CN201466178U

CN201466178U - Adjustable duplexer

Info

Publication number: CN201466178U
Application number: CN200920103979XU
Authority: CN
Inventors: 王清芬; 李志永; 王�琦
Original assignee: CETC 54 Research Institute
Current assignee: CETC 54 Research Institute
Priority date: 2009-08-03
Filing date: 2009-08-03
Publication date: 2010-05-12
Anticipated expiration: 2019-08-03

Abstract

The utility model discloses an adjustable duplexer, which comprises a duplexer body. A receiving adjustable filter (1), a transmitting adjustable filter (2) and a waveguide circulator 3 are arranged in the body, and a resonant cavity (5) and a coupling cavity (6) are respectively arranged in the receiving adjustable filter (1) and the transmitting adjustable filter (2). The adjustable duplexer is characterized in that one sidewall of the resonant cavity (5) is provided with a through hole, a tuning rod (7) penetrates through the through hole, one end of the tuning rod (7) is inserted in the resonant cavity (5), and the other end of the tuning rod (7) is connected with an adjusting mechanism. The utility model has the advantages of high operating frequency and wide tuning range, satisfies the C-band and X-band application requirements in the communication system, and realizes low insertion loss and high tuning precision.

Description

A kind of adjustable double multiplexer

Technical field

The utility model relates to the duplexer of finishing transmitting-receiving alien frequencies function in a kind of channel that is applicable to communication system, refers in particular to a kind of adjustable duplexer.

Background technology

At present at the communication system C-band, the electronic adjustable duplexer of successful Application on the X-band, make the performance of communication system be greatly improved, what but these two kinds of duplexers adopted at present is the quarter-wave coupled structure, its weak point is its coupling amount to be increased gradually with the rising of frequency, the absolute bandwidth that causes duplexer makes the efficient of communication system weaken greatly along with the rising of frequency increases greatly.

The utility model content

The utility model technical issues that need to address provide a kind of operating frequency height, and tuning range is wide, and the insertion loss is little, the high adjustable duplexer of tuning precision.

For solving the problems of the technologies described above, technical solution adopted in the utility model is:

A kind of adjustable double multiplexer, comprise the duplexer body, be provided with in the body and receive tunable filter, send tunable filter, waveguide junction circulator, receive tunable filter and send in the tunable filter and be respectively arranged with resonant cavity and coupling cavity structure, a sidewall of resonant cavity is provided with through hole, tuning plug runs through through hole, and the one end inserts in the resonant cavity, and the other end is connected with governor motion.

As improvement of the present utility model, described resonant cavity is a waveguiding structure.

As improvement of the present utility model, described coupling cavity structure is tooth and the rod structure that is provided with at interval on the upper and lower inwall of resonant cavity.Wherein, tooth is that an end is fixed on the inwall, and the other end is free end and the structure that is not connected with opposed inner walls; Post is the structure that two ends are connected with inwall respectively.

As improvement of the present utility model, described governor motion is a pull bar.Pull bar can be connected with motorized adjustment device etc.

As improvement of the present utility model, described through hole is arranged on the sidewall on the narrow limit of resonant cavity.Cross section as the waveguide of resonant cavity is a rectangle, and described narrow limit is meant rectangular narrow limit.

As improvement of the present utility model, described through hole and corresponding pull bar are a plurality of.

Owing to adopted technique scheme, the obtained technological progress of the utility model is:

The reception tunable filter 1 of the utility model design, send tunable filter 2, its operating frequency height, tuning range is wide, satisfies the instructions for use of C-band in the communication system, X frequency range.

2. the utility model has designed resonant cavity, coupling cavity structure and tuning plug, makes that to insert loss little, the tuning precision height, and most importantly make the absolute bandwidth of duplexer remain unchanged with the rising of frequency.

Description of drawings

Fig. 1 is an electric functional-block diagram of the present utility model;

Fig. 2 is the structural representation that receives tunable filter in the utility model or send tunable filter;

Fig. 3 is a coupling cavity structural representation in the utility model.

Wherein: 1, receive tunable filter; 2, send tunable filter; 3, waveguide junction circulator; 4, pull bar; 5, resonant cavity; 6, coupling cavity structure; 7, tuning plug; 8, tooth; 9, post.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further details:

With reference to Fig. 1, Fig. 2, the utility model is made up of reception tunable filter 1, transmission tunable filter 2, waveguide junction circulator 3.Fig. 1 is an electric functional-block diagram of the present utility model, embodiment presses the connection line of Fig. 1, the signal that its workflow is exported from high power amplifier enters transmission tunable filter 2 and delivers to antenna through waveguide junction circulators 3, the signal that receives from antenna enters into via waveguide junction circulator 3 and receives tunable filter 1 and deliver to LNA, finishes the reception and the process of transmitting of communication.Embodiment waveguide junction circulator 3 adopts commercially available general wave-beam guide circulator parts to make.

It is to finish transmitter output filter function that the utility model sends tunable filter 2 effects, and it is outer spuious effectively to suppress power amplifier output band, prevent this machine send out the passage band outer spuious enter to form in this machine receiver band disturb.Receiving tunable filter 1 effect is to finish receiver preselection filter function, outside the outer clutter interference of not only filtering receiving belt, also provides enough inhibition to this machine originating terminal signal, and the power that prevents to make a start makes the receiving end amplifier saturated.

The utility model receives electrically tunable filter 1 or sends electrically tunable filter 2 and includes pull bar 4, resonant cavity 5, coupling cavity structure 6, tuning plug 7.Wherein tuning plug 7 one ends by securing member be connected with pull bar 4, the other end inserts in the resonant cavity 5, insert tuning plug 7 by resonant cavity 5 Narrow Wall of Waveguide limits and regulate resonance frequencys.

Pull bar 4 can be connected with motorized adjustment device etc., and its effect is to finish electronic tuber function.

Tuning plug 7 effect is to regulate resonance frequency according to the degree of depth that its inserts resonant cavity 5, inserts the degree of depth of resonant cavity 5 and is adjusted by pull bar 4, can design many tuning plugs according to the requirement of technical indicator and carry out tuningly, and embodiment adopts 3 tuning plugs.

Resonant cavity 5 is processed into integrative-structure with coupling cavity structure 6, and resonant cavity 5 adopts waveguide fabrication, and resonant cavity 5 effects are the resonance to frequency, finish filter function, is connected with external high power amplifier, LNA, antenna.6 effects of coupling cavity structure are couplings of finishing input/output signal, and coupling cavity structure 6 adopts a kind of coupled structure of tooth strutting form, improves coupling performance, is fit to motorized adjustment.

The utility model mounting structure is as follows: the parts among Fig. 1 are connected with external high power amplifier, LNA, antenna by waveguide, form the utility model.

Claims

1. adjustable double multiplexer, comprise the duplexer body, be provided with in the body and receive tunable filter (1), send tunable filter (2), waveguide junction circulator 3, receive tunable filter (1) and send and be respectively arranged with resonant cavity (5) and coupling cavity structure (6) in the tunable filter (2), it is characterized in that: a sidewall of resonant cavity (5) is provided with through hole, tuning plug (7) runs through through hole, and the one end inserts in the resonant cavity (5), and the other end is connected with governor motion.

2. a kind of adjustable double multiplexer according to claim 1 is characterized in that: described resonant cavity (5) is a waveguiding structure.

3. a kind of adjustable double multiplexer according to claim 2 is characterized in that: tooth (8) and post (9) structure of described coupling cavity structure (6) for being provided with at interval on the upper and lower inwall of resonant cavity (5).

4. a kind of adjustable double multiplexer according to claim 3 is characterized in that: described governor motion is a pull bar (4).

5. a kind of adjustable double multiplexer according to claim 4 is characterized in that: described through hole is arranged on the sidewall on the narrow limit of resonant cavity (5).

6. a kind of adjustable double multiplexer according to claim 4 is characterized in that: described through hole and corresponding tuning plug (7) are for a plurality of.