CN106229592A - A kind of low-frequency range cavity band-pass filter - Google Patents
A kind of low-frequency range cavity band-pass filter Download PDFInfo
- Publication number
- CN106229592A CN106229592A CN201610833115.8A CN201610833115A CN106229592A CN 106229592 A CN106229592 A CN 106229592A CN 201610833115 A CN201610833115 A CN 201610833115A CN 106229592 A CN106229592 A CN 106229592A
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- Prior art keywords
- inner wire
- frequency range
- pass filter
- segment
- low
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20309—Strip line filters with dielectric resonator
Abstract
The invention discloses a kind of low-frequency range cavity band-pass filter, relate to the communications field.The present invention includes coupled structure, tuning plug and cover plate between chamber shell, multiple resonator cavity, input and output coupled structure, chamber；Each resonator cavity is square-outside and round-inside coaxial cavity, it is made up of inner wire and outer conductor, inner wire is made up of one or more layers umbrella loading structure and shorted segment, each layer of umbrella loading structure is made up of inner wire section and loaded segment, the lower surface of loaded segment is connected with the upper surface of inner wire section, the undermost lower surface of inner wire section is connected with the upper surface of shorted segment, and the upper surface of the loaded segment of next layer of lower surface and its of the inner wire section of other layers is connected；Outer conductor loading end uses the structure matched with inner wire to realize.This wave filter can realize bearing the VHF band-pass filter of frequency band design of relatively high power by less volume, and the difficulty that processing realizes is little.
Description
Technical field
The present invention relates to a kind of low-frequency range cavity band-pass filter in the communications field, be particularly well-suited to communication system radio frequency
Transmitting device in channel.
Background technology
At present, low-frequency range frequency takies more, and frequency range is more crowded, and interference phenomenon is serious.In a general communications system, penetrate
Frequency part uses band filter or band elimination filter to filter the interference outside passband.
But owing to low-frequency range frequency is relatively low, for high-power communication system, the volume of radiofrequency tips device can be very
Huge, so the most typically there being two selections: one uses band elimination filter to suppress the interference outside band, two band elimination filter resonance
The slow wave spiral inner conductor structure of Unit selection small volume, such as patent No. CN201868544U patent of invention and the patent No.
The patent of invention of CN201420768750.9.
Patent No. CN201868544U patent of invention, describes and realizes the resistance filter of VHF wave band miniaturization cavity band with helix
The example of ripple device, it is adaptable to complete the transmitting device of suppression interference semiotic function in the channel of VHF multi-band communication system；Including spiral shell
Rotation resonator, subtending cable and threeway, together with helical resonator and subtending cable are cascaded to by threeway；Transmission signal is from input
End enters and arrives outfan through subtending cable, threeway and helical resonator；Described helical resonator is by spiral inner wire, tuning
Bar, dielectric support, interface and outer conductor composition, be deep into the depth of helical resonator and realize electric capacity by changing tuning plug and add
Carry, complete frequency tuning.Working frequency range of the present invention is the lowest, small volume, meet communication equipment to wave filter product to volume
Miniaturization, bear high-power, the requirement of stable performance
The patent of invention of patent No. CN201420768750.9, discloses a kind of low-frequency range high power resonator and with low
Frequently the electricity of high power resonator adjusts band elimination filter.Low-frequency resonator includes outer conductor, inner wire, tuning plug, dielectric support, outward
Fixedly mounting inner wire bottom conductor, its top is provided with groove, groove built with the finger-type reed of beryllium-bronze material, tuning plug from
Groove stretches into inner wire, with finger-type elasticity of spring leaf shorted contacts；Inner wire is hollow metal cartridge, connects with outer conductor conduction
Touching, its outer wall middle and lower part is provided with the spiral trajectory fluting of hollow out；Inner wire outer wall is provided with two-layer projecting slot, and dielectric support is with interior
Conductor intersects vertically, and is fixedly mounted in the two-layer projecting slot of inner wire outer wall.High power electricity adjusts band elimination filter, by connecting successively
The input interface that connects, output interface, more than one electric tuning unit composition.It not only achieves, and band elimination filter is electronic changes frequency,
The miniaturization under ultralow frequency range and broad tuning frequency range, high-power requirement can also be met.
The band elimination filter of these multi-forms, first uses spiral resonator cavity, and the slow-wave structure of helix effectively shortens
The length of inner wire, but also reduce the Q-value of cavity and cavity bears the ability of power simultaneously；Second cavity body filter uses
Band resistance form, the most adjustable or fixed form, the most all the interference carrying outer certain point can only there be is inhibition, and to logical
The interference of the outer multiple frequencies of band is the most helpless, and this is clearly inadequate for VHF system.
Summary of the invention
It is an object of the invention to the loading structure utilizing " umbrella " to be layered, the low-frequency range band designing a kind of specific form leads to
Cavity body filter.Resonator cavity uses the square-outside and round-inside strong loading form of coaxial cavity electric capacity, and between chamber, coupled structure uses conventional rectangle
Open-celled structure form, input and output coupling is used conventional coupled-loop structures form etc., is realized by less volume in low-frequency range
Can be with the band cavity fluid filter of degree of suppression big band limits rejection ability and relatively high power ability to bear.
The object of the present invention is achieved like this:
A kind of low-frequency range cavity band-pass filter, including between chamber shell 1, multiple resonator cavity 2, input and output coupled structure 3, chamber
Coupled structure 4 and cover plate 7, the sidewall of chamber shell 1 is provided with input and output coupled structure 3, and chamber shell 1 and cover plate 7 are fixedly connected shape
Become seal cavity, be disposed with multiple resonator cavity 2 along signal propagation direction between chamber shell 1 and cover plate 7, adjacent resonators 2 it
Between cascaded by coupled structure 4 between chamber, each resonator cavity 2 is made up of inner wire and outer conductor；Inner wire is by one or more layers umbrella
Shape loading structure 5 and shorted segment composition, each layer of umbrella loading structure 5 is made up of inner wire section 8 and loaded segment 9, inner wire section 8
Geomery all identical with shorted segment 10, the lower surface of loaded segment 9 is connected with the upper surface of inner wire section 8；Undermost
The lower surface of inner wire section 8 is connected with the upper surface of shorted segment, the lower surface of the inner wire section 8 of other layers and its next layer
The upper surface of loaded segment 9 is connected, and the center of inner wire section 8, loaded segment 9 and shorted segment 10 coincides.
Wherein, the structure of resonator cavity outer conductor loading end matches with the structure of inner wire umbrella loading structure 5, inside and outside lead
Gap length between body is born power decision by band filter.
Wherein, inner wire umbrella loading structure 5 is 3 layers, generally circular in shape, the rectangular or square when of its loaded segment.
Wherein, the size of the loaded segment 9 of the superiors is for realizing the frequency regulation of each resonator cavity 2.
Wherein, described input and output coupled structure 3 is coupling ring form, and between chamber, coupled structure 4 uses rectangle window shape
Formula realizes.
Wherein, described cover plate 7 is provided with tuning plug 6, and tuning plug 6 is used for finely tuning the coupling amount of coupled structure 4 between chamber.
Wherein, the described strong loading form of coaxial cavity that resonator cavity 2 is square-outside and round-inside.
The present invention has the advantage that compared with background technology
1, the open end interpolation umbrella layer loading structure at resonator cavity of the present invention effectively reduces the length of inner wire, reaches
The purpose of design is realized to smaller size smaller.
2, the resonator cavity of the present invention uses coaxial cavity form, can obtain higher cavity Q-value, compared with spiral resonator cavity,
There is processing technique simple, stable performance, the feature that insertion loss is low.
3, the band filter of the present invention is compared with band elimination filter, it is possible to achieve the outer large range of AF panel of passband
Characteristic.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of low-frequency range band filter of the present invention；
Fig. 2 is the A-A sectional view of a kind of low-frequency range band filter of the present invention；
Fig. 3 is the umbrella loading structure schematic diagram of the embodiment of the present invention.
Detailed description of the invention
The present invention will be further described in detail below in conjunction with the accompanying drawings.
By accompanying drawing 1 and accompanying drawing 2 it can be seen that a kind of low-frequency range cavity band-pass filter, including chamber shell 1, multiple resonator cavity 2
Coupled structure 4, tuning plug 6 and cover plate 7 between (as shown in dotted line frame in Fig. 2), input and output coupled structure 3, chamber.The side of chamber shell 1
Wall is provided with input coupled structure and output coupled structure, and chamber shell 1 and cover plate 7 are fixedly connected to be formed and seal cavity, chamber shell 1 He
It is disposed with multiple resonator cavity 2 along signal propagation direction, by coupled structure 4 between chamber between adjacent resonators 2 between cover plate 7
Cascade, cover plate 7 is provided with for finely tuning the tuning plug 6 of coupled structure 4 coupling amount between chamber.
Resonator cavity 2 is the strong loading form of coaxial cavity of square-outside and round-inside, and each resonator cavity 2 is made up of inner wire and outer conductor.
As shown in Figure 3, inner wire is made up of one or more layers umbrella loading structure 5 and shorted segment 10, each layer of umbrella loading structure 5
Being made up of inner wire section 8 and loaded segment 9, the lower surface of loaded segment 9 is connected with the upper surface of inner wire section 8；In undermost
The lower surface of conductor segment 8 is connected with the upper surface of shorted segment 10, the lower surface of the inner wire section 8 of other layers and its next layer
The upper surface of loaded segment 9 is connected.
Generally circular in shape, the rectangular or square when of loaded segment 9, is circular in embodiment；The size of inner wire section 8 and short circuit
The shape of section 10, size are the most identical；The center of loaded segment 9, inner wire section 8 and shorted segment 10 coincides.Knot is loaded with 1 layer of umbrella
As a example by structure 5, the lower surface of inner wire section 8 is connected with the upper surface of shorted segment, the lower surface of loaded segment 9 and inner wire section 8
Upper surface is connected；As a example by 3 layers of umbrella loading structure 5, the lower surface of orlop inner wire section 8 and the upper surface phase of shorted segment
Connecting, the lower surface of the inner wire section 8 in intermediate layer is connected with the upper surface of undermost loaded segment 9, the inner wire of the superiors
The section lower surface of 8 is connected with the upper surface of the loaded segment 9 in intermediate layer.Each layer of umbrella loading structure 5 can be individually designed,
Requiring and on the premise of standardized designs meeting frequency loading, the size of the loaded segment 9 of the superiors can be used for realizing respectively
The frequency regulation of resonator cavity 2.
The structure of resonator cavity outer conductor loading end matches with the structure of inner wire umbrella loading structure 5, internal and external conductor it
Between gap length born power decision by band filter.
Input and output coupled structure 3 is coupling ring form, and between chamber, coupled structure 4 uses rectangular window form to realize.
This low-frequency range cavity band-pass filter can realize bearing the band filter of relatively high power by less volume
Design, for realizing the outer inhibitory action disturbing signal on a large scale of communication system regiment commander of low-frequency range particularly VHF frequency range.
Claims (8)
1. a low-frequency range cavity band-pass filter, including chamber shell (1), multiple resonator cavity (2), input and output coupled structure (3),
Coupled structure (4) and cover plate (7) between chamber, the sidewall of chamber shell (1) is provided with input and output coupled structure (3), chamber shell (1) and cover plate
(7) it is fixedly connected to form sealing cavity, between chamber shell (1) and cover plate (7), is disposed with multiple resonance along signal propagation direction
Chamber (2), is cascaded by coupled structure (4) between chamber between adjacent resonators (2), and each resonator cavity (2) is by inner wire and outer conductor
Composition, it is characterised in that: described inner wire is made up of one or more layers umbrella loading structure (5) and shorted segment (10), each
Layer umbrella loading structure (5) is made up of inner wire section (8) and loaded segment (9), and the geomery of inner wire section (8) is equal and shorted segment
(10) identical, the lower surface of loaded segment (9) is connected with the upper surface of inner wire section (8)；Under undermost inner wire section (8)
Surface is connected with the upper surface of shorted segment (10), the lower surface of the inner wire section (8) of other layers and the loaded segment of its next layer
(9) upper surface is connected, and the center of inner wire section (8), loaded segment (9) and shorted segment (10) coincides.
A kind of low-frequency range cavity band-pass filter the most according to claim 1, it is characterised in that: the knot of outer conductor loading end
Structure matches with the structure of umbrella loading structure (5), and the gap length between internal and external conductor is born power by band filter
Determine.
A kind of low-frequency range cavity band-pass filter the most according to claim 1, it is characterised in that: the loaded segment of the superiors
(9) size is used for realizing the frequency regulation of each resonator cavity (2).
A kind of low-frequency range cavity band-pass filter the most according to claim 1, it is characterised in that: described umbrella loads knot
Structure (5) is 3 layers.
A kind of low-frequency range cavity band-pass filter the most according to claim 1, it is characterised in that: described umbrella loads knot
Generally circular in shape, the rectangular or square when of the loaded segment (9) of structure (5).
6. according to the arbitrary described a kind of low-frequency range cavity band-pass filter of claim 1-5, it is characterised in that: described input
Output coupled structure (3) is coupling ring form, and between chamber, coupled structure (4) uses rectangular window form to realize.
7. according to the arbitrary described a kind of low-frequency range cavity band-pass filter of claim 1-5, it is characterised in that: described cover plate
(7) being provided with tuning plug (6), tuning plug (6) is used for finely tuning the coupling amount of coupled structure between chamber (4).
8. according to the arbitrary described a kind of low-frequency range cavity band-pass filter of claim 1-5, it is characterised in that: described resonance
Chamber (2) is the strong loading form of coaxial cavity of square-outside and round-inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833115.8A CN106229592A (en) | 2016-09-20 | 2016-09-20 | A kind of low-frequency range cavity band-pass filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833115.8A CN106229592A (en) | 2016-09-20 | 2016-09-20 | A kind of low-frequency range cavity band-pass filter |
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| CN106229592A true CN106229592A (en) | 2016-12-14 |
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| CN201610833115.8A Pending CN106229592A (en) | 2016-09-20 | 2016-09-20 | A kind of low-frequency range cavity band-pass filter |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN105070987A (en) * | 2015-08-05 | 2015-11-18 | 中国电子科技集团公司第五十四研究所 | Band-pass filter with adjustable C wave band |
| CN105337008A (en) * | 2015-12-11 | 2016-02-17 | 深圳市虹远通信有限责任公司 | Low frequency coaxial cavity filter and manufacturing method thereof |
| CN206040918U (en) * | 2016-09-20 | 2017-03-22 | 中国电子科技集团公司第五十四研究所 | Low -frequency range cavity band pass filter |
-
2016
- 2016-09-20 CN CN201610833115.8A patent/CN106229592A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| CN105070987A (en) * | 2015-08-05 | 2015-11-18 | 中国电子科技集团公司第五十四研究所 | Band-pass filter with adjustable C wave band |
| CN105337008A (en) * | 2015-12-11 | 2016-02-17 | 深圳市虹远通信有限责任公司 | Low frequency coaxial cavity filter and manufacturing method thereof |
| CN206040918U (en) * | 2016-09-20 | 2017-03-22 | 中国电子科技集团公司第五十四研究所 | Low -frequency range cavity band pass filter |
Non-Patent Citations (1)
| Title |
|---|
| 王清芬 等: "应用HFSS设计40MHz腔体滤波器", 《无线电工程》 * |
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Application publication date: 20161214 |