CN113224533A - Coaxial waveguide filter antenna with adjustable frequency - Google Patents
Coaxial waveguide filter antenna with adjustable frequency Download PDFInfo
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- CN113224533A CN113224533A CN202110439451.5A CN202110439451A CN113224533A CN 113224533 A CN113224533 A CN 113224533A CN 202110439451 A CN202110439451 A CN 202110439451A CN 113224533 A CN113224533 A CN 113224533A
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- 238000003780 insertion Methods 0.000 claims abstract description 10
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 230000005284 excitation Effects 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims abstract description 4
- 238000005388 cross polarization Methods 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000004088 simulation Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000005404 monopole Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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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 frequency-adjustable coaxial waveguide filter antenna, which comprises a standard WR-90 waveguide, wherein two ends of the standard WR-90 waveguide are respectively provided with a waveguide excitation port and an antenna radiation port, the upper surface of the standard WR-90 waveguide is vertically inserted with a first tuning screw, a second tuning screw, a third tuning screw and a fourth tuning screw which are arranged in a row from one end to the other end, the inserting depth of the first tuning screw and the inserting depth of the fourth tuning screw are the same, the inserting depth of the second tuning screw and the inserting depth of the third tuning screw are the same, the lower surface of the standard WR-90 waveguide is vertically inserted with the first tuning screw, the second tuning screw and the third tuning screw, and the fifth tuning screw is positioned between the first tuning screw and the second tuning screw, the sixth tuning screw is positioned between the second tuning screw and the third tuning screw, the seventh tuning screw is positioned between the third tuning screw and the fourth tuning screw, and the insertion depths of the fifth tuning screw and the seventh tuning screw are the same. The invention can realize the adjustment of the center frequency of the antenna by adjusting the insertion depth of the screw, and has the advantages of simple and reliable structure, convenient processing, low loss, high performance and the like.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a frequency-adjustable coaxial waveguide filter antenna.
Background
Due to the rapid development of wireless communication systems, the performance requirements of various microwave devices are higher and higher. As an indispensable microwave device in a communication system, it is a hot spot of research to integrate more functions of the antenna. The reconfigurability of the microwave device is of great help to the production design. The frequency reconfigurable antenna can reduce the design and processing cost of the antenna and has great economic benefit. In addition, the coaxial waveguide resonator has a high unloaded quality factor, and thus is advantageous in loss compared with a microstrip resonator and the like. The coaxial waveguide filter antenna with adjustable frequency is designed to have great application value. Several researchers have proposed methods for implementing tunable frequency filtering antennas.
The prior art is investigated and known, and the details are as follows:
paul a. warr et al proposed in 2015 to design a frequency tunable antenna using a dielectric liquid. The adjustment of the frequency of the antenna is realized by controlling the height of the medium liquid. Their achievable tuning range covers 1.17GHz to 1.5 GHz.
In 2016, Abhishek Dey et al proposed designing a frequency tunable monopole antenna using liquid metal. The electric length of the monopole is changed by adjusting the length of the liquid metal, so that the resonant frequency of the monopole is adjustable.
In summary, there are many studies on implementing a tunable frequency filter antenna in the prior art, but there are some operations in which the impedance characteristic in the tunable range is unstable. Furthermore, many frequency tunable antennas are based on single mode antennas. Therefore, it is of great significance to design a simple and high-performance frequency tunable waveguide filter antenna.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a frequency-adjustable coaxial waveguide filter antenna which is simple and reliable in structure, convenient to process, low in loss and high in performance.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a frequency adjustable coaxial waveguide filtering antenna, the antenna includes standard WR-90 waveguide, the one end of standard WR-90 waveguide is provided with waveguide excitation port, and its other end is provided with the antenna radiation port, the upper surface of standard WR-90 waveguide is vertical cartridge respectively has first tuning screw, second tuning screw, third tuning screw and fourth tuning screw, first tuning screw, second tuning screw, third tuning screw and fourth tuning screw are at the one end of standard WR-90 waveguide to the direction of the other end in proper order at interval, and arrange into one row, and the depth of first tuning screw and fourth tuning screw inserted is the same, the depth of second tuning screw and third tuning screw inserted is the same, the lower surface of standard WR-90 waveguide is vertical cartridge respectively has fifth tuning screw, fifth tuning screw, The fifth tuning screw is positioned between the first tuning screw and the second tuning screw, the sixth tuning screw is positioned between the second tuning screw and the third tuning screw, the seventh tuning screw is positioned between the third tuning screw and the fourth tuning screw, the insertion depths of the fifth tuning screw and the seventh tuning screw are the same, and the adjustment of the central frequency of the antenna can be realized by adjusting the insertion depths of the screws.
Further, the first tuning screw, the second tuning screw, the third tuning screw, the fourth tuning screw, the fifth tuning screw, the sixth tuning screw and the seventh tuning screw are positioned on a central line of the standard WR-90 waveguide from one end to the other end thereof.
Furthermore, the adjustable range of the center frequency of the antenna is 9.25GHz-10.75GHz, the bandwidths under different tuning frequencies are all 200MHz, and the | S in the passband range11|<-10dB, gain greater than 7.2dBi in the tuning range, cross polarization less than-15 dBi, and filter characteristics of a third order chebyshev filter in the tuning range.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the adjustable range of the center frequency of the antenna is 9.25GHz to 10.75GHz and reaches the adjustable range of 1.5 GHz.
2. The antenna can maintain the bandwidth of 200MHz at each tuning frequency and is in the passband11|<-10dB。
3. The gain of the antenna is very flat in a pass band range, the gain is larger than about 7.2dBi in a tunable range, and the cross polarization is smaller than-15 dBi.
4. The antenna of the invention realizes the characteristic of low loss by utilizing the resonance design of the coaxial cavity.
5. The antenna of the invention can realize the filtering characteristic of the third-order Chebyshev filter in the tuning range.
6. The antenna has the advantages of simple and reliable structure, convenient processing, light weight, low processing cost, high selectivity, low loss and good application prospect.
Drawings
Fig. 1 is a 3D structural diagram of an antenna of the present invention.
Fig. 2 is a front view of the antenna of the present invention.
Fig. 3 is a top view of the antenna of the present invention.
FIG. 4 shows the S of the antenna of the present invention11The simulation result diagram of (1).
Fig. 5 is a graph showing simulation results of the gain of the antenna of the present invention.
Fig. 6 is a diagram of simulation results of directional patterns of the antenna of the present invention at different frequency points.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Referring to fig. 1 to 3, the frequency-tunable coaxial waveguide filtering antenna provided by this embodiment includes a standard WR-90 waveguide 1, one end of the standard WR-90 waveguide 1 is provided with a waveguide excitation port 9, the other end of the standard WR-90 waveguide is provided with an antenna radiation port 10, the upper surface of the standard WR-90 waveguide 1 is respectively and vertically inserted with a first tuning screw 2, a second tuning screw 3, a third tuning screw 4 and a fourth tuning screw 5, the first tuning screw 2, the second tuning screw 3, the third tuning screw 4 and the fourth tuning screw 5 are sequentially arranged in a row at intervals in a direction from one end of the standard WR-90 waveguide 1 to the other end, the first tuning screw 2 and the fourth tuning screw 5 are inserted at the same depth, and the second tuning screw 3 and the third tuning screw 4 are inserted at the same depth, a fifth tuning screw 6, a sixth tuning screw 7 and a seventh tuning screw 8 are respectively vertically inserted into the lower surface of the standard WR-90 waveguide 1, the fifth tuning screw 6, the sixth tuning screw 7 and the seventh tuning screw 8 are arranged at intervals in sequence from one end of the standard WR-90 waveguide 1 to the other end, and are arranged in a row in the same line with the first tuning screw 2, the second tuning screw 3, the third tuning screw 4 and the fourth tuning screw 5, and said fifth tuning screw 6 is located between the first tuning screw 2 and the second tuning screw 3, said sixth tuning screw 7 is located between the second tuning screw 3 and the third tuning screw 4, the seventh tuning screw 8 is positioned between the third tuning screw 4 and the fourth tuning screw 5, and the insertion depths of the fifth tuning screw 6 and the seventh tuning screw 8 are the same; the first tuning screw 2, the second tuning screw 3, the third tuning screw 4, the fourth tuning screw 5, the fifth tuning screw 6, the sixth tuning screw 7 and the seventh tuning screw 8 are positioned on a central line of the standard WR-90 waveguide 1 from one end to the other end, and the central frequency of the antenna can be adjusted by adjusting the insertion depth of the screws.
Referring to fig. 4, S of the antenna of the present embodiment is shown11And (5) a simulation result graph. From the simulation results, the tuning range of the center frequency of the antenna is 9.25-10.75 GHz. The designed antenna works stably in the whole tuning range and realizes the characteristics of a third-order Chebyshev filter. At different tuning frequencies, the bandwidth of the antenna is 200MHz and is | S within the pass band range11|<-10dB。
Referring to fig. 5, a graph showing the simulation result of the gain of the antenna of the present embodiment is shown. From the simulation results, it can be seen that the gain variation at different frequencies is flat and that the gain of the antenna is greater than 7.2dBi over the entire tuning frequency range.
Referring to fig. 6, a simulation result diagram of the directional patterns of the central frequency points of the antenna in this embodiment is shown. It can be seen from the figure that the patterns of the different tuning frequency points are substantially the same and their cross-polarization is less than-15 dBi.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (3)
1. A frequency-adjustable coaxial waveguide filter antenna is characterized in that: the antenna comprises a standard WR-90 waveguide, wherein a waveguide excitation port is arranged at one end of the standard WR-90 waveguide, an antenna radiation port is arranged at the other end of the standard WR-90 waveguide, a first tuning screw, a second tuning screw, a third tuning screw and a fourth tuning screw are respectively and vertically inserted into the upper surface of the standard WR-90 waveguide, the first tuning screw, the second tuning screw, the third tuning screw and the fourth tuning screw are sequentially arranged at intervals in the direction from one end of the standard WR-90 waveguide to the other end of the standard WR-90 waveguide and are arranged in a row, the insertion depths of the first tuning screw and the fourth tuning screw are the same, the insertion depths of the second tuning screw and the third tuning screw are the same, and a fifth tuning screw, a sixth tuning screw and a seventh tuning screw are respectively and vertically inserted into the lower surface of the standard WR-90 waveguide, the fifth tuning screw, the sixth tuning screw and the seventh tuning screw are sequentially arranged at intervals in a direction from one end of the standard WR-90 waveguide to the other end of the standard WR-90 waveguide, and are arranged in a row on the same straight line with the first tuning screw, the second tuning screw, the third tuning screw and the fourth tuning screw, the fifth tuning screw is positioned between the first tuning screw and the second tuning screw, the sixth tuning screw is positioned between the second tuning screw and the third tuning screw, the seventh tuning screw is positioned between the third tuning screw and the fourth tuning screw, the insertion depths of the fifth tuning screw and the seventh tuning screw are the same, and the adjustment of the center frequency of the antenna can be realized by adjusting the insertion depth of the screws.
2. A frequency tunable coaxial waveguide filter antenna according to claim 1, wherein: the first tuning screw, the second tuning screw, the third tuning screw, the fourth tuning screw, the fifth tuning screw, the sixth tuning screw and the seventh tuning screw are positioned on a central line of the standard WR-90 waveguide from one end to the other end of the standard WR-90 waveguide.
3. A frequency tunable coaxial waveguide filter antenna according to claim 1, wherein: the adjustable range of the center frequency of the antenna is 9.25GHz-10.75GHz, the bandwidths under different tuning frequencies are all 200MHz, and the | S in the passband range11|<-10dB, gain greater than 7.2dBi in the tuning range, cross polarization less than-15 dBi, and filter characteristics of a third order chebyshev filter in the tuning range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439451.5A CN113224533A (en) | 2021-04-23 | 2021-04-23 | Coaxial waveguide filter antenna with adjustable frequency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110439451.5A CN113224533A (en) | 2021-04-23 | 2021-04-23 | Coaxial waveguide filter antenna with adjustable frequency |
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| CN113224533A true CN113224533A (en) | 2021-08-06 |
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| CN202110439451.5A Pending CN113224533A (en) | 2021-04-23 | 2021-04-23 | Coaxial waveguide filter antenna with adjustable frequency |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000656A (en) * | 2022-04-13 | 2022-09-02 | 华南理工大学 | Adjustable filter and adjustable duplexer based on coaxial cavity resonator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB835575A (en) * | 1955-12-21 | 1960-05-25 | Standard Telephones Cables Ltd | An improved multiplexing and filtering device for the u.h.f. band |
| GB975680A (en) * | 1961-08-11 | 1964-11-18 | Standard Telephones Cables Ltd | Waveguide microwave mixer |
| GB1190495A (en) * | 1968-05-23 | 1970-05-06 | Standard Telephones Cables Ltd | Improvements in or relating to Waveguide Filters |
| GB1312506A (en) * | 1970-06-08 | 1973-04-04 | Standard Telephones Cables Ltd | Waveguide antenna |
| US20030006865A1 (en) * | 2001-07-03 | 2003-01-09 | Kim Young Su | Metal window filter assembly using non-radiative dielectric waveguids |
| US20120293282A1 (en) * | 2011-05-17 | 2012-11-22 | Giuseppe Frenna | Waveguide filter having coupling screws |
| CN108281794A (en) * | 2017-12-25 | 2018-07-13 | 西安电子科技大学 | Dual polarization open waveguide antenna based on step-like four ridges transition |
-
2021
- 2021-04-23 CN CN202110439451.5A patent/CN113224533A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB835575A (en) * | 1955-12-21 | 1960-05-25 | Standard Telephones Cables Ltd | An improved multiplexing and filtering device for the u.h.f. band |
| GB975680A (en) * | 1961-08-11 | 1964-11-18 | Standard Telephones Cables Ltd | Waveguide microwave mixer |
| GB1190495A (en) * | 1968-05-23 | 1970-05-06 | Standard Telephones Cables Ltd | Improvements in or relating to Waveguide Filters |
| GB1312506A (en) * | 1970-06-08 | 1973-04-04 | Standard Telephones Cables Ltd | Waveguide antenna |
| US20030006865A1 (en) * | 2001-07-03 | 2003-01-09 | Kim Young Su | Metal window filter assembly using non-radiative dielectric waveguids |
| US20120293282A1 (en) * | 2011-05-17 | 2012-11-22 | Giuseppe Frenna | Waveguide filter having coupling screws |
| CN108281794A (en) * | 2017-12-25 | 2018-07-13 | 西安电子科技大学 | Dual polarization open waveguide antenna based on step-like four ridges transition |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115000656A (en) * | 2022-04-13 | 2022-09-02 | 华南理工大学 | Adjustable filter and adjustable duplexer based on coaxial cavity resonator |
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