CN201134486Y - Comb-line cavity filter with resonance column of rectangular type - Google Patents
Comb-line cavity filter with resonance column of rectangular type Download PDFInfo
- Publication number
- CN201134486Y CN201134486Y CNU2007200774116U CN200720077411U CN201134486Y CN 201134486 Y CN201134486 Y CN 201134486Y CN U2007200774116 U CNU2007200774116 U CN U2007200774116U CN 200720077411 U CN200720077411 U CN 200720077411U CN 201134486 Y CN201134486 Y CN 201134486Y
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- line cavity
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- cavity
- tuning screw
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Abstract
The utility model relates to a comb line cavity filter with a rectangular resonant column, which comprises a cover plate, a cavity, a resonant column, a flange, a frequency tuning screw and a coupling tuning screw body, wherein the cover plate is arranged on the cavity, the resonant column is arranged on the bottom inside the cavity, the flange is arranged on the resonant column, the frequency tuning screw and the coupling tuning screw body are all arranged on the cover plate. Compared with the prior art, bandwidth percentage of filters which can be reached is greatly increased, signal transmission capacity and efficiency of communication systems such as base stations and repeaters and the like are increased, performance is stable and reliable and the structure is simple, and further the comb line cavity filter with a rectangular resonant column is adapted for mass production.
Description
Technical field
The utility model relates to the pectinate line cavity body filter, particularly contains the pectinate line cavity body filter of rectangle resonance pole.
Background technology
Fast development along with mobile communications industry, mobile phone and personal digital assistant device have obtained application more and more widely, and towards high-performance, high power capacity, high-quality direction develops, the radio frequency that present communication system is adopted has covered very wide frequency band, and in order to improve the large-capacity communication quality, broadband filter has been adopted in the mobile communication base station.The mobile communication transmittability is based on the basis of bandwidth, the wideer higher throughput of bandwidth support, to satisfy the more requirement of high-capacity speed transmission of user, reduce the expense of management information simultaneously, have higher spectrum efficiency than the communication mode of expanding carrier wave.The operation principle of broadband filter is identical with other filters, is used in communication system the signal frequency in the communication link being selected, and difference is that the fixed percentage bandwidth of broadband filter is bigger, and message capacity is bigger.
Fixed percentage bandwidth (Fractional Bandwidth) is defined as: filter bandwidht/filter center frequency.
The fixed percentage bandwidth that the pectinate line cavity body filter of the cylindrical resonance post of present employing can be accomplished is about 15%, sometimes can't satisfy the communication requirement of repeater or base station system, the technological means of taking by this patent, can make the fixed percentage bandwidth of pectinate line cavity body filter reach 20%-25%, thereby improved message capacity greatly, saved hardware resource.
Summary of the invention
The purpose of this utility model is exactly a kind of stable performance is provided in order to overcome the defective that above-mentioned prior art exists, contains the pectinate line cavity body filter of rectangle resonance pole reliably.
The purpose of this utility model can be achieved through the following technical solutions: the pectinate line cavity body filter that contains rectangle resonance pole, it is characterized in that, comprise cover plate, cavity, resonance post, flange, frequency tuning screw, tuning threaded body is coupled, described cover plate is located on the cavity, described resonance post is located at the cavity inner bottom part, described flange is located on the resonance post, and described frequency tuning screw, the tuning threaded body of coupling all are located on the cover plate.
Described cover plate and cavity are fixed by hold-down screw.
Described resonance post comprises two, and the bottom interconnects.
Described frequency tuning screw comprises two.
The tuning threaded body of described coupling comprises coupling tuning screw, suspension member, and this suspension member is fixed on coupling tuning screw bottom.
The tuning threaded body of described coupling is located in the middle of two frequency tuning screws.
Described frequency tuning screw is corresponding with resonance post inner chamber position.
Compared with prior art, the utility model has improved the fixed percentage bandwidth that filter can reach greatly; The signal transmission capacity and the efficient of communication systems such as base station, repeater have been improved; Stable performance, reliable; Simple in structure, be suitable for producing in batches.
Description of drawings
Fig. 1 is the structure of cover plate schematic diagram that the utility model contains the pectinate line cavity body filter of rectangle resonance pole;
Fig. 2 is the structural representation of the cavity of the utility model pectinate line cavity body filter of containing rectangle resonance pole;
Fig. 3 is the structural representation that the utility model contains the pectinate line cavity body filter of rectangle resonance pole.
Embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
As Fig. 1, Fig. 2, shown in Figure 3, the pectinate line cavity body filter that the utility model contains rectangle resonance pole comprises a cover plate 1 and a cavity 2, fix with hold-down screw between cover plate and the cavity, the cavity the inside scrapes out the groove shape, and at groove the inside installation resonance post 3, be equipped with flange 4 above the resonance post, the resonance post is the cuboid form, and frequency tuning screw 5 and the tuning threaded body 6 of coupling are housed on the cover plate.Because the resonance column bottom is directly to connect together,, realize that filter has very wide fixed percentage bandwidth so can produce very strong coupling, and can change the size of the coupling between the resonance post by the height of change coupling part, it is high more to connect convex, and it is big more to be coupled, otherwise then more little; In addition, can effectively change the size of two couplings between the resonator by regulating two threaded bodies between the resonator, threaded body extend into that the cavity part is many more, and column part is thick more, and it is strong more to be coupled, otherwise then more little.By above measure, can make the fixed percentage bandwidth of filter reach 20%-25%, realize the broadband coupled structure of pectinate line cavity body filter.
The electrical performance indexes of a band pass filter is that centre frequency is 905MHz, and three dB bandwidth is 792-1018MHz, and the center Insertion Loss is less than 1.4dB, and return loss is less than-15dB.
This wave filter technology index fixed percentage bandwidth is (1018-792)/905=25%, so should adopt the filter construction of broadband of the present utility model coupling, through the requirement that can touch the mark of its bandwidth of debugging, therefore proved the feasibility of the filter construction of the broadband that the utility model proposed coupling.
Claims (7)
1. the pectinate line cavity body filter that contains rectangle resonance pole, it is characterized in that, comprise cover plate, cavity, resonance post, flange, frequency tuning screw, tuning threaded body is coupled, described cover plate is located on the cavity, described resonance post is located at the cavity inner bottom part, described flange is located on the resonance post, and described frequency tuning screw, the tuning threaded body of coupling all are located on the cover plate.
2. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 1 is characterized in that described cover plate and cavity are fixed by hold-down screw.
3. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 1 is characterized in that described resonance post comprises two, and the bottom interconnects.
4. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 1 is characterized in that described frequency tuning screw comprises two.
5. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 1 is characterized in that, the tuning threaded body of described coupling comprises coupling tuning screw, suspension member, and this suspension member is fixed on coupling tuning screw bottom.
6. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 4 is characterized in that the tuning threaded body of described coupling is located in the middle of two frequency tuning screws.
7. the pectinate line cavity body filter that contains rectangle resonance pole according to claim 1 is characterized in that, described frequency tuning screw is corresponding with resonance post inner chamber position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200774116U CN201134486Y (en) | 2007-12-27 | 2007-12-27 | Comb-line cavity filter with resonance column of rectangular type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200774116U CN201134486Y (en) | 2007-12-27 | 2007-12-27 | Comb-line cavity filter with resonance column of rectangular type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134486Y true CN201134486Y (en) | 2008-10-15 |
Family
ID=40062754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200774116U Expired - Fee Related CN201134486Y (en) | 2007-12-27 | 2007-12-27 | Comb-line cavity filter with resonance column of rectangular type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134486Y (en) |
Cited By (3)
| 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 |
| WO2014029263A1 (en) * | 2012-08-24 | 2014-02-27 | 成都鼎桥通信技术有限公司 | A wide-band cavity filter |
| WO2017113139A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Resonant rod assembly, cavity filter, and communication device comprising cavity filter |
-
2007
- 2007-12-27 CN CNU2007200774116U patent/CN201134486Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014029263A1 (en) * | 2012-08-24 | 2014-02-27 | 成都鼎桥通信技术有限公司 | A wide-band cavity filter |
| CN102832429A (en) * | 2012-09-13 | 2012-12-19 | 深圳市大富科技股份有限公司 | Coaxial cavity filter |
| WO2017113139A1 (en) * | 2015-12-30 | 2017-07-06 | 深圳市大富科技股份有限公司 | Resonant rod assembly, cavity filter, and communication device comprising cavity filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20121227 |