summary of the invention to be limited in the concrete form described by embodiment, other amendments carried out according to content purport of the present invention and modification are also protected by this patent.The purport of content of the present invention defined by claims, but not defined by the specific descriptions of embodiment.
Claims (5)
1. three polarized media resonant antennas of a high-isolation low-cross polarization, comprise substrate, feed port and be positioned at the microstrip feed line of base lower surface, it is characterized in that: also comprise a Rectangular Enclosure with Participating Media block, described Rectangular Enclosure with Participating Media block is fixed on the center of upper surface of base plate, described Rectangular Enclosure with Participating Media block comprises internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block, described internal layer Rectangular Enclosure with Participating Media block is arranged on the inside of outer Rectangular Enclosure with Participating Media block, and the lower surface of described internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block flushes and the center of lower surface of two Rectangular Enclosure with Participating Media blocks and the center superposition of upper surface of base plate,
Substrate offers four orthogonal linear grooves, article four, linear grooves is square profile, spacing between adjacent linear grooves head and the tail is equal, article four, linear grooves encloses the center superposition of foursquare center and the upper surface of base plate being, the center of described substrate offers the cylindrical groove of a vertical direction, and the center of described internal layer Rectangular Enclosure with Participating Media block and outer Rectangular Enclosure with Participating Media block is provided with the cylindrical groove of the vertical direction connected with cylindrical groove on substrate;
Described feed port has three, is respectively the first feed port, the second feed port and the 3rd feed port; First feed port is positioned at the center of the cylindrical groove on substrate, and the first feed port adopts coaxial line direct feed; Second feed port and the 3rd feed port are positioned at the adjacent both sides of substrate, encourage four linear grooves respectively by the microstrip feed line bottom connection substrate; Second feed port and the 3rd feed port motivate two orthogonal horizontal polarized waves, and the first feed port motivates a vertically polarized wave, form the polarized radiation in three directions.
2. three polarized media resonant antennas of high-isolation low-cross polarization according to claim 1, is characterized in that: the dielectric constant of described outer Rectangular Enclosure with Participating Media block is 9-10, and the dielectric constant of internal layer Rectangular Enclosure with Participating Media block is 15-18.
3. three polarized media resonant antennas of high-isolation low-cross polarization according to claim 1, is characterized in that: substrate is square substrate, and the model that substrate adopts is Rogers4350 microwave base plate.
4. three polarized media resonant antennas of high-isolation low-cross polarization according to claim 3, it is characterized in that: substrate upper strata is metal, the bottom of substrate is provided with microstrip feed line.
5. three polarized media resonant antennas of high-isolation low-cross polarization according to claim 1, is characterized in that: the mutual isolation of described three feed port is all greater than 20dB, and cross polarization is less than-30dB.
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Cited By (10)
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| CN106099360A (en) * | 2016-05-20 | 2016-11-09 | 华南理工大学 | Dielectric resonator filter antenna |
| JP2018533306A (en) * | 2015-10-28 | 2018-11-08 | ロジャーズ コーポレーション | Broadband multilayer dielectric resonator antenna and manufacturing method thereof |
| CN109193147A (en) * | 2018-09-14 | 2019-01-11 | 南通大学 | A kind of low section filter antenna using trough of belt dielectric patch |
| CN109216882A (en) * | 2017-06-30 | 2019-01-15 | 上海华为技术有限公司 | A kind of antenna, peripheral circuit, antenna system and signal processing method |
| CN110534890A (en) * | 2019-09-07 | 2019-12-03 | 电子科技大学 | The super skin antenna of low section dual polarization |
| CN110534883A (en) * | 2019-07-17 | 2019-12-03 | 天津大学 | Using the broadband low section dual polarized antenna of Based on Dual-Aperture coupling excitation |
| CN111244604A (en) * | 2020-01-15 | 2020-06-05 | 大连理工大学 | Dual-polarized millimeter wave dielectric resonator antenna for mobile terminal |
| CN112055917A (en) * | 2018-05-01 | 2020-12-08 | 罗杰斯公司 | Electromagnetic dielectric structure attached to substrate and method of making same |
| CN113451721A (en) * | 2021-06-03 | 2021-09-28 | 中山大学 | Dielectric filter based on bottom feed and without metal shielding |
| US11670859B1 (en) * | 2022-03-28 | 2023-06-06 | City University Of Hong Kong | Tri-band dual-polarized omnidirectional antenna |
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Cited By (14)
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| JP2018533306A (en) * | 2015-10-28 | 2018-11-08 | ロジャーズ コーポレーション | Broadband multilayer dielectric resonator antenna and manufacturing method thereof |
| CN106099360A (en) * | 2016-05-20 | 2016-11-09 | 华南理工大学 | Dielectric resonator filter antenna |
| CN109216882B (en) * | 2017-06-30 | 2019-12-24 | 上海华为技术有限公司 | Antenna, peripheral circuit and antenna system |
| CN109216882A (en) * | 2017-06-30 | 2019-01-15 | 上海华为技术有限公司 | A kind of antenna, peripheral circuit, antenna system and signal processing method |
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| CN112055917A (en) * | 2018-05-01 | 2020-12-08 | 罗杰斯公司 | Electromagnetic dielectric structure attached to substrate and method of making same |
| CN109193147A (en) * | 2018-09-14 | 2019-01-11 | 南通大学 | A kind of low section filter antenna using trough of belt dielectric patch |
| CN109193147B (en) * | 2018-09-14 | 2020-09-08 | 南通大学 | Low-profile filtering antenna adopting grooved dielectric patch |
| CN110534883A (en) * | 2019-07-17 | 2019-12-03 | 天津大学 | Using the broadband low section dual polarized antenna of Based on Dual-Aperture coupling excitation |
| CN110534890A (en) * | 2019-09-07 | 2019-12-03 | 电子科技大学 | The super skin antenna of low section dual polarization |
| CN110534890B (en) * | 2019-09-07 | 2020-11-27 | 电子科技大学 | Low-profile dual-polarized super-surface antenna |
| CN111244604A (en) * | 2020-01-15 | 2020-06-05 | 大连理工大学 | Dual-polarized millimeter wave dielectric resonator antenna for mobile terminal |
| CN113451721A (en) * | 2021-06-03 | 2021-09-28 | 中山大学 | Dielectric filter based on bottom feed and without metal shielding |
| US11670859B1 (en) * | 2022-03-28 | 2023-06-06 | City University Of Hong Kong | Tri-band dual-polarized omnidirectional antenna |
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Application publication date: 20151021 |