CN102025014A - Temperature compensation structure for 3.5GHz frequency filter - Google Patents
Temperature compensation structure for 3.5GHz frequency filter Download PDFInfo
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- CN102025014A CN102025014A CN2009101960765A CN200910196076A CN102025014A CN 102025014 A CN102025014 A CN 102025014A CN 2009101960765 A CN2009101960765 A CN 2009101960765A CN 200910196076 A CN200910196076 A CN 200910196076A CN 102025014 A CN102025014 A CN 102025014A
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- cushion block
- temperature compensation
- tuning screw
- compensation structure
- filter cavity
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- 229910001369 Brass Inorganic materials 0.000 claims description 4
- 239000010951 brass Substances 0.000 claims description 4
- 229910001374 Invar Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The invention relates to a temperature compensation structure for a 3.5GHz frequency filter, which comprises a filter cavity, a cushion block, a resonance rod, a cover plate and a tuning screw, wherein the filter cavity is cylindrical; the cushion block is disk-shaped, and is arranged at the bottom of the filter cavity and concentric with the filter cavity; the resonance rod is fixed on the cushion block; the tuning screw is positioned above the resonance rod, and the tuning screw and the resonance rod are concentric; and one end of the tuning screw is fixed on the cover plate through a nut. Compared with the prior art, the structure of the cushion block and the resonance rod can greatly reduce a gap on the premise of not changing the resonance frequency basically to further enhance the temperature compensation effect.
Description
Technical field
The present invention relates to filter, particularly relate to a kind of temperature compensation structure of 3.5GHz frequency band filter.
Background technology
Along with the continuous development of microwave technology, system operator is more and more higher to the performance requirement of microwave passive component, and wherein temperature drift is the important indicator of weighing the passive cavity filter performance always.Because the characteristic that metal self expands with heat and contract with cold make that in low temperature and hot environment, the resonance frequency of filter self changes, thereby free transmission range changes, loss is inserted in influence, return loss, indexs such as the outer inhibition of band.It is big more that temperature is floated amplitude, and the difficulty that other indexs realize is just high more, therefore how to reduce the amplitude of temperature drift as far as possible, becomes the problem that needs emphasis to consider in the Design of Filter.
Chang Yong temperature compensation now is to use different metal materials to come process chamber and resonant rod respectively, utilizes the difference of the intermetallic coefficient of expansion, and the distance between resonant rod top and the cavity top (below abbreviate gap as) is carried out temperature-compensating.Generally speaking, the cavity of filter often uses aluminium to process, and resonant rod can adopt brass according to the difference of frequency range, materials processings such as stainless steel.
Traditional temperature compensation, lower in frequency, below 3GHz, under the less situation of cavity, good compensation characteristic can be arranged.But along with frequency raises, cavity increases, and the situation of undercompensation will occur, is embodied in, and temperature raises, and band connection frequency is low to be floated; Otherwise the band connection frequency height floats.Should guarantee centre frequency, reduce gap again as far as possible, become the principal contradiction in the temperature-compensating process in this case.
Summary of the invention
Technical problem to be solved by this invention is exactly the temperature compensation structure that a kind of 3.5GHz frequency band filter is provided for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: a kind of temperature compensation structure of 3.5GHz frequency band filter, it is characterized in that, comprise filter cavity, cushion block, resonant rod, cover plate and tuning screw, described filter cavity is cylindrical, described cushion block is in the form of annular discs, this cushion block is located at the bottom of filter cavity, and it is concentric with filter cavity, described resonant rod is fixed on the cushion block, described tuning screw is positioned at the top of resonant rod, both are concentric, and an end of this tuning screw is fixed on the cover plate by nut.
The diameter of described filter cavity is 42mm.
The height of described cushion block is 4mm, and diameter is 16mm.
Described cushion block adopts the invar cushion block.
The height of described resonant rod is 6.8mm, and diameter is 6mm.
Described tuning screw diameter is 3mm.
Described tuning screw adopts brass screw.
Compared with prior art, cushion block of the present invention adds the form of resonant rod, can significantly reduce gap, thereby further strengthen effect temperature compensation not changing under the prerequisite of resonance frequency substantially.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of temperature compensation structure of 3.5GHz frequency band filter, comprise filter cavity 1, cushion block 2, resonant rod 3, cover plate 4 and tuning screw 5, described filter cavity 1 is cylindrical, described cushion block 2 is in the form of annular discs, this cushion block 2 is located at the bottom of filter cavity 1, and it is concentric with filter cavity 1, described resonant rod 3 is fixed on the cushion block 2, described tuning screw 5 is positioned at the top of resonant rod 3, both are concentric, and an end of this tuning screw 5 is fixed on the cover plate 4 by nut.
The diameter of described filter cavity is 42mm; The height of described cushion block is 4mm, and diameter is 16mm; Described cushion block adopts the invar cushion block; The height of described resonant rod is 6.8mm, and diameter is that the described tuning screw diameter of 6mm is 3mm; Described tuning screw adopts brass screw.
During assembling, cushion block and resonant rod with same screw at cavity bottom.Cavity depth 16mm, resonant rod, cushion block, cavity bottom boss height and be 12mm, frequency can reach requirement, and the distance at resonant rod distance from top cavity top is 4mm.And according to conventional design, the resonant rod height is 9mm, and the distance at top and cavity top is 7mm.So the design can reduce the distance between resonant rod top and the cavity top greatly, thereby plays temperature compensation function.
Claims (7)
1. the temperature compensation structure of a 3.5GHz frequency band filter, it is characterized in that, comprise filter cavity, cushion block, resonant rod, cover plate and tuning screw, described filter cavity is cylindrical, and described cushion block is in the form of annular discs, this cushion block is located at the bottom of filter cavity, and concentric with filter cavity, described resonant rod is fixed on the cushion block, and described tuning screw is positioned at the top of resonant rod, both are concentric, and an end of this tuning screw is fixed on the cover plate by nut.
2. the temperature compensation structure of a kind of 3.5GHz frequency band filter according to claim 1 is characterized in that, the diameter of described filter cavity is 42mm.
3. the temperature compensation structure of a kind of 3.5GHz frequency band filter according to claim 1 and 2 is characterized in that, the height of described cushion block is 4mm, and diameter is 16mm.
4. the temperature compensation structure of a kind of 3.5GHz frequency band filter according to claim 3 is characterized in that, described cushion block adopts the invar cushion block.
5. according to the temperature compensation structure of claim 1 or 3 described a kind of 3.5GHz frequency band filters, it is characterized in that the height of described resonant rod is 6.8mm, diameter is 6mm.
6. the temperature compensation structure of a kind of 3.5GHz frequency band filter according to claim 5 is characterized in that, described tuning screw diameter is 3mm.
7. the temperature compensation structure of a kind of 3.5GHz frequency band filter according to claim 6 is characterized in that, described tuning screw adopts brass screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910196076 CN102025014B (en) | 2009-09-22 | 2009-09-22 | Temperature compensation structure for 3.5GHz frequency filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910196076 CN102025014B (en) | 2009-09-22 | 2009-09-22 | Temperature compensation structure for 3.5GHz frequency filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102025014A true CN102025014A (en) | 2011-04-20 |
| CN102025014B CN102025014B (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910196076 Active CN102025014B (en) | 2009-09-22 | 2009-09-22 | Temperature compensation structure for 3.5GHz frequency filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN102025014B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106063028A (en) * | 2015-01-13 | 2016-10-26 | 日本电业工作株式会社 | Resonator and filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353875A (en) * | 1999-06-04 | 2002-06-12 | 奥根公司 | Temp-compensated rod resonator |
| CN201528033U (en) * | 2009-09-22 | 2010-07-14 | 奥雷通光通讯设备（上海）有限公司 | Temperature compensation device of 3.5 GHz frequency-band filter |
-
2009
- 2009-09-22 CN CN 200910196076 patent/CN102025014B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1353875A (en) * | 1999-06-04 | 2002-06-12 | 奥根公司 | Temp-compensated rod resonator |
| CN201528033U (en) * | 2009-09-22 | 2010-07-14 | 奥雷通光通讯设备（上海）有限公司 | Temperature compensation device of 3.5 GHz frequency-band filter |
Non-Patent Citations (2)
| Title |
|---|
| DARKO KAJFEZ,ETC.: "Temperature Dependence of Composite", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
| JAMES K.PLOURDE: "Application of Dielectric Resonators in Microwave Components", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106063028A (en) * | 2015-01-13 | 2016-10-26 | 日本电业工作株式会社 | Resonator and filter |
| CN106063028B (en) * | 2015-01-13 | 2018-11-23 | 日本电业工作株式会社 | Resonator and filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102025014B (en) | 2013-09-04 |
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Owner name: KAELUS COMMUNICATION EQUIPMENT (SHANGHAI) CO., LTD Free format text: FORMER NAME: ALLRIZON-TONGGUANG COMMUNICATIONS EQUIPMENT (SHANGHAI) CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 200335 Shanghai city Changning District Guang Shun building B No. 33 south room two floor of the South Tower Patentee after: Kai Kai communications equipment (Shanghai) Co., Ltd. Address before: 200335 Shanghai city Changning District Guang Shun building B No. 33 south room two floor of the South Tower Patentee before: Allrizon-Tongguang Communications Equipment (Shanghai) Co., Ltd. |