CN203521566U - A dual-frequency high intermodulation waterproof combiner - Google Patents
A dual-frequency high intermodulation waterproof combiner Download PDFInfo
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- CN203521566U CN203521566U CN201320586181.1U CN201320586181U CN203521566U CN 203521566 U CN203521566 U CN 203521566U CN 201320586181 U CN201320586181 U CN 201320586181U CN 203521566 U CN203521566 U CN 203521566U
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Abstract
The utility model discloses a dual-frequency high intermodulation waterproof combiner which adopts a resonant cavity bandpass filter form and enables cavity filters respectively applicable to DCS and TD (F/A) network signals to be designed in the same cavity by using the basic principles of a filter. The dual-frequency high intermodulation waterproof combiner uses tap disk space coupling connection to enable a third-order intermodulation index to reach from -145dBc to -153dBc. A waterproof structure is also adopted and the inner wall of the cavity is thicker and higher than the original one. A 2x2mm groove is disposed at the periphery of the front edge of the cavity, and a rubber ring is stuffed in the groove. The cavity is additionally provided with a sealed cover with screws only on the periphery for compressing the rubber band tightly and the sealed cover plays the waterproof role. The above techniques are used for enabling an interval of only 30MHz between a DCS system with a TD (FA) system and achieving isolation of 80dB. The dual-frequency high intermodulation waterproof combiner is high in technical indicator out-of-band rejection, good in intermodulation index, small in insertion loss, good in waterproofness, and easy in installation and commissioning of outdoor base stations, and a highly practical communication network optimization device.
Description
Technical field
The utility model is the network optimization product belonging in electronic information and mobile communication technology field, specifically the high intermodulation waterproof of a kind of DCS/TD (F/A) double frequency mixer.
Background technology
DCS is entirely by name: DigitalCellularSystemat1800MHz, Chinese implication is 1800MHz Digital Cellular System, China's Mobile Communication Development is extremely swift and violent, on the one hand due to the restriction of 900MHz frequency resource, there is the phenomenons such as frequency resource is nervous, channel is not enough, and traffic density is excessive in some areas; Utilize on the other hand the technology such as multiple frequency multiplex mode, multilayer covering, frequency hopping to carry out increase capacity, also have many limitations.Only have and by DCS1800 net, carry out traffic and share, could thoroughly address the above problem.
TD-SCDMA is entirely by name: Time Division-Synchronous Code Division Multiple Access (CDMA (Code Division Multiple Access) that the time-division is synchronous), the 3G (Third Generation) Moblie standard proposing as China, since 1999 formally submit to ITU (International Telecommunication Association), gone through the time about ten years, completed expert group's assessment of standard, ITU approves and issues, fusion with 3GPP (third generation partnership projects) system, the a series of International standardization work such as introducing of new technology characteristic, thereby make TD-SCDMA standard become that first proposes by China, take Intellectual Property Right in China as master's, the radio communication international standard of being accepted extensively in the world and approving.
The TD-SCDMA of China Mobile system can frequency of utilization resource be 85MHz at present, and available TDF & TDA & TDE represents specific as follows:
TD (A) frequency range (2010～2025 MHz, former B frequency range): amount to 15MHz, can cover for nationwide indoor and outdoor.TDA frequency range is the frequency range that TD-SCDMA system is used the earliest, and industry degree of support is best, and this frequency range is the primary frequency range of TD-SCDMA.Outdoor cover is preferentially used 2015-2025MHz frequency range, and indoor priority covering is used 2010-2015MHz frequency range.
TD (F) frequency range (1880～1900MHz, former A frequency range): amount to 20MHz, can cover for nationwide indoor and outdoor.TDF frequency range nature of radio propagation is relatively better, considers the interference of Personal Handyphone System (PHS) system, should from low-frequency range with.
TD (E) frequency range (2320～2370 MHz, former C frequency range): amount to 50MHz, can be for nationwide indoor covering.
TDE frequency range is planned to the extended frequency band of the indoor covering of TD, is only allowed for indoorly, considers the interference with WLAN, should from low-frequency range with.
Intermodulation Interference, refers to when two or more interference signals are added to receiver simultaneously, and due to nonlinear effect, the combination frequency of these two interference just equals sometimes or approaches useful signal frequency and smoothly by receiver, wherein third order intermodulation is the most serious.Utilize the networking of different frequency resource, have the problem that Intermodulation Interference is serious.
Utility model content
The utility model utilizes the networking of different frequency resource for solving, the problem that Intermodulation Interference is serious, and realize water-proof function, provide a kind of by the filter of DCS and two frequency network signals of TD (F/A), the dual-frequency channel merger of design in same cavity is that multi-channel network signal system is transmitted indispensable device.
DCS/TD described in the utility model (F/A) dual-frequency channel merger, comprises the cover plate on cavity and cavity, and inside cavity is provided with two filters, is respectively DCS filter and TD (F/A) filter; Cavity outer setting has three joints, is respectively DCS port, TD (F/A) port and public port.Wherein DCS port, TD (F/A) port are connected with TD (F/A) filter input end with DCS filter input end respectively, public port is connected with TD (F/A) filter output jointly with DCS filter output, and two filters partition wall in this junction has groove and realizes coupling.
Described DCS filter comprises 8 connected resonant cavitys successively, i.e. the first resonant cavity to the eight resonant cavitys, and the first common cavity.A resonant rod has been installed in the center of each resonant cavity, and the resonant rod in the first resonant cavity is of coupled connections by tap dish and DCS port space; Resonant rod in the 8th resonant cavity is connected with the first common cavity interior resonance bar by Space Coupling, and the first common cavity interior resonance bar is connected with public port Space Coupling by tap dish again.And between the second resonant cavity and the 4th resonant cavity, between the 5th resonant cavity and the 7th resonant cavity, perceptual cross coupling device is installed.Described perceptual cross coupling device is two installations tuning cross-lines on the cover board.
Described TD (F/A) filter comprises 7 connected resonant cavitys successively, i.e. the 9th resonant cavity to the 15 resonant cavitys, and the first common cavity.A resonant rod has been installed in the center of each resonant cavity, and the resonant rod in the 9th resonant cavity is of coupled connections by tap dish and TD (F/A) port space; Resonant rod in the 15 resonant cavity is connected with the first common cavity interior resonance bar by Space Coupling, and the first common cavity interior resonance bar is connected with public port Space Coupling by tap dish again; And there is capacitive cross coupling device between the 11 resonant cavity and the 13 resonant cavity.Described capacitive cross coupling device is one and is fixed on the tuning bar that flies in the recessed grain of cavity.
All resonant rods and joint joint, all adopt tap disk space to be of coupled connections, without coupled-wires and scolding tin.Make third order intermodulation index from-reach-153dBc of 145dBc.Reduce the harm to transmitter, improved effective power, reduced interference space electric wave order.
As the further improvement of technique scheme, the utility model adopts waterproof construction, and cavity front edge has recessed grain in one week, fills in rubber ring.This cavity is furnished with two cover plates, and a cover plate is original cover plate, is covered with tuning screw and screw above; Another piece is seal cover board, only at surrounding cloth screwing, is used for tightly suppressing rubber ring, plays waterproof action.And employing water joint, during installation, because cavity inner wall is thickeied, mounting screw can only go deep in aluminium, and wear, thoroughly in mixer internal structure, does not go.
Described groove size is 2*2mm.
Whole cavity processes with aluminum and to inner electroplate.
Technical indicator of the present utility model is:
The utility model uses filter basic principle that the cavity body filter that is applicable to respectively DCS and TD (F/A) network signal is designed on same cavity.Adopt above technology to make it at DCS system and TD(FA) the system 30MHz of being only separated by, has accomplished the isolation of 80dB.And technical indicator Out-of-band rejection is high, intermodulation index is good, and Insertion Loss is little, good waterproof performance, be convenient to outdoor base station Installation and Debugging, is the communication network optimized device that practicality is very strong.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of the utility model cavity;
Fig. 2 is the left cutaway view of Fig. 1;
Fig. 3 is the external structure schematic diagram of the utility model cavity.
Embodiment
The utility model adopts lumped parameter and distributed constant principle, according to technical indicator, in conjunction with Chebyshev's type Design of Bandpass principle, DCS/TD described in the utility model (F/A) dual-frequency channel merger is described.See Fig. 1-2.The utility model comprises cavity 1(1), cover plate 2(1), cover plate 3(1) resonant rod 19(16), tuning screw 28(33), cover plate 2 screws (91) are installed, cover plate 3 screws (28), joint (3), the tuning bar 8 (1) that flies are installed.
The inwall of cavity 1 is thickeied 7mm on original thickness again, and its height adds 7mm on original height again, and cavity (1) front edge has the recessed poor 9 of 2*2mm for one week, fills in rubber ring; On recessed poor 9, be stamped cover plate 2, above it, be covered with tuning screw 28 and screw, another piece seal cover board (3) is set in cover plate 2 outsides again, only at surrounding cloth screwing; Joint is water joint.
DCS filter comprises 8 connected resonant cavitys 11～18 successively, and the first resonant cavity 11 is to the 8th resonant cavity 18, and the first common cavity 20.The resonant rod 19 that has installed in a resonant rod 19, the first resonant cavitys 11 center of each resonant cavity is connected with DCS port 4 Space Couplings by tap dish 7; Resonant rod 19 in the 8th resonant cavity 18 is connected with the first common cavity 20 interior resonance bars 19 by Space Coupling, and the first common cavity 20 interior resonance bars 19 are connected with public port 6 Space Couplings by tap dish 7 again.And between the second resonant cavity 12 and the 4th resonant cavity 14, between the 5th resonant cavity 15 and the 7th resonant cavity 17, perceptual cross coupling device 10 is installed.Perception cross coupling device 10 is two installations tuning cross-lines on the cover board.
TD (F/A) filter comprises 7 connected resonant cavitys 21～27 successively, i.e. the 9th resonant cavity 21 to the 15 resonant cavitys 27, and the first common cavity 20.The resonant rod 19 that has installed in a resonant rod 19, the nine resonant cavitys 21 center of each resonant cavity is connected with TD (F/A) port 5 Space Couplings by tap dish 7; Resonant rod 19 in the 15 resonant cavity 7 is connected with the first common cavity 20 interior resonance bars 19 by Space Coupling, and the first common cavity 20 interior resonance bars 19 are connected with public port 6 Space Couplings by tap dish 7 again.And there is capacitive cross coupling device 8 between the 11 resonant cavity 23 and the 13 resonant cavity 25.Capacitive cross coupling device 8 is one and is fixed on the tuning bar that flies in the recessed grain of cavity.
All resonant rods and joint joint, all adopt tap dish 6 Space Couplings to connect, without coupled-wires and scolding tin.Make third order intermodulation index from-145dBc, reach-153dBc.Reduce the harm to transmitter, improved effective power, reduced interference space electric wave order.
The concrete application approach of the present invention is a lot, and the above is only the preferred embodiment of the present invention, should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (7)
1. the high intermodulation waterproof of a double frequency mixer, comprises the cover plate (2) on cavity (1) and cavity (1), it is characterized in that: cavity (1) inside is provided with two filters, is respectively DCS filter and TD (F/A) filter; Cavity (1) outer setting has three joints, is respectively DCS port (4), TD (F/A) port (5) and public port (6); Wherein DCS port (4), TD (F/A) port (5) are connected with TD (F/A) filter input end with DCS filter input end respectively, public port (6) is connected with TD (F/A) filter output jointly with DCS filter output, and two filters partition wall in this junction has groove and realizes coupling.
2. the high intermodulation waterproof of double frequency according to claim 1 mixer, it is characterized in that: described DCS filter comprises 8 connected resonant cavitys (11～18) successively, the first resonant cavity (11) is to the 8th resonant cavity (18), and the first common cavity (20); A resonant rod (19) has been installed in the center of each resonant cavity, and the resonant rod (19) in the first resonant cavity (11) is connected with DCS port (4) Space Coupling by tap dish (7); Resonant rod (19) in the 8th resonant cavity (18) is connected with the resonant rod (19) in the first common cavity (20) by Space Coupling, and the resonant rod (19) in the first common cavity (20) is connected with public port (6) Space Coupling by tap dish (7) again; And between the second resonant cavity (12) and the 4th resonant cavity (14), between the 5th resonant cavity (15) and the 7th resonant cavity (17), perceptual cross coupling device (10) is installed.
3. the high intermodulation waterproof of double frequency according to claim 2 mixer, is characterized in that: described perceptual cross coupling device (10) is two installations tuning cross-lines on the cover board.
4. the high intermodulation waterproof of double frequency according to claim 1 mixer, it is characterized in that: described TD (F/A) filter comprises 7 connected resonant cavitys (21～27) successively, the 9th resonant cavity (21) is to the 15 resonant cavity (27), and the first common cavity (20); A resonant rod (19) has been installed in the center of each resonant cavity, and the resonant rod (19) in the 9th resonant cavity (21) is connected with TD (F/A) port (5) Space Coupling by tap dish (7); Resonant rod (19) in the 15 resonant cavity (27) is connected with the first common cavity (20) interior resonance bar (19) by Space Coupling, and the first common cavity (20) interior resonance bar (19) is connected with public port (6) Space Coupling by tap dish (7) again; And there is capacitive cross coupling device (8) between the 11 resonant cavity (23) and the 13 resonant cavity (25).
5. the high intermodulation waterproof of double frequency according to claim 4 mixer, is characterized in that: described capacitive cross coupling device (8) is one and is fixed on the tuning bar that flies in the recessed grain of cavity.
6. according to the high intermodulation waterproof of the double frequency mixer described in arbitrary claim in claim 1 to 5, it is characterized in that: described cavity (1) front edge has recessed grain (9) for one week, fills in rubber ring; Described cover plate (2) is covered with tuning screw (28) and screw above, in cover plate (2) outside, another piece seal cover board (3) is set again, only at surrounding cloth screwing; Described joint is water joint.
7. the high intermodulation waterproof of double frequency according to claim 6 mixer, is characterized in that: described cavity (1) processes with aluminum and to inner electroplate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320586181.1U CN203521566U (en) | 2013-09-23 | 2013-09-23 | A dual-frequency high intermodulation waterproof combiner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320586181.1U CN203521566U (en) | 2013-09-23 | 2013-09-23 | A dual-frequency high intermodulation waterproof combiner |
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| Publication Number | Publication Date |
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| CN203521566U true CN203521566U (en) | 2014-04-02 |
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| CN201320586181.1U Expired - Lifetime CN203521566U (en) | 2013-09-23 | 2013-09-23 | A dual-frequency high intermodulation waterproof combiner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319444A (en) * | 2014-10-31 | 2015-01-28 | 湖北三江航天险峰电子信息有限公司 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
| CN106058402A (en) * | 2016-08-05 | 2016-10-26 | 京信通信技术(广州)有限公司 | Double layer cavity combiner and a common port coupling device thereof |
| CN106785278A (en) * | 2017-01-16 | 2017-05-31 | 东莞市易讯时代通信有限公司 | The topological structure of size and third order intermodulation is reduced in a kind of combiner |
| CN111010888A (en) * | 2018-08-08 | 2020-04-14 | 深圳市大富科技股份有限公司 | Resonator and cavity filter |
| CN115498382A (en) * | 2022-09-27 | 2022-12-20 | 武汉凡谷电子技术股份有限公司 | Filter |
-
2013
- 2013-09-23 CN CN201320586181.1U patent/CN203521566U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319444A (en) * | 2014-10-31 | 2015-01-28 | 湖北三江航天险峰电子信息有限公司 | Double-frequency cavity filter compatible to working frequencies of GPS and Beidou |
| CN106058402A (en) * | 2016-08-05 | 2016-10-26 | 京信通信技术(广州)有限公司 | Double layer cavity combiner and a common port coupling device thereof |
| CN106058402B (en) * | 2016-08-05 | 2019-06-11 | 京信通信技术(广州)有限公司 | The double-deck chamber combiner and its common port coupling device |
| CN106785278A (en) * | 2017-01-16 | 2017-05-31 | 东莞市易讯时代通信有限公司 | The topological structure of size and third order intermodulation is reduced in a kind of combiner |
| CN111010888A (en) * | 2018-08-08 | 2020-04-14 | 深圳市大富科技股份有限公司 | Resonator and cavity filter |
| CN111010888B (en) * | 2018-08-08 | 2022-08-12 | 大富科技(安徽)股份有限公司 | Resonator and cavity filter |
| CN115498382A (en) * | 2022-09-27 | 2022-12-20 | 武汉凡谷电子技术股份有限公司 | Filter |
| CN115498382B (en) * | 2022-09-27 | 2023-07-14 | 武汉凡谷电子技术股份有限公司 | Filter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |