CN201927688U - Cross-coupling unit - Google Patents
Cross-coupling unit Download PDFInfo
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- CN201927688U CN201927688U CN2010205170881U CN201020517088U CN201927688U CN 201927688 U CN201927688 U CN 201927688U CN 2010205170881 U CN2010205170881 U CN 2010205170881U CN 201020517088 U CN201020517088 U CN 201020517088U CN 201927688 U CN201927688 U CN 201927688U
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- cross
- resonant cavity
- resonant
- couplings
- chamber wall
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Abstract
The utility model relates to a cross-coupling unit. The cross-coupling unit comprises a first resonant cavity, a second resonant cavity and a sealing cover plate arranged at openings of the first and the second resonant cavities in a sealed manner, wherein, a window cavity wall is arranged between the first resonant cavity and the second resonant cavity; a first resonant column and an output port are arranged in the first resonant cavity; a second resonant column and an input port are arranged in the second resonant cavity; a cross-coupling rod with one end connected with the output port and the other end extending into the second resonant cavity is arranged on the window cavity wall; and the cross-coupling rod is insulated from the window cavity wall. Through arranging the two resonant cavities with the resonant columns, arranging the cross-coupling rod on the window cavity wall between the two resonant cavities, and enabling the two ends of the cross-coupling rod to respectively extend into the two resonant cavities, a transmission zero is formed, accordingly, the volume of the whole cross-coupling unit is reduced and the cross coupling that one transmission zero can be formed by using two cavities is achieved.
Description
[technical field]
The utility model relates to filter field, more particularly, relates to a kind of cross-couplings unit that has only two resonant cavitys in the filter.
[background technology]
Duplexer is an important devices of frequency-selecting in the radio-frequency (RF) communication system, and its function by useful signal, can also effectively suppress the influence of other noise signal to system with minimum Insertion Loss.Now communicate by letter now epoch of develop rapidly, also more and more higher to the requirement of communication system, also more and more higher to the duplexer volume requirement.How could utilize minimum volume, realize higher inhibition requirement, be a kind of trend of present duplexer development.
Generally include two-way filter in duplexer, the one tunnel is used for receiving, and one the tunnel is used for emission.In every path filter, comprise a plurality of cross-couplings unit, be used to suppress the passband of different frequency.In traditional cross-couplings unit, people adopt a plurality of resonant cavitys (minimum three) to construct a transmission zero usually, to reach the purpose of the outer passband of inhibition zone.But the structure of a plurality of resonant cavitys makes that the required volume in cross-couplings unit is bigger, makes the volume of whole duplexer also be not easy to dwindle.
[utility model content]
The technical problems to be solved in the utility model is, at least need three resonant cavitys just can construct a transmission zero at cross-couplings of the prior art unit, make the defective that the cross-couplings unit volume can't further be dwindled, a kind of cross-couplings unit is provided, have only two resonant cavitys, thereby can further dwindle the volume of whole cross-couplings unit.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of cross-couplings unit, comprise that first resonant cavity, second resonant cavity and sealing are arranged on the seal cover of described first and second resonant cavity open-mouth, are provided with window chamber wall between described first resonant cavity and second resonant cavity; Be provided with first resonance post and the output port in described first resonant cavity, be provided with second resonance post and the input port in described second resonant cavity; Described window chamber wall is provided with that an end is connected with described output port and the other end stretches to the cross-couplings bar in described second resonant cavity, described cross-couplings bar and described window chamber wall insulation setting.
In cross-couplings described in the utility model unit, be provided with collets between described window chamber wall and the described cross-couplings bar.
In cross-couplings described in the utility model unit, described window chamber wall is provided with breach, and described collets and described breach are complementary, and described collets center is provided with the through hole that matches with described cross-couplings bar.
In cross-couplings described in the utility model unit, described cover plate is provided with adjustable debugging screw, and described debugging screw extends in resonant cavity and inserts in the described resonance post.
Implement cross-couplings described in the utility model unit, has following beneficial effect: by the resonant cavity of two band resonance posts is set, and on the window chamber wall between two resonant cavitys, the cross-couplings bar is set, the two ends of this cross-couplings bar are stretched into respectively in two resonant cavitys, form transmission zero zero point, thereby dwindled the volume of whole cross-couplings unit.Can regulate the output power at zero point by the length that adjusting cross-couplings bar stretches in the resonant cavity, to satisfy different requirements.
The utility model is described in further detail below in conjunction with drawings and Examples.
[description of drawings]
Fig. 1 is the front view of cross-couplings described in the utility model unit preferred embodiment;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the B-B cutaway view of Fig. 1;
Fig. 4 a is the resolution charts of two resonant cavitys when not establishing the cross-couplings unit;
Fig. 4 b is the resolution chart of cross-couplings described in the utility model unit preferred embodiment.
[embodiment]
In cross-couplings described in the utility model unit, comprise that two resonant cavitys and sealing are arranged on the cover plate 1 of two resonant cavity open-mouths as shown in Figure 1, 2, 3.Wherein two resonant cavitys are respectively first resonant cavity 10 and second resonant cavity 20, are provided with window chamber wall 2 between two resonant cavitys 10,20; Be provided with in first resonant cavity 10 in the first resonance post 11 and output port 30, the second resonant cavitys 20 and be provided with the second resonance post 21 and input port 40.Be provided with cross-couplings bar 51 on window chamber wall 2, an end of this cross-couplings bar 51 is connected with output port 30 in first resonant cavity 10 and the other end stretches in second resonant cavity 20, cross-couplings bar 51 and the 2 insulation settings of window chamber wall.
In this preferred embodiment, adopt coupling output in first resonant cavity 10, particularly, can extend to cover plate 1 from the bottom of first resonant cavity 10 an output boss 31 is set, on boss 31, fixedly install one and pass the output connecting rod 32 that cover plate 1 extends to first resonant cavity, 10 outsides, this output connecting rod 32 is connected with aerial lug, forms output port; Cross-couplings bar 51 can be set to link together at boss 31 places with output port 30.Input port 40 can be arranged on the chamber wall of second resonant cavity 20, an input connecting rod 42 can be set on the chamber wall of second resonant cavity 20 particularly, these input connecting rod 42 1 ends are connected with the second resonance post 21 and the other end passes the chamber wall and extends to that resonant cavity 21 is outside to be connected with aerial lug, the formation input port.
In this preferred embodiment, between window chamber wall 2 and cross-couplings bar 51, be provided with collets 52, these collets 52 are fixed on the window chamber wall 2.Particularly, can on window chamber wall 2, breach 53 be set, collets 52 be set be complementary, make collets 52 just in time fill this breach 53 with breach 53.Offer through hole 54 in collets 52 centre positions, this through hole 54 matches with cross-couplings bar 51, and this makes 51 insulation of cross-couplings bar be arranged on the window chamber wall 2.And an end of cross-couplings bar 51 passes through hole 54 and extends in second resonant cavity 20, and the other end is connected with output port 30 in first resonant cavity 10.
In the resolution chart shown in Fig. 4 a, when between two resonant cavitys cross-couplings bar 51 not being set, the frequency and the output frequency of the outer passband of band are very approaching, and outer inhibition only is 5dB to this coupling unit to the 10MHz band, regional as shown in the figure A.In the resolution chart shown in Fig. 4 b, when aforesaid cross-couplings bar 51 is set in two resonant cavitys, outside band, produce one in the passband and exported zero point, make that outer inhibition expands 12dB to the 10MHz band in this cross-couplings unit, area B as shown in the figure, band is outer to be suppressed thereby improved, and has improved the antijamming capability of product.
In the above-described embodiments, also be provided with coupling debugging bar 60 on the cover plate 1 between first and second resonance post, this coupling debugging bar is used for regulating the passband of filter.
In the above-described embodiments, in order to obtain suitable output zero point, the resonance frequency scalable of first and second resonance post can be set.Particularly, first and second resonance post is the resonance post 12,22 that is arranged in resonant cavity, adjustable debugging screw 13,23 is set on cover plate 1, and debugging screw 13,23 passes cover plate 1 and extends in resonant cavity and be inserted in the resonance post 12,22, but does not contact with the resonance post.When regulating the degree of depth of debugging screw 13,23 in the resonance post, can change the distribution shape of resonance frequency response curve; Adjust the length of cross-couplings bar 51 again, at the output zero point that just adjustable integration is suitable, suppress effect outward to obtain best band.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (4)
1. a cross-couplings unit is characterized in that, comprises that first resonant cavity, second resonant cavity and sealing are arranged on the seal cover of described first and second resonant cavity open-mouth, are provided with window chamber wall between described first resonant cavity and second resonant cavity; Be provided with first resonance post and the output port in described first resonant cavity, be provided with second resonance post and the input port in described second resonant cavity; Described window chamber wall is provided with that an end is connected with described output port and the other end stretches to the cross-couplings bar in described second resonant cavity, described cross-couplings bar and described window chamber wall insulation setting.
2. according to the described cross-couplings of claim 1 unit, it is characterized in that, be provided with collets between described window chamber wall and the described cross-couplings bar.
3. according to the described cross-couplings of claim 2 unit, it is characterized in that described window chamber wall is provided with breach, described collets and described breach are complementary, and described collets center is provided with the through hole that matches with described cross-couplings bar.
4. according to each described cross-couplings unit in the claim 1 to 3, it is characterized in that described cover plate is provided with adjustable debugging screw, described debugging screw extends in resonant cavity and inserts in the described resonance post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205170881U CN201927688U (en) | 2010-09-02 | 2010-09-02 | Cross-coupling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205170881U CN201927688U (en) | 2010-09-02 | 2010-09-02 | Cross-coupling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201927688U true CN201927688U (en) | 2011-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205170881U Expired - Lifetime CN201927688U (en) | 2010-09-02 | 2010-09-02 | Cross-coupling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201927688U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3748765A4 (en) * | 2018-01-31 | 2021-11-03 | KMW Inc. | Radio frequency filter |
-
2010
- 2010-09-02 CN CN2010205170881U patent/CN201927688U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3748765A4 (en) * | 2018-01-31 | 2021-11-03 | KMW Inc. | Radio frequency filter |
| US11196137B2 (en) | 2018-01-31 | 2021-12-07 | Kmw Inc. | Radio frequency filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 5th floor, building 1, Guoren science and Technology Park, the intersection of Jinxiu middle road and Cuijing Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Guoren Technology Co., Ltd Address before: 518057. B building 1F, three national building, science and technology, Shizhong District, Nanshan District hi tech Zone, Guangdong, Shenzhen Patentee before: CHINA GRENTECH CORPORATION Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |