CN106654539B - Filtering antenna based on metal integrated structure - Google Patents
Filtering antenna based on metal integrated structure Download PDFInfo
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- CN106654539B CN106654539B CN201710036788.5A CN201710036788A CN106654539B CN 106654539 B CN106654539 B CN 106654539B CN 201710036788 A CN201710036788 A CN 201710036788A CN 106654539 B CN106654539 B CN 106654539B
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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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a filtering antenna based on a metal integrated structure, which comprises a metal resonant cavity, a conductor assembly, a metal antenna cavity and a probe, wherein a metal plate is embedded in the metal resonant cavity, a slot line is arranged on the metal plate, the top of the metal antenna cavity is opened, and the rest part of the metal antenna cavity is closed; the conductor component is fixed on the left wall of the metal resonant cavity and is connected with the left end of the metal plate, a circular through hole is formed between the right wall of the metal resonant cavity and the left wall of the metal antenna cavity, one end of the probe penetrates through the center of the circular through hole and then is connected with the right end of the metal plate, and the other end of the probe is suspended and is positioned in the metal antenna cavity. The invention can realize filtering and good antenna radiation performance, and has the advantages of large antenna radiation bandwidth, good frequency selectivity, small volume, simple design, easy processing, good performance and the like by utilizing the theory of multiple modes, and can well meet the requirements of modern communication systems.
Description
Technical Field
The invention relates to a filter antenna, in particular to a filter antenna based on a metal integrated structure, and belongs to the field of wireless communication.
Background
The filter antenna is an important device at the transmitting end and the receiving end in a modern communication system, and has the functions of receiving and transmitting signals, separating the signals, enabling useful signals to pass through without attenuation as much as possible, and suppressing useless signals from passing through with as great attenuation as possible, so that the filtering, transmitting and receiving of the signals can be realized. With the development of wireless communication technology, the frequency band between signals is narrower and narrower, which puts higher demands on the specification and reliability of the antenna. The filter antenna has the advantages of high frequency selectivity, low insertion loss, large power capacity, stable performance and the like, and has high application value. Many scholars have studied the frequency band isolation, frequency band selectivity and radiation performance of a filter antenna to achieve good duplex antenna performance by adjusting the filter, antenna performance and the filter to antenna matching.
With the rapid development of wireless communication technology, the radio frequency microwave devices are required to be more compact in size, and the development of various multifunctional devices has proved to be a good way to solve the problem, wherein the conventional filter and the antenna are two independent devices, and are independently designed in a wireless communication system, and the filter antenna is the integration of the antenna and the filter and has the functions of the two devices.
In recent years, many researches on a filter antenna are carried out, and document [1] proposes a method for comprehensively designing a filter and an antenna; the filter antenna synthesized by the documents [2] to [4] has good frequency selectivity; document [5] by introducing a short-circuit via; document [6] gives an antenna better rectangularity by adding a parasitic element.
Although the filter antennas have good filter selectivity, they cannot suppress higher harmonics, and radiation of higher harmonics causes additional power loss and signal interference.
Reference is made to:
[1]C.T.Chuang and S.J.Chung,“Synthesis and design of a new printed filtering antenna,”IEEE Trans.Antennas Propag.,vol.59,no.3,pp.1036-1042,Mar.2011.
[2]W.-J.Wu,Y.-Z.Yin,S.-L.Zuo,Z.-Y.Zhang,and J.-J.Xie,“A new compact filter-antenna for modern wireless communication systems,”IEEE Antennas Wireless Propag.Lett..,vol.10,pp.1131-1134,2011.
[3]C.-T.Chuang and S.-J.Chung“A compact printed filtering antenna using a ground-intruded coupled line resonator”,IEEE Trans.Antennas Propag.,vol.59,no.10,pp.3630-3637,Oct.2011.
[4]C.-K.Lin and S.-J.Chung“A compact filtering microstrip antenna with quasi-elliptic broadside antenna gain response”,IEEE Antennas Wireless Propag.Lett.,vol.10,pp.381-384,2011.
[5]S.W.Wong,T.G.Huang,C.X.Mao,Z.N.Chen,and Q.X.Chu“Planar filtering ultra-wideband(UWB)antenna with shorting pins”,IEEE Trans.Antennas Propag.,vol.61,no.2,pp.948-953,Feb.2013.
[6]J.Wu,Z.Zhao,Z.Nie,and Q.Liu,“A printed unidirectional antenna with improved upper band-edge selectivity using a parasitic loop”,IEEE Trans.Antennas Propag.,vol.63,no.4,pp.1832-1873,Apr.2015。
disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a filtering antenna based on a metal integrated structure, which can realize filtering and good antenna radiation performance, has the advantages of large antenna radiation bandwidth, good frequency selectivity, small volume, simple design, easy processing, good performance and the like by utilizing the theory of multiple modes, and can well meet the requirements of modern communication systems.
The aim of the invention can be achieved by adopting the following technical scheme:
a filtering antenna based on a metal integrated structure comprises a metal resonant cavity, a conductor assembly, a metal antenna cavity and a probe, wherein a metal plate is embedded in the metal resonant cavity, a slot line is formed in the metal plate, the top of the metal antenna cavity is opened, and the rest part of the metal antenna cavity is closed; the conductor component is fixed on the left wall of the metal resonant cavity and is connected with the left end of the metal plate, a circular through hole is formed between the right wall of the metal resonant cavity and the left wall of the metal antenna cavity, one end of the probe penetrates through the center of the circular through hole and then is connected with the right end of the metal plate, and the other end of the probe is suspended and is positioned in the metal antenna cavity.
As a preferable scheme, the slot line is a rectangular slot line.
As a preferable scheme, two rectangular groove lines are arranged, and the two rectangular groove lines are bilaterally symmetrical.
As a preferable scheme, the conductor assembly is composed of a coaxial outer conductor and a coaxial inner conductor, wherein the coaxial outer conductor is fixed on the left wall of the metal resonant cavity, one end of the coaxial inner conductor is connected with the coaxial outer conductor, and the other end of the coaxial inner conductor penetrates through the left wall of the metal resonant cavity and then is connected with the left end of the metal plate.
As a preferable scheme, the coaxial outer conductor adopts an SMA joint, the coaxial inner conductor adopts a coupling rod, and the tail end of the SMA joint is welded with one end of the coupling rod.
As a preferable scheme, four through holes are formed in the SMA connector, four threaded holes are formed in the left wall of the metal resonant cavity, the four threaded holes correspond to the four through holes, and the SMA connector is fixed to the left wall of the metal resonant cavity through the cooperation of screws passing through the through holes and the threaded holes.
As a preferable scheme, the metal resonant cavity is a rectangular metal resonant cavity.
As a preferable scheme, the metal antenna cavity is a rectangular metal antenna cavity, and the top of the rectangular metal antenna cavity is open, and the bottom, the left part, the right part, the front part and the rear part are closed.
As a preferred embodiment, the length of the probe is proportional to the wavelength at the center frequency.
Compared with the prior art, the invention has the following beneficial effects:
1. the filtering antenna provided by the invention is provided with the metal resonant cavity and the metal antenna cavity, the metal resonant cavity is internally embedded with a metal plate, a slot line is formed in the embedded metal plate, a filtering circuit with high frequency selectivity can be realized, a circular through hole capable of accommodating a probe is formed between the metal resonant cavity and the metal antenna cavity, one end of the probe penetrates through the center of the circular through hole and then is connected with the metal plate so as to receive energy of the metal plate subjected to slot line filtering, the other end of the probe is suspended in the metal antenna cavity, and the received energy is radiated out from the top opening of the metal antenna cavity.
2. The filter antenna has the advantages that the value of S11 is below-10 dB in the frequency range of 4.45-5.85 GHz, four obvious resonance points are provided, the requirements of a modern communication system can be well met, the characteristics of small volume, high rectangle degree, high Q value, simplicity in design and processing and the like are met, and the whole structure is firm due to the filter antenna based on a metal integrated structure.
Drawings
Fig. 1 is a schematic diagram of a filter antenna structure according to embodiment 1 of the present invention.
Fig. 2 is a front view of a filter antenna according to embodiment 1 of the present invention.
Fig. 3 is a left side view of the filter antenna of embodiment 1 of the present invention.
Fig. 4 is a top view of a filter antenna according to embodiment 1 of the present invention.
Fig. 5 is an electromagnetic simulation graph of the frequency response of the filter antenna according to embodiment 1 of the present invention.
Fig. 6 is a processing schematic diagram of a filter antenna according to embodiment 1 of the present invention.
The antenna comprises a 1-metal resonant cavity, a 2-metal antenna cavity, a 3-probe, a 4-metal plate, a 5-rectangular slot line, a 6-coaxial outer conductor, a 7-coaxial inner conductor, an 8-round through hole, a 9-lower metal structure, a 10-upper metal structure, a 11-first through hole lower half part, a 12-first lower cavity, a 13-second lower cavity, a 14-groove, a 15-second threaded hole, a 16-third threaded hole, a 17-second through hole lower half part, a 18-fourth threaded hole, a 19-first upper cavity, a 20-second upper cavity, a 21-fifth threaded hole, a 22-sixth threaded hole, a 23-second through hole upper half part, a 24-seventh threaded hole, a 25-first notch and a 26-second notch.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but embodiments of the present invention are not limited thereto.
Example 1:
as shown in fig. 1 to 4, the filter antenna of the present embodiment includes a metal resonant cavity 1, a conductor assembly, a metal antenna cavity 2, and a probe 3.
The metal resonant cavity 1 is a rectangular metal resonant cavity, a metal plate 4 is embedded in the metal resonant cavity, two rectangular slot lines 5 are formed in the metal plate 4, the two rectangular slot lines 5 are bilaterally symmetrical, and a high-frequency selective filter circuit is realized through the two rectangular slot lines 5.
The conductor assembly consists of a coaxial outer conductor 6 and a coaxial inner conductor 7, wherein the coaxial outer conductor 6 is fixed on the left wall of the metal resonant cavity 1, one end of the coaxial inner conductor 7 is connected with the coaxial outer conductor 6, the other end of the coaxial inner conductor passes through the left wall of the metal resonant cavity 1 and then is connected with the left end of the metal plate 4, and energy is input through the coaxial outer conductor 6 and transmitted to the metal plate 4 through the coaxial inner conductor 7.
In this embodiment, the coaxial outer conductor 6 adopts an SMA joint, the coaxial inner conductor 7 adopts a coupling rod, and the end of the SMA joint is welded with one end of the coupling rod; four through holes (not shown in the figure) are formed in the SMA connector, four threaded holes (not shown in the figure) are formed in the left wall of the metal resonant cavity 1, the four threaded holes correspond to the four through holes, and the SMA connector is fixed on the left wall of the metal resonant cavity 1 through the cooperation of screws passing through the through holes and the threaded holes.
The metal antenna cavity 2 is a rectangular metal antenna cavity, the top of the rectangular metal antenna cavity is open, the bottom, the left part, the right part, the front part and the rear part of the rectangular metal antenna cavity are closed, a circular through hole 8 is formed between the right wall of the metal resonant cavity 1 and the left wall of the metal antenna cavity 2, one end of the probe 3 penetrates through the center of the circular through hole 8 and then is connected with the right end of the metal plate 4 so as to receive energy filtered by the rectangular slot line 5 of the metal plate 4, and the other end of the probe is suspended and positioned in the metal antenna cavity 2 to radiate the received energy from the top opening of the metal antenna cavity 2; the part of the probe 3 in the metal antenna cavity 2 and the metal antenna cavity 2 form an antenna structure, the part of the probe 3 in the circular through hole 8 and the circular through hole 8 are used as coaxial lines together to connect the metal resonant cavity 1 and the metal antenna cavity 2, and the length of the probe 3 is in proportional relation with the wavelength under the corresponding central frequency.
The electromagnetic simulation curve of the frequency response of the filter antenna of this embodiment is shown in FIG. 5, in which S 11 Refers to the return loss of the input port, can be seen in the frequency range of 4.45-5.85 GHz, S 11 The values of the antenna are all below-10 dB, and four obvious resonance points are provided, so that the antenna is a multimode filter antenna, and the requirements of a modern communication system are well met.
As shown in fig. 6, the processing procedure of the filter antenna of this embodiment is as follows:
1) A rectangular metal block is cut and divided into a lower metal structure 9 and an upper metal structure 10, and the whole filter antenna consists of the lower metal structure 9, the upper metal structure 10, a metal plate 4, an SMA joint (coaxial outer conductor 6), a coupling rod (coaxial inner conductor 7) and a probe 3;
2) On the lower metal structure 9, two first threaded holes (not shown in the figures) for fixing SMA joints and a first through-hole lower half 11 for housing coupling rods are made near the left wall, and a first lower cavity 12 and a second lower cavity 13 are made; a groove 14 for fixing the metal plate 4 is formed on the front and rear walls of the first lower cavity 12, a second threaded hole 15 for fixing a screw is formed on the groove 14, a third threaded hole 16 for fixing a screw is formed on the front and rear walls of the second lower cavity 13, and a second through hole lower half 17 for accommodating the probe 3 is formed between the first lower cavity 12 and the second lower cavity 13;
3) On the upper metal structure 10, two fourth threaded holes 18 for fixing SMA joints and an upper half of a first through hole (not shown in the figure) for accommodating the coupling rod are made near the left wall, and a first upper cavity 19 and a second upper cavity 20 are made, the first upper cavity 19 is not completely opened, and the second upper cavity 20 is completely opened; a fifth screw hole 21 for fixing a screw is formed in the front and rear walls of the first upper cavity 19, the position of the fifth screw hole 21 corresponds to the position of the second screw hole 15, a sixth screw hole 22 for fixing a screw is formed in the front and rear walls of the second upper cavity 20, the position of the sixth screw hole 22 corresponds to the position of the third screw hole 16, and a second through hole upper half portion 23 for accommodating the probe 3 is formed between the first upper cavity 19 and the second upper cavity 20;
4) Two rectangular groove lines 5 and a seventh threaded hole 24 for fixing a screw are formed in the metal plate 4, the positions of the seventh threaded hole 24 correspond to the positions of the second threaded hole 15 and the fifth threaded hole 21, a first notch 25 for fixing a coupling rod is formed in the left end of the metal plate 4, and a second notch 26 for fixing a probe 3 is formed in the right end of the metal plate 4;
5) The metal plate 4 is placed on the groove 14 of the lower metal structure 9, the coupling rod is welded to the first notch 25 of the metal plate 4, the probe 3 is welded to the second notch 26 of the metal plate 4, the upper metal structure 10 is covered, the first lower cavity 12 and the first upper cavity 19 form the metal resonant cavity 1, the second lower cavity 13 and the second upper cavity 20 form the metal antenna cavity 2, the first lower half 11 and the first upper half form the through hole structure capable of accommodating the coupling rod, the second lower half 17 and the second upper half 23 form the circular through hole 8 capable of accommodating the probe 3, the SMA joint is locked on the metal resonant cavity 1 through the screw, the upper metal structure 10, the metal plate 4 and the lower metal structure 9 are fixed through the screw, the whole filter antenna is assembled, and finally a test is performed.
In the above embodiment, the metal materials used in the metal resonant cavity 1, the metal antenna cavity 2, the metal plate 4, and the conductor component may be any one of aluminum, iron, tin, copper, silver, gold, and platinum, or may be an alloy of any one of aluminum, iron, tin, copper, silver, gold, and platinum.
In summary, the filter antenna of the invention has a metal resonant cavity and a metal antenna cavity, a metal plate is embedded in the metal resonant cavity, a slot line is formed on the embedded metal plate to realize a filter circuit with high frequency selectivity, a circular through hole capable of accommodating a probe is formed between the metal resonant cavity and the metal antenna cavity, one end of the probe is connected with the metal plate after passing through the center of the circular through hole to receive the energy of the metal plate filtered by the slot line, the other end is suspended in the metal antenna cavity to radiate the received energy from the top opening of the metal antenna cavity, and the whole filter antenna has the advantages of small volume, simple design, easy processing, good performance and the like, and can well meet the requirements of modern communication systems.
The above-mentioned embodiments are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can make equivalent substitutions or modifications according to the technical solution and the inventive concept of the present invention within the scope of the present invention disclosed in the present invention patent, and all those skilled in the art belong to the protection scope of the present invention.
Claims (7)
1. A filtering antenna based on metal integrated structure is characterized in that: the antenna comprises a metal resonant cavity, a conductor assembly, a metal antenna cavity and a probe, wherein a metal plate is embedded in the metal resonant cavity, a slot line is formed in the metal plate, the metal antenna cavity is a rectangular metal antenna cavity, the top opening of the rectangular metal antenna cavity is closed, the bottom, the left part, the right part, the front part and the rear part are closed, a circular through hole is formed between the right wall of the metal resonant cavity and the left wall of the metal antenna cavity, one end of the probe penetrates through the center of the circular through hole and then is connected with the right end of the metal plate so as to receive energy filtered by the rectangular slot line by the metal plate, and the other end of the probe is suspended and positioned in the metal antenna cavity and radiates the received energy from the top opening of the metal antenna cavity; the part of the probe in the metal antenna cavity and the metal antenna cavity form an antenna structure, the part of the probe in the circular through hole and the circular through hole are used as coaxial lines together and used for connecting the metal resonant cavity and the metal antenna cavity, and the length of the probe is in proportional relation with the wavelength under the condition that the center frequency corresponds.
2. A filtering antenna based on a metal integrated structure according to claim 1, characterized in that: the slot line is a rectangular slot line.
3. A filtering antenna based on a metal integrated structure according to claim 2, characterized in that: the number of the rectangular groove lines is two, and the two rectangular groove lines are bilaterally symmetrical.
4. A filtering antenna based on a metal integrated structure according to claim 1, characterized in that: the conductor assembly consists of a coaxial outer conductor and a coaxial inner conductor, wherein the coaxial outer conductor is fixed on the left wall of the metal resonant cavity, one end of the coaxial inner conductor is connected with the coaxial outer conductor, and the other end of the coaxial inner conductor penetrates through the left wall of the metal resonant cavity and then is connected with the left end of the metal plate.
5. The filtering antenna based on metal integrated structure of claim 4, wherein: the coaxial outer conductor adopts an SMA joint, the coaxial inner conductor adopts a coupling rod, and the tail end of the SMA joint is welded with one end of the coupling rod.
6. A filter antenna based on a metal integrated structure according to claim 5, characterized in that: four through holes are formed in the SMA connector, four threaded holes are formed in the left wall of the metal resonant cavity, the four threaded holes correspond to the four through holes, and the SMA connector is fixed to the left wall of the metal resonant cavity through the cooperation of screws passing through the through holes and the threaded holes.
7. A filtering antenna based on a metal integrated structure according to any of claims 1-6, characterized in that: the metal resonant cavity is a rectangular metal resonant cavity.
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| CN201710036788.5A CN106654539B (en) | 2017-01-18 | 2017-01-18 | Filtering antenna based on metal integrated structure |
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| CN201710036788.5A CN106654539B (en) | 2017-01-18 | 2017-01-18 | Filtering antenna based on metal integrated structure |
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| CN106654539B true CN106654539B (en) | 2023-07-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221747B (en) * | 2017-07-03 | 2023-06-20 | 华南理工大学 | Stacked cavity filter antenna |
| CN108470976B (en) * | 2018-04-11 | 2019-10-11 | 西安交通大学 | A kind of W-waveband microfilter antenna based on rectangular coaxial cable architecture |
| CN109560356B (en) * | 2018-11-22 | 2020-08-18 | 深圳大学 | Double-frequency filter |
| CN113194704B (en) * | 2021-05-10 | 2022-09-27 | 西安电子科技大学 | Method for protecting working circuit in cavity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313797B1 (en) * | 1998-10-22 | 2001-11-06 | Murata Manufacturing Co., Ltd. | Dielectric antenna including filter, dielectric antenna including duplexer, and radio apparatus |
| CN102522627A (en) * | 2011-12-09 | 2012-06-27 | 东南大学 | Vertical polarization directional-printing filtering antenna |
| CN104241744A (en) * | 2014-09-03 | 2014-12-24 | 华南理工大学 | Wideband filter adopting single-cavity five-mode cavity resonator |
| CN105428765A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Metal resonant cavity filter embedded with slotted metal plate with low-frequency zero point |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3012684B1 (en) * | 2013-10-29 | 2015-11-13 | Inst Francais De Rech Pour L’Expl De La Mer – Ifremer | UNDERWATER RADIO FREQUENCY ANTENNA |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6313797B1 (en) * | 1998-10-22 | 2001-11-06 | Murata Manufacturing Co., Ltd. | Dielectric antenna including filter, dielectric antenna including duplexer, and radio apparatus |
| CN102522627A (en) * | 2011-12-09 | 2012-06-27 | 东南大学 | Vertical polarization directional-printing filtering antenna |
| CN104241744A (en) * | 2014-09-03 | 2014-12-24 | 华南理工大学 | Wideband filter adopting single-cavity five-mode cavity resonator |
| CN105428765A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Metal resonant cavity filter embedded with slotted metal plate with low-frequency zero point |
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