CN201118869Y - Double duplexers for base station - Google Patents

Abstract

The utility model relates to two diplexers for base station. The two diplexers are symmetrically composed of two diplexers with same structure. Each diplexer comprises a main body formed by a parallel rectangular cavity, a cover board, a resonant cavity inner conductor, a resonant frequency adjusting screw, an intercavernous coupling strength adjusting screw, and an input-output interface, a low pass filter resonant cavity which is arranged at the transceiving end and is paralleled to the parallel rectangular cavity is arranged in the abutting end of the main body of the diplexers, the low pass filter resonant cavity which is arranged at the transceiving end and is vertical to the parallel rectangular cavity is arranged at one side of the resonant cavity at the tail end of the diplexer, a low pass inner conductor is arranged in the low pass filter resonant cavity; one end of the low pass inner conductor is connected with the resonant cavity inner conductor at the transceiving end, and another end of the low pass inner conductor is connected with the input-output interface at the transceiving end. The diplexer has the advantages that the structure is simple, compact and crafty; the volume is small; and both the two diplexers are provided with the low pass filters, and the disturbance and the scattered radiation outside the working frequency can be restrained well, the performance of the diplexer is superior, the reliability is high, the purpose is broad, the series multi-cavity diplexer can be designed, and an ideal core double diplexer element is provided for wireless communication engineering.

Description

The base station is multiplexer in pairs

Technical field

The utility model relates to a kind of base station multiplexer in pairs, is applicable to the base station equipment of radio communication field radio signal transmission.

Background technology

In all kinds of Wireless Telecom Equipments of modern times, for example GSM/CDMA/PCS/DCS mobile communication high-power wireless base station, Digital Clustering high-power wireless base station etc. all need a kind of can by high-power, have high selectivity energy, loss as far as possible little, have that clutter suppresses, the duplexer technology of amphiorentation coupling, and based on the various critical components of this art designs.But, with regard to present technical merit, can pass through powerful multiplexer in pairs for one, at first, just there are many technological difficulties in the filter of drain performance that wants to obtain simultaneously and high selection performance, because a pair of more formidable contradiction on low-loss and the high selectivity.Existing TEM film multicavity filter has two kinds of versions commonly used: the multicavity filter of distributed couplings and the adjustable multicavity filter of centralized coupling.The former generally in the main body that conventional cast processes the broach shape insert a plurality of inner wires, be formed centrally a plurality of rectangular cavities in inner wire being, screw in the resonance frequency adjustment screw relative from the cavity opposite side with inner wire, the filter two ends have end plate, and input and output connector joins with filter two ends cavity respectively.This Filter Design is ripe with manufacturing, it is also less to insert loss, the problem that exists is the Fixed Design that is coupled as between the adjacent resonators, passband width is non-adjustable, be unfavorable for the design and the manufacturing of many kinds series of products, and when passband width required constriction, the distributed couplings district extended thereupon, increased the volume of filter.The latter mostly is that rotary-cut processes a plurality of cylindrical cavities (or rectangular cavity) in the bulk metal piece, also has inner wire and resonance frequency adjustment screw, has intercommunicating pore between the adjacent resonators, in connection place, regulates the coupling amount between the resonant cavity by the extrapolation screw rod.The major advantage of this filter is that after product was made, performances such as ripple, input and output standing-wave ratio fully be adjusted to and reach satisfactory result in can and being with passband width.The problem that exists is that screw device is relatively more clumsy, and the insertion loss is also bigger, and under the more situation of resonant cavity requirement, difficulty of processing increases, and technological debugging work is quite loaded down with trivial details, complicated, time-consuming.Since the last century the nineties, in land mobile communication system and digital clustering communication system, generally adopt the adjustable multicavity filter of a kind of centralized coupling (Motorola Inc., Ericsson, Korea S KMW Inc. all adopt this filter product), in the main body of bulk metal piece, process a plurality of rectangles or cylindrical coaxial cavity that honeycomb fashion is arranged, cylindrical inner conductor is installed in the chamber, must from body portion from upper cover plate screw in the resonance frequency adjustment screw corresponding with inner wire, increased the difficulty of Installation and Debugging.The filter of this structure mainly relies on the cross section that enlarges coaxial cavity, improve the precision of machining and plating measures such as (for example electroplates) is carried out on the surface reduced its loss, improve its optionally approach mainly be reasonable arrangement between the chamber, and increase the separate space coupled structure and realize the separate space coupling.Its shortcoming mainly is a high material consumption, and the processing technology complexity requires height, and difficulty is big, and production efficiency is low, and the production cost height is difficult to produce in enormous quantities, can not adapt to the requirement of communication technology fast development.Secondly, low-pass filtering is not with in common transmitting-receiving multiplexer in pairs, to the interference outside the working frequency range with spuiously penetrate radiation and can't suppress; Moreover common transmitting-receiving multiplexer in pairs can't be received and dispatched transmission signals to antenna end and detect not with the amphiorentation coupling circuit of sampled functions.

Summary of the invention

Problem to be solved in the utility model is, the duplexer that overcomes aforementioned body and be parallel rectangle cavity structure is difficult to take into account low drain performance and high selection performance, and a kind of novel structure and can be by powerful low loss high selectivity multi-cavity base station multiplexer in pairs is provided.

The technical scheme that its technical problem that solves the utility model adopts is as follows: the base station is multiplexer in pairs, it is made up of two identical duplexer symmetries of structure, described duplexer comprises the main body of being made up of parallel rectangular cavity, cover plate, the resonant cavity inner wire, the resonance frequency adjustment screw, stiffness of coupling adjustment screw between the chamber, input/output interface, it is characterized in that: have the sending and receiving end low-pass filtering resonant cavity that parallels with parallel rectangular cavity in the abutting end of two duplexer main bodys, have the sending and receiving end low-pass filtering resonant cavity vertical on the cover plate of duplexer tail end resonant cavity one side with parallel rectangular cavity, described low-pass filtering resonant cavity is built-in with the low pass inner wire, low pass inner wire one end connects the resonant cavity inner wire of sending and receiving end, and the other end connects the input/output interface of sending and receiving end.

The further feature of the utility model is: also have the transmission channel chamber that parallels with parallel rectangular cavity in the main body of two of multiplexer duplexers in pairs, has main transmission inner wire in the chamber, be equipped with the two piece sampling cables parallel directly over this master's transmission inner wire successively with main transmission inner wire, described sampling cable one end connects the coupling absorbing load, the other end connects the input output interface, the main body upper surface has amphiorentation coupling circuit plate embedded groove, and this trench bottom has the receiving and transmitting signal sampling delivery outlet that is communicated with the transmission channel chamber.

The beneficial effects of the utility model are as follows: multiplexer is simple in structure, compact, ingenious in pairs for this, and volume is little, and its two duplexers all are with low-pass filtering, can be good at suppressing interference and stray radiation outside the working frequency range; Band sample circuit and amphiorentation coupling circuit can be received and dispatched transmission signals coupling sampling to antenna end and detect, and in time report to the police when the antenna end standing-wave ratio worsens, with the maintain communications quality of signals; The structure that parallel rectangular cavity parallels in low-pass filtering resonant cavity and transmission channel chamber and the main body, the duplexer main body can be produced in enormous quantities by ripe aluminum extrusion process, and processing technology is simple, and the multiplexer in pairs of same type only need be opened a kind of mould, number of molds is few, thoroughly change the processing technology of traditional centralized coupling duplexer, and product repetition high conformity, do not need coating surface, save raw material, the production efficiency height, production cost is low, adapts to the requirement of communication technology fast development; The utility model is the multiplexer superior performance in pairs; production cost can reduce by 80%; of many uses; be easy to realize the large-scale production of many kinds; can design serial multi-cavity duplexer; with it is the transmitting-receiving multiplexer etc. in pairs that mobile communication, microwave radio relay communication, digital cluster communication and wireless access base station can be designed in the basis, for wireless communication engineering provides a kind of desirable core duplexer device.

Description of drawings

Fig. 1 is the utility model base station multiplexer master TV structure figure in pairs.

Fig. 2 for the utility model base station in pairs multiplexer remove face upwarding assumption diagram behind the lower cover.

Fig. 3 for the utility model base station in pairs the multiplexer master look cutaway view.

Number in the figure is schematically as follows: 1-duplexer, 2-duplexer, 11-main body, the 12-cover plate, 13-resonant cavity inner wire, 14-input/output interface, the 15-input/output interface, 16-resonance frequency adjustment screw, 18-open circuit separate space coupling device, stiffness of coupling adjustment screw between the 19-chamber, 21-low-pass filtering resonant cavity, 22-low-pass filtering resonant cavity, 23-low-pass filtering resonant cavity, 211-low pass inner wire, 221-low pass inner wire, the resonant cavity inner wire of 131-sending and receiving end, the resonant cavity inner wire of 132-sending and receiving end, 3-tail end resonant cavity, 331-cable link slot, 4-transmission channel chamber, 41-master is transmitted inner wire, the 42-cable of taking a sample, 44-input output interface, 45-input output interface, 5-amphiorentation coupling circuit plate embedded groove, 51-receiving and transmitting signal sampling delivery outlet, 7-antenna opening.

Embodiment

With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in further detail.But the utility model is not limited to given example.

As Fig. 1, Fig. 2, shown in Figure 3, the utility model base station is multiplexer in pairs, it is by two duplexers 1 that structure is identical, 2 symmetries are formed, duplexer 1 with left side in the front view is an example, this duplexer 1 comprises the main body of being made up of parallel rectangular cavity 11, cover plate 12, resonant cavity inner wire 13, resonance frequency adjustment screw 16, stiffness of coupling adjustment screw 19 between the chamber, input/ output interface 14,15, has the sending and receiving end low-pass filtering resonant cavity 21 that parallels with parallel rectangular cavity in the abutting end of two duplexer main bodys, 23, have the sending and receiving end low-pass filtering resonant cavity 22 vertical on the cover plate 17 of duplexer 1 tail end resonant cavity 3 one sides with parallel rectangular cavity, 24, continuation is an example with duplexer 1, its low-pass filtering resonant cavity 21, be equipped with low pass inner wire 211 in 22 respectively, 221, low pass inner wire 211,221 1 ends connect the resonant cavity inner wire 132 of sending and receiving end, 131, the other end connects the input/output interface 14 of sending and receiving end, 15.Among Fig. 1,7 is antenna opening, and 18 are open circuit separate space coupling device.The structure of duplexer 2 is identical with the structure of duplexer 1, and symmetric arrangement.

Be example still with duplexer 1, as Fig. 2, shown in 3, in the present embodiment, also has the transmission channel chamber 4 that parallels with parallel rectangular cavity in the main body of duplexer 1, has main transmission inner wire 41 in the chamber, be equipped with the two piece sampling cables parallel directly over this master's transmission inner wire 41 successively with main transmission inner wire, wherein one label is 42, one end of this sampling cable 42 connects coupling absorbing load (not drawing among the figure), the other end connects input output interface 44, do not draw in another root sampling cable map, it is that 42 sampling cable connected mode is consistent with label, and its end connects the coupling absorbing load, and the other end connects input output interface 45, main body 11 upper surfaces have amphiorentation coupling circuit plate embedded groove 5, and this trench bottom has the receiving and transmitting signal sampling delivery outlet 51 that is communicated with transmission channel chamber 4.

In the present embodiment, the transmission channel chamber 4 of duplexer 1 is positioned at the centre of duplexer 1 main body 11, and amphiorentation coupling circuit plate embedded groove 5 is positioned in the middle of the upper surface of duplexer main body 11; Has cover plate (not drawing among the figure) on the amphiorentation coupling circuit plate embedded groove 5 in duplexer 1 main body 11.

Identical and the symmetric arrangement of structure of duplexer 1,2, in the present embodiment only the structure to duplexer 1 be described in detail, the structure of duplexer 2 can be with reference to originally being example.

Among the embodiment as shown in Figure 2, the transmitting-receiving low-pass filtering resonant cavity 22,23 of duplexer 1,2 adjacents is arranged up and down; As shown in Figure 1, duplexer 1,2 is an integral structure, and by the method one-shot forming of section bar extrusion process, duplexer 1,2 also can be the branch body structure certainly, and realizes that by trip bolt both is fixing.

Claims (6)

1, the base station is multiplexer in pairs, it is made up of two identical duplexer symmetries of structure, described duplexer comprises the main body of being made up of parallel rectangular cavity, cover plate, the resonant cavity inner wire, the resonance frequency adjustment screw, stiffness of coupling adjustment screw between the chamber, input/output interface, it is characterized in that: have the sending and receiving end low-pass filtering resonant cavity that parallels with parallel rectangular cavity in the abutting end of two duplexer main bodys, have the sending and receiving end low-pass filtering resonant cavity vertical on the cover plate of duplexer tail end resonant cavity one side with parallel rectangular cavity, described low-pass filtering resonant cavity is built-in with the low pass inner wire, low pass inner wire one end connects the resonant cavity inner wire of sending and receiving end, and the other end connects the input/output interface of sending and receiving end.

2, base station according to claim 1 multiplexer in pairs, it is characterized in that also having the transmission channel chamber that parallels with parallel rectangular cavity in the main body of described duplexer, has main transmission inner wire in the chamber, be equipped with the two piece sampling cables parallel directly over this master's transmission inner wire successively with main transmission inner wire, described sampling cable one end connects the coupling absorbing load, the other end connects the input output interface, the main body upper surface has amphiorentation coupling circuit plate embedded groove, and this trench bottom has the receiving and transmitting signal sampling delivery outlet that is communicated with the transmission channel chamber.

3, base station according to claim 2 multiplexer in pairs is characterized in that the transmission channel chamber of described duplexer is positioned at the centre of duplexer main body, and amphiorentation coupling circuit plate embedded groove is positioned in the middle of the upper surface of duplexer main body.

4, base station according to claim 3 multiplexer in pairs is characterized in that having cover plate on the amphiorentation coupling circuit plate embedded groove in described duplexer main body.

5, according to the multiplexer in pairs of any described base station in the claim 1 to 4, it is characterized in that: the transmitting-receiving low-pass filtering resonant cavity that is positioned at described two duplexer adjacents is arranged up and down.

6, base station according to claim 5 multiplexer in pairs, it is characterized in that: the main body of described two duplexers is an integral structure.

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