CN103247841A

CN103247841A - Waveguide circulator

Info

Publication number: CN103247841A
Application number: CN2013101593565A
Authority: CN
Inventors: 罗加林
Original assignee: NANJING ZHEN KRONE ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: NANJING ZHEN KRONE ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-05-03
Filing date: 2013-05-03
Publication date: 2013-08-14

Abstract

The invention relates to a microwave passive device, in particular to a waveguide circulator. The waveguide circulator comprises a waveguide cavity, a matching block, ferrite and a permanent magnet, wherein the waveguide cavity is provided with three ports; the permanent magnet is placed outside the waveguide cavity and provides a direct current magnetic field; and only one matching block and one ferrite are provided, the matching block is located at the center of the waveguide cavity, and the ferrite is mounted on the matching block. The waveguide circulator provided by the invention adopts a technology of single-chip matching block and single-chip ferrite, that is, one matching block is placed at the center of the waveguide cavity, and one ferrite is placed on the matching block; due to the fact that the usage quantity of the matching block and the ferrite is reduced to one from two, the problem of performance reduction caused by manufacturing errors and mounting errors is reduced exponentially; and meanwhile, a technology of inside-junction tuning is adopted, so that the problem of impedance matching of the circulator is solved.

Description

Waveguide junction circulator

Technical field

The present invention relates to a kind of microwave passive component, be specially waveguide junction circulator.

Background technology

Waveguide junction circulator is a kind of microwave passive component, this device has three ports, the gyromagnetic effect of utilizing Ferrite Material under the effect of applying dc magnetic field, to produce, make the deflection of the microwave generation certain angle of incident circulator, by second port output, in the then not output of the 3rd port, thereby realize going in ring of microwave signal.

Waveguide junction circulator generally all partly is made up of wave-guide cavity wave, match block, ferrite, permanent magnet etc., and wherein permanent magnet is the outside that is placed on cavity, and D.C. magnetic field is provided; Match block is positioned at the central authorities of wave-guide cavity wave, generally respectively has one up and down, and a ferrite is respectively arranged on each match block, and they constitute a waveguide junction jointly, add match block at the waveguide junction center.Present technology generally is to adopt laterally zygomorphic two leg-of-mutton match block, and laterally zygomorphic two ferrites that lay respectively on two match block, simultaneously add capacitive character or the inductive tuned cell is regulated impedance matching in waveguide port, reach the purpose of impedance matching.

Because the scale error that match block and ferrite produce in the course of processing, and when being installed in them in the cavity owing to be difficult to the error of the installation site of accurate location bringing, cause impedance can not reach fully coupling, must expend the plenty of time to make the performance of device reach requirement by manual debugging.

Summary of the invention

At above-mentioned technical problem, the invention provides a kind of waveguide junction circulator of simple in structure, easy adjusting, concrete technical scheme is:

Waveguide junction circulator, comprise wave-guide cavity wave, match block, ferrite and permanent magnet, wave-guide cavity wave has three ports, described permanent magnet is the outside that is placed on wave-guide cavity wave, D.C. magnetic field is provided, described match block and ferrite respectively have only one, and ferrite tack is at the upper surface of match block, and the lower surface bonds of match block is at the inner surface of wave-guide cavity wave.

Described three ports are on same plane, adjacent between two port angles be 120 degree, three ports are connected in centre junction.

Described match block is triangle, described three angles over against three ports of wave-guide cavity wave, on three angles of described match block, have the adjustment screw of regulating impedance matching respectively respectively, adjustment screw is installed in the screw thread mouth on three angles of match block, perpendicular to the match block surface.By changing the degree of depth that adjustment screw enters cavity, can adjust the impedance of waveguide junction very easily, simultaneously since be directly to waveguide junction impedance regulate, can well make the impedance of waveguide reach coupling, make the performance of circulator reach best.

Because match block and ferrite are not laterally zygomorphic being placed in the cavity, so the electromagnetic distribution in the cavity also is pockety up and down, for addressing this problem, at first be match block and the ferrite of selecting appropriate size, secondly, change the distributing homogeneity of applying dc magnetic field, make device obtain satisfied performance.

The present invention has adopted the technology of monolithic match block and single piece of ferrite, just place a match block in the center of wave-guide cavity wave, place a ferrite in match block, because match block and ferritic use amount are reduced to one by two, reduced exponentially because the reduction of the performance that foozle and alignment error are brought, adopt simultaneously and finish the interior tuning technology of adjustment screw, solved the problem of the impedance matching of circulator.

The present invention has reduced match block and ferritic usage quantity, bigger reduction manufacturing cost and mounting hardness, shortened the debug time of circulator greatly, make production efficiency improve more than 10 times, improved simultaneously the performance of circulator greatly, the isolation that makes circulator is brought up to more than the 33dB about by former 23dB, makes that producing the high-performance circulator in enormous quantities becomes possibility.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is cross-sectional view of the present invention.

Embodiment

Accompanying drawings the specific embodiment of the present invention, the BJ100 waveguide junction circulator is example, as illustrated in fig. 1 and 2, comprise wave-guide cavity wave 1, match block 2, ferrite 3 and permanent magnet, the bore that wave-guide cavity wave 1 has three ports to be respectively 1 port one 1,2 port ones 2,3, three ports of 3 port ones is 22.86mm * 10.16mm, and three port one port ones 1,2 port ones 2,3 port ones 3 are on same plane, two port angles are 120 degree between adjacent, and three ports are connected in centre junction;

Permanent magnet is the outside that is placed on wave-guide cavity wave 1, D.C. magnetic field is provided, match block 2 and ferrite 3 respectively have only one, ferrite 3 is triangle, be of a size of length of side 12.5mm, thickness 5.6mm, ferrite 3 is bonded in the upper surface of match block 2, and the lower surface bonds of match block 2 is at the inner surface of wave-guide cavity wave 1.

Match block 2 is triangle, and length of side 28.5mm, thickness are 4mm, three angles are respectively over against three ports of wave-guide cavity wave 1, on three angles of match block 2, the adjustment screw 4 of regulating impedance matching is arranged respectively, adjustment screw 4 is for regulating fixed screw M3, adjustment screw 4 is installed in the screw thread mouth on three angles of match block 2, perpendicular to match block 2 lower surfaces, the degree of depth that enters cavity is about 1.5mm, and its performance is for inserting loss≤0.2Db, isolation 〉=33Db, standing wave≤1.06.

When microwave is imported by 1 port one 1, because the gyromagnetic effect that ferrite 3 produces, make microwave from 2 outputs of 2 port ones, and 3 port ones 3 do not have the output of microwave signal, same, when microwave is imported by 2 port ones 2, microwave is from 3 outputs of 3 port ones, and 1 port one 1 does not have the output of microwave signal, when microwave was imported by 3 port ones 3, microwave was from 1 output of 1 port one, and 2 port ones 2 do not have the output of microwave signal, so just constituted desirable circulator, its belt direction is 1 port → 2 ports → 3 ports.

Claims

1. waveguide junction circulator, comprise wave-guide cavity wave, match block, ferrite and permanent magnet, wave-guide cavity wave has three ports, described permanent magnet is the outside that is placed on wave-guide cavity wave, D.C. magnetic field is provided, it is characterized in that: described match block and ferrite respectively have only one, and ferrite tack is at the upper surface of match block, and the lower surface bonds of match block is at the inner surface of wave-guide cavity wave.

2. according to the waveguide junction circulator shown in the claim 1, it is characterized in that: described three ports are on same plane, adjacent between two port angles be 120 degree, three ports are connected in centre junction.

3. according to the waveguide junction circulator shown in claim 1 or 2, it is characterized in that: described match block is triangle, described three angles over against three ports of wave-guide cavity wave, on three angles of described match block, have the adjustment screw of regulating impedance matching respectively respectively.

4. according to the waveguide junction circulator shown in the claim 3, it is characterized in that: described adjusting adjustment screw is installed in the screw thread mouth on three angles of match block, perpendicular to the match block surface.