CN112421228A - Double-layer differential feed circularly polarized antenna - Google Patents
Double-layer differential feed circularly polarized antenna Download PDFInfo
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- CN112421228A CN112421228A CN202011339228.5A CN202011339228A CN112421228A CN 112421228 A CN112421228 A CN 112421228A CN 202011339228 A CN202011339228 A CN 202011339228A CN 112421228 A CN112421228 A CN 112421228A
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- 239000002184 metal Substances 0.000 claims abstract description 50
- 230000003071 parasitic effect Effects 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims abstract description 15
- 230000010287 polarization Effects 0.000 claims description 20
- 239000010410 layer Substances 0.000 claims description 12
- 239000002355 dual-layer Substances 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 6
- 230000010354 integration Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The invention discloses a double-layer differential feed circularly polarized antenna, which belongs to the technical field of wireless communication and comprises a metal cover plate, a dielectric substrate, a strip-shaped differential feed line pair, a parasitic structure and a circularly polarized radiator, wherein the metal cover plate is arranged on the dielectric substrate, the circularly polarized radiator penetrates through the metal cover plate, and the strip-shaped differential feed line pair and the parasitic structure are both arranged on the dielectric substrate and are positioned between the metal cover plate and the dielectric substrate. The invention adopts a double-layer plate structure, so that the problem of lamination deviation is avoided, and meanwhile, the production cost can be greatly reduced; the two radiation arms and the parasitic structure of the differential feed pair are directly utilized, and the signal is radiated by the circularly polarized radiator with a special shape, so that the signal transmission process is simplified, and the complexity of the antenna is greatly reduced; the position of the differential feeder line pair is convenient for realizing the automatic surface pasting of the chip, can meet the chip integration requirement and is beneficial to the integration and the large-scale production of the system board.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a double-layer differential feed circularly polarized antenna.
Background
With the development of science and technology, millimeter wave frequency bands are receiving more and more attention. Due to the advantages of wide absolute bandwidth, short wavelength, special atmospheric propagation characteristic and the like, the method has great potential in future communication, radar and other systems. Meanwhile, the differential signal operation is more suitable for the high-level integration of the system, the anti-interference capability of the system is improved, the higher harmonic interference of the system is reduced, the dynamic range of the system is improved, the system which works by adopting the differential signal can be directly connected with a back-end system if an antenna adopts a differential feed mode, so that the use of huge lossy balun is avoided, and the noise receiving performance and the transmitting power efficiency are improved. On the other hand, compared with linear polarization, the circularly polarized antenna can provide more potential channel capacity, and circularly polarized signals are beneficial to restraining multipath interference and restraining weather influences such as rain, fog and the like.
Most of the existing circular polarization feed modes are non-differential feed, and waveguide feed, coaxial feed, single-end feed and the like are common and are not easy to integrate systems. Moreover, because the physical size of the millimeter wave antenna is relatively small, the difficulty in designing, processing and the like severely limits the implementation approaches of the circularly polarized antenna. And a few circularly polarized feed modes adopt a differential feed mode, but the circularly polarized feed modes have complex structures, are difficult to process and are difficult to ensure the design performance of the antenna. Therefore, a dual-layer differential feed circularly polarized antenna is proposed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve the problem that the existing circularly polarized antenna has complex structure, is difficult to process and is difficult to ensure the design performance of the antenna in a differential feed mode, and provides a double-layer differential feed circularly polarized antenna.
The invention solves the technical problems by the following technical scheme, and comprises a metal cover plate, a dielectric substrate, a strip-shaped differential feeder line pair, a parasitic structure and a circular polarization radiator, wherein the metal cover plate is arranged on the dielectric substrate, the circular polarization radiator penetrates through the metal cover plate, and the strip-shaped differential feeder line pair and the parasitic structure are both arranged on the dielectric substrate and are positioned between the metal cover plate and the dielectric substrate.
Furthermore, an upper metal film is arranged on the upper surface of the dielectric substrate, a lower metal film is arranged on the lower surface of the dielectric substrate, and the strip-shaped differential feeder line pair and the parasitic structure are coplanar with the upper metal film.
Furthermore, the circularly polarized radiator is of a tubular structure and comprises an alternating section, the bottom caliber of the alternating section is circular, the intersection of the circular shape with the coincident geometric center and the rectangle is taken along the bottom upward caliber shape, and the circular size of the upper caliber shape of the alternating section is gradually increased on the basis of the circular size of the bottom caliber shape.
Furthermore, the circle center of the upper caliber-shaped circle and the circle center of the bottom caliber-shaped circle are on the same straight line.
Furthermore, the circularly polarized radiator further comprises a transition section, the top of the transition section is connected with the bottom of the alternating section, and the bottom of the transition section and the bottom of the alternating section are both circular in caliber shape with the same size.
Furthermore, a circular opening matched with the bottom caliber and the position of the alternating section is formed in the upper metal film, and the circle center of the circular opening and the circle center of the bottom caliber of the alternating section are on the same straight line.
Furthermore, the circular hole is provided with a reserved opening for arranging the strip-shaped differential feeder pair.
Furthermore, the strip-shaped differential feeder line pair comprises two metal strip lines which are arranged on the upper surface of the dielectric substrate in parallel, a radiation arm is arranged at the tail end of each metal strip line, the metal strip lines and the radiation arms are integrally formed, an included angle between the two radiation arms of each metal strip line is 180 degrees, and the radiation arms and the long edge of the metal cover plate have a certain included angle.
Furthermore, a plurality of stepped impedance lines used for ensuring that the electrical lengths of the two metal strip lines are the same are arranged on the shorter metal strip line in the strip-shaped differential feeder line, and the metal strip line and the stepped impedance lines are integrally formed.
Furthermore, the width of the parasitic structure is not consistent, and the long side of the parasitic structure is arranged in parallel with the radiation arm at intervals.
Compared with the prior art, the invention has the following advantages: the double-layer differential feed circularly polarized antenna adopts a double-layer plate structure, so that the problem of lamination deviation is avoided, and meanwhile, the production cost can be greatly reduced; the two radiation arms and the parasitic structure of the differential feed pair are directly utilized, and the signal is radiated by the circularly polarized radiator with a special shape, so that the signal transmission process is simplified, and the complexity of the antenna is greatly reduced; the position of the differential feeder line pair is convenient to realize automatic surface pasting of the chip, can meet the chip integration requirement, is beneficial to integration and large-scale production of a system board, and is worth being popularized and used.
Drawings
Fig. 1 is a schematic structural diagram of a circular polarization antenna according to an embodiment of the present invention;
fig. 2 is a schematic top view of a strip differential feed line pair according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the transmitting and receiving linear arrays in the same plane in the second embodiment of the present invention;
fig. 4 is a schematic diagram of the transmitting and receiving area array in the same plane in the third embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example one
As shown in fig. 1, the present embodiment provides a technical solution: a double-layer differential feed circularly polarized antenna applied to a millimeter wave frequency band mainly comprises a metal cover plate 101, a dielectric substrate 105, a strip-shaped differential feed line pair 106 and a parasitic structure 103.
The metal cover plate 101 is internally provided with a circular polarization radiator 102, and the circular polarization radiator 102 is a hollow metal tubular structure with the caliber gradually increasing from bottom to top.
The metal cover plate 101 is cut along the length direction of the strip-shaped differential feeder line pair 106 so as to meet the chip integration requirement; the width of the dielectric substrate 105 is the same as that of the metal cover plate 101; the lower surface of the dielectric substrate 105 is printed with an upper metal film, the upper surface of the dielectric substrate 105 is printed with a lower metal film, the upper metal film is provided with a circular opening 104, a strip-shaped differential feeder line pair 106 and a parasitic structure 103, and the periphery of the circular opening 104 is provided with a plurality of metalized through holes 107.
The pair of strip differential feeder lines 106 comprises two metal strip lines arranged in parallel; the tail ends of the strip-shaped differential feed line pair 106 are bent and then opened for 180 degrees to form a radiating arm similar to a dipole antenna, so as to realize coupling feed to the parasitic structure 103; the long side of the radiating arm forms a parallel relationship with the parasitic structure 103; the strip-shaped differential feeder line pair 106 and the long edge of the metal cover plate 101 form an included angle with a certain size, and a plurality of metalized through holes 107 are arranged on both sides of the strip-shaped differential feeder line.
The width of the strip differential feed line pair 106 and the spacing between the two metal strip lines are designed and adjusted according to transmission line theory.
The dielectric substrate 105 has a thickness h1Relative dielectric constant of epsilonr。
The radiating arm has a dimension of about 0.8 λ, where λ is the center frequency versus wavelength.
The long side dimension of the parasitic structure is about 0.4 lambda, wherein lambda is the wavelength corresponding to the center frequency.
The height of the metal cover plate 101 is h2。
As shown in fig. 2, a plurality of stepped impedance lines are disposed on one metal strip line of the strip-shaped differential feeder line pair 106 in this embodiment, so as to ensure that the electrical lengths of the two metal strip lines are the same.
The working principle of the embodiment is as follows: when the antenna is in operation, a signal is fed from one end of the strip differential feed line pair 106, coupled to the parasitic structure 103 through the radiating arm at its end, causing the radiating arm to resonate together with the parasitic structure 103. The radiated linearly polarized signal can be decomposed into a polarization component parallel to the short side of the metal cover 101 and a polarization component parallel to the long side of the metal cover 101 when passing through the circular polarized radiator 102. Because the sizes of the long side and the short side of the circular polarization radiator 102 are different, the propagation constants of the two polarization components are different, so that the phase difference of the two polarization components is close to 90 degrees when the two polarization components are propagated to the radiation port surface along the circular polarization radiator 102, and according to a circular polarization electromagnetic wave forming mechanism, the two polarization components are superposed to finally form circular polarization electromagnetic wave radiation to space.
Example two
As shown in fig. 3, fig. 3 is a linear array of the dual-layer differential feeding circular polarization antenna of this embodiment, with an array size of 8 × 8. The antenna unit in the linear array adopts the double-layer differential feed circularly polarized antenna in the first embodiment.
EXAMPLE III
As shown in fig. 4, fig. 4 is a double-layer differential feed circular polarization antenna array of the present embodiment, with an array size of 8 × 8. The antenna unit in the area array adopts the double-layer differential feed circularly polarized antenna in the first embodiment.
In summary, the double-layer differential feed circularly polarized antenna applied to the millimeter wave frequency band of the embodiment adopts a double-layer plate structure, so that the problem of lamination deviation is avoided, and meanwhile, the production cost can be greatly reduced; the two radiation arms and the parasitic structure of the differential feed pair are directly utilized, and the signal is radiated by the circularly polarized radiator with a special shape, so that the signal transmission process is simplified, and the complexity of the antenna is greatly reduced; the position of the differential feeder line pair is convenient for realizing the automatic surface pasting of the chip, can meet the chip integration requirement and is beneficial to the integration and the large-scale production of the system board.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A double-layer differential feed circularly polarized antenna is characterized in that: the metal cover plate is arranged on the dielectric substrate, the circular polarization radiator penetrates through the metal cover plate, and the strip-shaped differential feeder line pair and the parasitic structure are arranged on the dielectric substrate and are positioned between the metal cover plate and the dielectric substrate.
2. The dual-layer differential feed circularly polarized antenna of claim 1, wherein: the upper surface of the medium substrate is provided with an upper metal film, the lower surface of the medium substrate is provided with a lower metal film, and the banded differential feeder line pair and the parasitic structure are coplanar with the upper metal film.
3. The dual-layer differential feed circularly polarized antenna of claim 2, wherein: the circularly polarized radiator is of a tubular structure and comprises an alternating section, the bottom caliber of the alternating section is circular, the intersection of the circular shape with the coincident geometric center and the rectangle is taken along the bottom upward caliber shape, and the circular size of the upper caliber shape of the alternating section is gradually increased on the basis of the circular size of the bottom caliber shape.
4. The dual-layer differential feed circularly polarized antenna of claim 3, wherein: the circle center of the upper caliber-shaped circle and the circle center of the bottom caliber-shaped circle are on the same straight line.
5. The dual-layer differential feed circularly polarized antenna of claim 4, wherein: the circularly polarized radiator also comprises a transition section, wherein the top of the transition section is connected with the bottom of the alternating section, and the bottom of the transition section and the bottom of the alternating section are both circular in caliber shape with the same size.
6. The dual-layer differential feed circularly polarized antenna of claim 5, wherein: be provided with the confession on the circular trompil banded difference feeder is to the preformed opening who arranges banded difference feeder is to including two parallel arrangement the metal strip line of medium base plate upper surface, the end of metal strip line is provided with the radiation arm, the metal strip line with radiation arm integrated into one piece, two contained angle between the radiation arm of metal strip line is 180, the radiation arm with metal cover's long limit has certain contained angle.
7. The dual-layer differential feed circularly polarized antenna of claim 6, wherein: the strip-shaped differential feeder is characterized in that a plurality of stepped impedance lines used for ensuring that the electrical lengths of the two metal strip lines are the same are arranged on the metal strip lines, and the metal strip lines and the stepped impedance lines are integrally formed.
8. The dual-layer differential feed circularly polarized antenna of claim 7, wherein: the width of the parasitic structure is not consistent, and the long edge of the parasitic structure is arranged in parallel with the radiation arm at intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011339228.5A CN112421228A (en) | 2020-11-25 | 2020-11-25 | Double-layer differential feed circularly polarized antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011339228.5A CN112421228A (en) | 2020-11-25 | 2020-11-25 | Double-layer differential feed circularly polarized antenna |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100041608A (en) * | 2008-10-14 | 2010-04-22 | 한양대학교 산학협력단 | Circular polarization dielectric resonator antenna |
| CN106299690A (en) * | 2016-09-27 | 2017-01-04 | 华南理工大学 | A kind of differential feed Broadband circularly polarized antenna |
| CN106785408A (en) * | 2017-01-24 | 2017-05-31 | 桂林电子科技大学 | Broadband low section omnidirectional circular-polarized antenna |
| CN108963449A (en) * | 2018-07-20 | 2018-12-07 | 厦门大学 | A kind of multi-thread polarization reconfigurable antenna and its design method of integrated artificial magnetic conductor |
| CN110311214A (en) * | 2019-06-10 | 2019-10-08 | 西安电子科技大学 | Broadband high-isolation dual circularly polarized antenna based on single layer artificial surface phasmon |
| CN111786114A (en) * | 2020-07-15 | 2020-10-16 | 博微太赫兹信息科技有限公司 | Millimeter wave circularly polarized antenna based on differential feed |
| CN213782267U (en) * | 2020-11-25 | 2021-07-23 | 博微太赫兹信息科技有限公司 | Double-layer differential feed circularly polarized antenna applied to millimeter wave frequency band |
-
2020
- 2020-11-25 CN CN202011339228.5A patent/CN112421228A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100041608A (en) * | 2008-10-14 | 2010-04-22 | 한양대학교 산학협력단 | Circular polarization dielectric resonator antenna |
| CN106299690A (en) * | 2016-09-27 | 2017-01-04 | 华南理工大学 | A kind of differential feed Broadband circularly polarized antenna |
| CN106785408A (en) * | 2017-01-24 | 2017-05-31 | 桂林电子科技大学 | Broadband low section omnidirectional circular-polarized antenna |
| CN108963449A (en) * | 2018-07-20 | 2018-12-07 | 厦门大学 | A kind of multi-thread polarization reconfigurable antenna and its design method of integrated artificial magnetic conductor |
| CN110311214A (en) * | 2019-06-10 | 2019-10-08 | 西安电子科技大学 | Broadband high-isolation dual circularly polarized antenna based on single layer artificial surface phasmon |
| CN111786114A (en) * | 2020-07-15 | 2020-10-16 | 博微太赫兹信息科技有限公司 | Millimeter wave circularly polarized antenna based on differential feed |
| CN213782267U (en) * | 2020-11-25 | 2021-07-23 | 博微太赫兹信息科技有限公司 | Double-layer differential feed circularly polarized antenna applied to millimeter wave frequency band |
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