CN102881977B - Single-cavity filter with load coupling plate - Google Patents
Single-cavity filter with load coupling plate Download PDFInfo
- Publication number
- CN102881977B CN102881977B CN201110198137.9A CN201110198137A CN102881977B CN 102881977 B CN102881977 B CN 102881977B CN 201110198137 A CN201110198137 A CN 201110198137A CN 102881977 B CN102881977 B CN 102881977B
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- cavity
- coupling plate
- resonant column
- resonant
- ring flange
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Abstract
The invention relates to a single-cavity filter with a load coupling plate, which comprises a cavity, a cover plate and a resonant column, wherein the cavity is covered with the cover plate to form a closed resonant cavity; the resonant column is fixed in the cavity; a ring flange is arranged at the top of the resonant column; a gap is formed between the ring flange and the cover plate; the single-cavity filter further comprises the load coupling plate; the resonant column is sleeved with the load coupling plate; and the load coupling plate is fixed on the cavity. Compared with the prior art, the single-cavity filter has the advantages of simple process, reliable performances, lower resonant frequency and the like.
Description
Technical field
The present invention relates to a kind of filter, especially relate to a kind of single cavity body filter being provided with loading coupling plate.
Background technology
Microwave cavity is widely used in the correlation technique such as microwave signal source, microwave filter, is a kind of basic microwave component.
Consider selectivity and the power capacity of circuit, sometimes traditional resonant rod loads ring flange cannot meet the requirements of resonance frequency.
The resonance frequency in single chamber
l is closely related with the size of resonant rod.Resonant rod is more long thinner, and L is larger, and frequency is lower; Resonant rod is more short thicker, and L is less, and frequency is higher.C can reflect with resonant rod and the gap length of cover plate and the ring flange size of resonant rod.More the less then C of wide arc gap is larger for ring flange, and frequency is lower; Otherwise then C is less, frequency is higher.Use the conventional resonance manner loading ring flange, under certain size, the natural frequency of filter is higher.
Summary of the invention
Object of the present invention be exactly provide to overcome defect that above-mentioned prior art exists that a kind of technique is simple, dependable performance, resonance frequency are lower is provided with the single cavity body filter loading coupling plate.
Object of the present invention can be achieved through the following technical solutions:
A kind of single cavity body filter being provided with loading coupling plate, comprise cavity, cover plate and resonant column, described cover plate covers on cavity, and form the resonant cavity closed, described resonant column is fixed in cavity, described resonant column top is provided with ring flange, be provided with space between this ring flange and cover plate, it is characterized in that, also comprise loading coupling plate, this loading coupling plate is enclosed within resonant column, and is fixed on cavity.
The cross section of described loading coupling plate is circular, and its diameter is greater than resonant column ring flange.
Described loading coupling plate two ends are connected with cavity two side respectively by hold-down screw.
Be provided with dividing plate in the middle of described cavity, this divider height is lower than sidewall.7
Be provided with resonant column hold-down screw bottom described resonant column, and be fixedly connected with the dividing plate of cavity by this resonant column hold-down screw.
Described loading coupling plate is positioned at below ring flange.
Compared with prior art, the present invention loads coupling plate increase coupling capacitance by arranging, and when original cavity size and resonant column size constancy, reduce the resonance frequency of filter, technique is simple, dependable performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, be provided with and load the single cavity body filter of coupling plate, cover plate 1 covers on cavity 5, forms a closed resonant cavity, resonant column 2 is fixed in cavity 5 central baffle by resonant column hold-down screw 42, is provided with space between the ring flange 21 of resonant column 2 and cover plate 1.Be provided with below ring flange 21 and load coupling plate 3, be fixed on cavity 5 sidewall by hold-down screw 41.The diameter of this loading coupling plate 3 is greater than ring flange 21, for increasing coupling capacitance not changing under cavity 5 and resonant column 2 dimensional conditions, reduces resonance frequency.
Claims (4)
1. one kind is provided with the single cavity body filter loading coupling plate, comprise cavity, cover plate and resonant column, described cover plate covers on cavity, and form the resonant cavity closed, described resonant column is fixed in cavity, described resonant column top is provided with ring flange, be provided with space between this ring flange and cover plate, it is characterized in that, also comprise loading coupling plate, this loading coupling plate is enclosed within resonant column, and is fixed on cavity;
The cross section of described loading coupling plate is circular, and its diameter is greater than resonant column ring flange;
Described loading coupling plate two ends are connected with cavity two side respectively by hold-down screw.
2. a kind of single cavity body filter being provided with loading coupling plate according to claim 1, it is characterized in that, is provided with dividing plate in the middle of described cavity, this divider height is lower than sidewall.
3. a kind of single cavity body filter being provided with loading coupling plate according to claim 2, be is characterized in that, be provided with resonant column hold-down screw bottom described resonant column, and be fixedly connected with the dividing plate of cavity by this resonant column hold-down screw.
4. a kind of single cavity body filter being provided with loading coupling plate according to claim 1, it is characterized in that, described loading coupling plate is positioned at below ring flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110198137.9A CN102881977B (en) | 2011-07-15 | 2011-07-15 | Single-cavity filter with load coupling plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110198137.9A CN102881977B (en) | 2011-07-15 | 2011-07-15 | Single-cavity filter with load coupling plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102881977A CN102881977A (en) | 2013-01-16 |
| CN102881977B true CN102881977B (en) | 2015-02-25 |
Family
ID=47483216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110198137.9A Expired - Fee Related CN102881977B (en) | 2011-07-15 | 2011-07-15 | Single-cavity filter with load coupling plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102881977B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107615572B (en) * | 2014-12-30 | 2019-11-26 | 深圳市大富科技股份有限公司 | Cavity body filter and radio frequency remote equipment, signal receiving/transmission device and tower amplifier |
| CN108270058B (en) * | 2016-12-30 | 2020-11-10 | 京信通信技术(广州)有限公司 | Double-layer cavity combiner and coupling device thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600394B1 (en) * | 1999-09-24 | 2003-07-29 | Radio Frequency Systems, Inc. | Turnable, temperature stable dielectric loaded cavity resonator and filter |
| CN101645525A (en) * | 2009-08-07 | 2010-02-10 | 大富（深圳）科技有限公司 | Cavity body filter |
| CN101950832A (en) * | 2010-10-29 | 2011-01-19 | 昆山锦泰电子器材有限公司 | Filter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369383Y (en) * | 2008-12-26 | 2009-12-23 | 成都赛纳赛德科技有限公司 | Compact microwave resonant cavity |
| CN201533009U (en) * | 2009-09-18 | 2010-07-21 | 河北博威集成电路有限公司 | Device for loading electric capacity of coaxial resonant cavity |
-
2011
- 2011-07-15 CN CN201110198137.9A patent/CN102881977B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600394B1 (en) * | 1999-09-24 | 2003-07-29 | Radio Frequency Systems, Inc. | Turnable, temperature stable dielectric loaded cavity resonator and filter |
| CN101645525A (en) * | 2009-08-07 | 2010-02-10 | 大富（深圳）科技有限公司 | Cavity body filter |
| CN101950832A (en) * | 2010-10-29 | 2011-01-19 | 昆山锦泰电子器材有限公司 | Filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102881977A (en) | 2013-01-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20190715 |
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| CF01 | Termination of patent right due to non-payment of annual fee |