CN101227019A - Broadband duplexer - Google Patents
Broadband duplexer Download PDFInfo
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- CN101227019A CN101227019A CNA200810057850XA CN200810057850A CN101227019A CN 101227019 A CN101227019 A CN 101227019A CN A200810057850X A CNA200810057850X A CN A200810057850XA CN 200810057850 A CN200810057850 A CN 200810057850A CN 101227019 A CN101227019 A CN 101227019A
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- pass filter
- coupler
- duplexer
- low pass
- broadband
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Abstract
The invention relates to a bandwidth duplexer which is characterized in that the bandwidth duplexer comprises a straight-arm matching waveguide, a coupling, a side arm matching waveguide and a low-pass filter, wherein the straight-arm matching waveguide, the coupling and the low-pass filter are straight conduits, the side arm matching waveguide is a curved conduit, one end of the straight-arm matching waveguide is connected with a transmitter to form a transmitting port and the other end is connected with the coupling whose the other end is connected with a receiver via antenna feed to form a reception port, one end of the side arm matching waveguide is connected with the intermediate section outlet of the coupling and the other end is connected with the low-pass filter whose the other end is connected with the receiver via a low noise amplifier to form a reception port. The bandwidth duplexer is simple and compact in structure, little in volume, low in cost, convenient in molding and mass production and can be applied widely in various satellite communication systems.
Description
Technical field
The present invention relates to the duplexer that uses in a kind of satellite communication field, particularly about improving the broadband duplexer of receive-transmit isolation and transmitting-receiving port standing-wave ratio in a kind of Ku of being applicable to wave band bi-directional satellite communication systems.
Background technology
Ku wave band broadband duplexer often is used for bi-directional satellite communication systems as the matching component of reflector antenna at present, realizes the transmitting-receiving isolation of earth station system to satellite-signal.In bi-directional satellite communication systems, consider the power of saving signal transmitter and the factors such as quality that improve received signal, require the standing-wave ratio of duplexer transmitting-receiving port the smaller the better usually; In order to improve the signal to noise ratio of receive path, require receive-transmit isolation high more good more simultaneously.But in specific design and emulation, each module in the duplexer can make the standing-wave ratio performance index of port worsen when optimizing receive-transmit isolation again, low standing-wave ratio and high receive-transmit isolation are a pair of paradox, how to arrange in pairs or groups these two indexs optimum, be sixty-four dollar question in the duplexer design.
In order to arrange in pairs or groups standing-wave ratio and receive-transmit isolation index optimum, both at home and abroad common way is in design the limited field of index to be enlarged, and in duplexer, increase an adjusting device, treat that duplexer production is finished after, in the laboratory, standing-wave ratio and receive-transmit isolation index are carried out tuning.Because every duplexer all has an evolutionary process after production is finished, thereby has limited the large-scale production of duplexer.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of can avoiding and after machining, again product is regulated, thereby increase substantially the broadband duplexer of production efficiency.
For achieving the above object, the present invention takes following technical scheme: a kind of bandwidth duplexer, it is characterized in that it comprises the straight-arm matched waveguide, coupler, side arm matched waveguide and low pass filter, described straight-arm matched waveguide, coupler and low pass filter are a straight pipeline, described side arm matched waveguide is a curved pipe, described straight-arm matched waveguide one end is as the emission port that connects transmitter, the other end connects described coupler, the other end of described coupler is as the receiving port that connects receiver by antenna feed, described side arm matched waveguide one end connects the centre exit of described coupler, the other end connects described low pass filter, and the other end of described low pass filter is as the receiving port that connects receiver by low noise amplifier.
Be provided with a strip passage at described low pass filter middle part, in described strip passage, be arranged at intervals with some rectangular filter pieces, be respectively arranged with two stair-stepping fat pipes that add at the two ends of described strip passage, be respectively arranged with a rectangular filter piece in the fat pipe in described adding near described strip passage two ends.
The quantity of the filter block in the described strip passage is 8～10, and optimal number is 9.
Described strip passage and the rectangular filter tile height that adds in the fat pipe are: 4.5～5.0mm, width is: 1.6～2.0mm, length is: 3.0～12.0mm.
Described low pass filter comprises cavity and the seal cover two parts composition that links into an integrated entity by bolt.
Described side arm matched waveguide comprises cavity and the seal cover two parts composition that links into an integrated entity by bolt.
Be provided with a rectangle spacing block in the pipeline of described coupler, the height of described spacing block is: 12.5～13.5mm, width is: 1.5～2.2mm, length is: 18.0-25.0mm.
The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to be provided with straight-arm matched waveguide, coupler, side arm matched waveguide, low pass filter, therefore form the loop of a resonant window side arm coupling+ladder coupling, realized the normal use in 10.75～12.75GHz scope.2, the signal of transmit frequency band (is launched through feed after 13.75～14.0GHz) the distinctive cavity passage of forming by straight-arm matched waveguide and coupler, because the coupler of receive path and the high-isolation of Design of Filter, make and be coupled to behind the receive path signal of transmission channel rapidly decay reaches 85dB, guaranteed the normal reception of receive path signal.3, low pass filter of the present invention adopts stepped channel shape, and be provided with filter block, and therefore formed the waveguide filter of a band ridge, realized broadband, adjacent high-isolation frequently, guaranteeing that 13.75～14.50GHz isolation is up to more than the 70dB under 10.75～12.75GHz passband situation.4, the high-isolation of coupler of the present invention and low pass filter design, the present invention is received and dispatched can a shared cover antenna feed, makes satellite ground transmit-receive sharing system become possibility.5, the present invention is simple in structure, compact, and volume is little, and is with low cost, is convenient to very much mold, large-scale production.6, the present invention can realize tranmitting frequency 13.75～14.50GHz, receive frequency 10.95～12.75GHz; Emission voltage standing wave ratio≤1.1: 1, reception voltage standing wave ratio≤1.25: 1; Receive-transmit isolation≤85dB; Loss≤0.1dB is inserted in emission, receives to insert loss≤0.2dB; Power capacity 1KW; Radio frequency interface WR75, the present invention can be widely used in the various satellite communication systems.
Description of drawings
Fig. 1 is a diplexer structure schematic diagram of the present invention
Fig. 2 is the half section schematic diagram of Fig. 1
Fig. 3 is the A-A cross-sectional schematic of Fig. 2
Fig. 4 is the B-B cross-sectional schematic of Fig. 2
Fig. 5 is the schematic top plan view of Fig. 4
Fig. 6 is a side arm matched waveguide schematic side view of the present invention
Fig. 7 is the C-C cross-sectional schematic of Fig. 2
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, broadband duplexer of the present invention mainly is made up of straight-arm matched waveguide 1, coupler 2, side arm matched waveguide 3 and low pass filter 4 four parts.
As Fig. 1, Fig. 2, shown in Figure 3, straight-arm matched waveguide 1 is a rectangle straight pipeline, and an end of straight pipeline is provided with a rectangular flange 11 as the emission port that connects the transmitter (not shown), and the other end is a circular flange 12.The straight pipeline outlet upper and lower of circular flange 12 is respectively arranged with a wing lug 13.
As shown in Figure 1 and Figure 2, side arm matched waveguide 3 is 90 ° of curved pipes of a rectangle, and the corner in the curved pipe is set to the reflecting surface 31 of 45 ° of inclinations.The two ends of side arm matched waveguide 3 are provided with a flange 32,33 respectively, and flange 32 is connected with the flange 24 of coupler 2.The flange 33 of side arm matched waveguide 3 connects the flange 41 of low pass filter 4 one ends, and the flange 42 of low pass filter 4 other ends is as the receiving port that connects the receiver (not shown) by low noise amplifier.
As shown in Figure 6, side arm matched waveguide 3 is easy to make, can be processed into a cavity 34 and a seal cover 35 two-part combinations, cavity 34 two ends are respectively arranged with half flange, the two ends of seal cover 35 are provided with second half flange corresponding with cavity 34, and cavity 34 and seal cover 35 link into an integrated entity by some bolts.
As Fig. 1, Fig. 2, shown in Figure 7, low pass filter of the present invention 4 middle parts are a strip passage 43, are respectively arranged with two stair-stepping fat pipes 44,45 that add at the two ends of passage 43, are arranged at intervals with nine filter blocks 46 in strip passage 43.A filter block 47 also is being set near adding of strip passage 43 two ends on the fat pipe 44 respectively, is adding fat pipe 44 and filter block 47 has been formed ridge waveguide, having the effect of the frequency widened.Filter block 46 is formed a series of resonant cavity with strip passage 43, has realized the filter function to characteristic frequency.
In the foregoing description, the height of each filter block 46,47 can be consistent with width, such as highly being: 4.5～5.0mm, width is: 1.6～2.0mm, length can change to some extent, and its scope can be 3.0～12.0mm.
As Fig. 1, shown in Figure 7, low pass filter 4 is easy to make, also can be processed into a cavity 48 and a seal cover 49 two-part combinations, cavity 48 two ends are respectively arranged with half flange, the two ends of seal cover 49 are provided with second half flange corresponding with cavity 48, and cavity 48 and seal cover 49 link into an integrated entity by some bolts 50.Strip passage 43 is set in the cavity 48 and adds fat pipe 44,45.Each filter block 46,47 can be arranged in the strip passage 43 of cavity 48 1 sides, also can be arranged on the seal cover 49 with respect to strip passage 43.
In the various embodiments described above, straight-arm matched waveguide 1, coupler 2, side arm matched waveguide 3 and low pass filter 4 planforms can change to some extent, and particularly its profile is unrestricted, as long as guarantee the planform in the pipeline.
Broadband duplexer of the present invention is when work, and the signal of transmitter emission is launched signal by antenna feed through straight-arm matched waveguide 1 and coupler 2; Conversely, received signal also can receive after overcoupling device 2 enters side arm matched waveguide 3 from antenna feed, through after the polarization coupled, enter into low pass filter 4, again by low pass filter 4 filtering, and the low noise amplifier that is provided with through the receiving port place, receive by receiver.Because the receive-transmit isolation of this duplexer is better than 85dB, transmit and be coupled to the side arm matched waveguide, with minimum decay 85dB, so can not influence receiver reception to received signal when arriving receiver behind the filter.
Claims (10)
1. bandwidth duplexer, it is characterized in that: it comprises the straight-arm matched waveguide, coupler, side arm matched waveguide and low pass filter, described straight-arm matched waveguide, coupler and low pass filter are a straight pipeline, described side arm matched waveguide is a curved pipe, described straight-arm matched waveguide one end is as the emission port that connects transmitter, the other end connects described coupler, the other end of described coupler is as the receiving port that connects receiver by antenna feed, described side arm matched waveguide one end connects the centre exit of described coupler, the other end connects described low pass filter, and the other end of described low pass filter is as the receiving port that connects receiver by low noise amplifier.
2. a kind of broadband duplexer as claimed in claim 1, it is characterized in that: be provided with a strip passage at described low pass filter middle part, in described strip passage, be arranged at intervals with some rectangular filter pieces, be respectively arranged with two stair-stepping fat pipes that add at the two ends of described strip passage, be respectively arranged with a rectangular filter piece in the fat pipe in described adding near described strip passage two ends.
3. a kind of broadband duplexer as claimed in claim 2 is characterized in that: the quantity of the filter block in the described strip passage is 8～10.
4. a kind of broadband duplexer as claimed in claim 3 is characterized in that: the quantity of the filter block in the described strip passage is 9.
5. as claim 2 or 3 or 4 described a kind of broadband duplexers, it is characterized in that: described strip passage and the filter block height that adds in the fat pipe are: 4.5～5.0mm, width is: 1.6～2.0mm, length is: 3.0～12.0mm.
6. as claim 1 or 2 or 3 or 4 described a kind of broadband duplexers, it is characterized in that: described low pass filter comprises cavity and the seal cover two parts composition that links into an integrated entity by bolt.
7. a kind of broadband duplexer as claimed in claim 5 is characterized in that: described low pass filter comprises cavity and the seal cover two parts composition that links into an integrated entity by bolt.
8. as claim 1 or 2 or 3 or 4 or 7 described a kind of broadband duplexers, it is characterized in that: be provided with a rectangle spacing block in the pipeline of described coupler, the height of described spacing block is: 12.5～13.5mm, width is: 1.5～2.2mm, length is: 18.0-25.0mm.
9. a kind of broadband duplexer as claimed in claim 4 is characterized in that: be provided with a rectangle spacing block in the pipeline of described coupler, the height of described spacing block is: 12.5～13.5mm, width is: 1.5～2.2mm, length is: 18.0～25.0mm.
10. a kind of broadband duplexer as claimed in claim 6 is characterized in that: be provided with a rectangle spacing block in the pipeline of described coupler, the height of described spacing block is: 12.5～13.5mm, width is: 1.5～2.2mm, length is: 18.0～25.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810057850XA CN101227019A (en) | 2008-02-19 | 2008-02-19 | Broadband duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810057850XA CN101227019A (en) | 2008-02-19 | 2008-02-19 | Broadband duplexer |
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| CN101227019A true CN101227019A (en) | 2008-07-23 |
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| CNA200810057850XA Pending CN101227019A (en) | 2008-02-19 | 2008-02-19 | Broadband duplexer |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035055A (en) * | 2010-10-26 | 2011-04-27 | 宁波森富机电制造有限公司 | Diplexer |
| CN102299424A (en) * | 2011-05-31 | 2011-12-28 | 西安空间无线电技术研究所 | Dual-frequency dual-polarized feed assembly in C frequency band |
| CN102299425A (en) * | 2011-06-14 | 2011-12-28 | 西安空间无线电技术研究所 | High-power low-PIM (passive intermodulation) broadband polarized frequency duplexing feed assembly in Ku frequency band |
| CN102794614A (en) * | 2012-08-30 | 2012-11-28 | 西安空间无线电技术研究所 | Bending type forming method of corner cut waveguide bend |
| CN103545583A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Waveguide low-pass filter |
| CN103715485A (en) * | 2013-12-09 | 2014-04-09 | 成都九洲迪飞科技有限责任公司 | High-frequency harmonic suppression waveguide filter |
| CN105633524A (en) * | 2016-03-14 | 2016-06-01 | 成都天奥电子股份有限公司 | Ridge waveguide structure capable of improving passive intermodulation in ridge waveguide connection |
| CN106450635A (en) * | 2016-12-08 | 2017-02-22 | 江苏贝孚德通讯科技股份有限公司 | Integrated microwave wave guide coupler |
| CN107275727A (en) * | 2017-06-28 | 2017-10-20 | 北京理工大学 | A kind of 340GHz is based on film-type device quasi-optical broadband duplexer |
| CN107302123A (en) * | 2017-06-28 | 2017-10-27 | 北京理工大学 | A kind of 340GHz is based on film-type device broadband duplexer |
| CN111029690A (en) * | 2019-12-05 | 2020-04-17 | 中国联合网络通信集团有限公司 | Filter |
-
2008
- 2008-02-19 CN CNA200810057850XA patent/CN101227019A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035055A (en) * | 2010-10-26 | 2011-04-27 | 宁波森富机电制造有限公司 | Diplexer |
| CN102299424A (en) * | 2011-05-31 | 2011-12-28 | 西安空间无线电技术研究所 | Dual-frequency dual-polarized feed assembly in C frequency band |
| CN102299424B (en) * | 2011-05-31 | 2013-10-16 | 西安空间无线电技术研究所 | Dual-frequency dual-polarized feed assembly in C frequency band |
| CN102299425B (en) * | 2011-06-14 | 2014-01-15 | 西安空间无线电技术研究所 | High-power low-PIM (passive intermodulation) broadband polarized frequency duplexing feed assembly in Ku frequency band |
| CN102299425A (en) * | 2011-06-14 | 2011-12-28 | 西安空间无线电技术研究所 | High-power low-PIM (passive intermodulation) broadband polarized frequency duplexing feed assembly in Ku frequency band |
| CN102794614B (en) * | 2012-08-30 | 2015-02-11 | 西安空间无线电技术研究所 | Bending type forming method of corner cut waveguide bend |
| CN102794614A (en) * | 2012-08-30 | 2012-11-28 | 西安空间无线电技术研究所 | Bending type forming method of corner cut waveguide bend |
| CN103545583A (en) * | 2013-10-24 | 2014-01-29 | 江苏贝孚德通讯科技股份有限公司 | Waveguide low-pass filter |
| CN103715485A (en) * | 2013-12-09 | 2014-04-09 | 成都九洲迪飞科技有限责任公司 | High-frequency harmonic suppression waveguide filter |
| CN105633524A (en) * | 2016-03-14 | 2016-06-01 | 成都天奥电子股份有限公司 | Ridge waveguide structure capable of improving passive intermodulation in ridge waveguide connection |
| CN106450635A (en) * | 2016-12-08 | 2017-02-22 | 江苏贝孚德通讯科技股份有限公司 | Integrated microwave wave guide coupler |
| CN106450635B (en) * | 2016-12-08 | 2021-10-01 | 江苏贝孚德通讯科技股份有限公司 | Integrated microwave waveguide coupler |
| CN107275727A (en) * | 2017-06-28 | 2017-10-20 | 北京理工大学 | A kind of 340GHz is based on film-type device quasi-optical broadband duplexer |
| CN107302123A (en) * | 2017-06-28 | 2017-10-27 | 北京理工大学 | A kind of 340GHz is based on film-type device broadband duplexer |
| CN107302123B (en) * | 2017-06-28 | 2019-10-22 | 北京理工大学 | A kind of 340GHz is based on film-type device broadband duplexer |
| CN107275727B (en) * | 2017-06-28 | 2019-10-22 | 北京理工大学 | A kind of 340GHz is based on film-type device quasi-optical broadband duplexer |
| CN111029690A (en) * | 2019-12-05 | 2020-04-17 | 中国联合网络通信集团有限公司 | Filter |
| CN111029690B (en) * | 2019-12-05 | 2021-09-14 | 中国联合网络通信集团有限公司 | Filter |
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Open date: 20080723 |