CN1141753C

CN1141753C - Microwave coaxial fixed attenuator

Info

Publication number: CN1141753C
Application number: CNB011426225A
Authority: CN
Inventors: 王轿兴
Original assignee: SHANGHAI CO Ltd OF FINE SCIENTIFIC INSTRUMENTS
Current assignee: SHANGHAI CO Ltd OF FINE SCIENTIFIC INSTRUMENTS
Priority date: 2001-12-11
Filing date: 2001-12-11
Publication date: 2004-03-10
Anticipated expiration: 2021-12-11
Also published as: CN1354533A

Abstract

The present invention relates to a microwave passive device, particularly to a microwave coaxial attenuator. The attenuator comprises a coupling head, a clamping ring, a shell seat, insulators, an inserting pin, an attenuation sheet, plugs, a shell cover, a socket and a fastening nut, wherein one end surface of the fastening nut has an inner edge, screw threads are arranged outside the rear end of the shell seat, and an outer edge is outside the rear end of the shell cover; the plug at one end of the attenuation sheet is inserted in an elastic inserting hole at the rear end of the inserting pin in the insulator in a front end chamber of the shell seat, and the plug at the other end of the attenuation sheet is inserted in an elastic inserting hole at the rear end of the socket in the insulator in a front end chamber of the shell cover. The fastening nut is arranged at the rear end of the shell seat, and the inner edge of the fastening nut buckles the outer edge at the rear end of the shell cover. Due to the adoption of an outside fastening method to assemble the attenuation sheet in the coaxial fixed attenuator, the attenuation sheet can not be twisted and damaged, and the operation of the coaxial attenuator is easy; thereby, the microwave coaxial attenuator ensures high accuracy, high reliability, small size and light weight of a product and greatly improves the qualified rate of a product.

Description

Microwave coaxial fixed attenuator

Technical field

The present invention relates to microwave passive component, particularly a kind of microwave coaxial fixed attenuator.

Background technology

Coaxial fixed attentuator is a kind of important devices that is used for microwave communication, radar in a large number, along with the develop rapidly of microwave technology, aspects such as the precision of coaxial fixed attentuator, reliability, body are light has in a small amount been proposed more and more higher requirement.Simultaneously, in large-scale production, how improving the qualification rate of product, reduce production costs, also is a problem that presses for solution.The attenuator that coaxial fixed rate subtracts in the device is a pin network of printing out connection in series-parallel resistance composition on dielectric substrate, obtain accurate microwave attenuation amount, low voltage standing wave ratio, very little phase shift, flat frequency response, and bearing certain power, substrate will be got over Bao Yuehao.And attenuator when assembling, the very easily deformation fracture of the attenuator of quality crisp fritter becomes a difficult problem that influences coaxial fixed attentuator precision, performance, output.(as shown in Figure 1) of the inner fastening means assembling of the most of employing of existing coaxial fixed attentuator attenuator, with attenuator 6 shell block 03 of packing into, one end plug 7 inserts the jack of socket 9 rear ends, when shell block 03 turn is inserted in when fastening in cap 08 rear end, owing to do not see the plug 7 of attenuator 6 other ends, can't aim at the jack position of contact pin 5 rear ends in the cap 08, whether the cooperation that can not differentiate jack is correct.At this moment rotate cap 08, attenuator is reversed and deform and break.Owing to can not guarantee concentricity, will increase shim, Installation and Debugging repeatedly during assembling.As the famous Hewlett-Packard Corporation of microwave apparatus manufacturer of the U.S., its coaxial fixed attentuator also is to adopt inner fastening mode to assemble attenuator.The coaxial fixed attentuator that also has is connected with plug with spring, though can avoid assembling like this time attenuator reverse splintering problem, the reliability of its connection is relatively poor, has reduced the precision and the reliability of attenuator.

Summary of the invention

The present invention is in order to solve the existing problem of the inner fastening assembling attenuator of attenuator, and provides a kind of outside fastening microwave coaxial fixed attenuator.Technical scheme of the present invention.A kind of microwave coaxial fixed attenuator comprises connector, snap ring, shell block, insulator, contact pin, attenuator, plug, cap, socket, also has clamp nut; Wherein clamp nut one end face has inner edge, and there is screw thread in the outside, shell block rear end, and there is outer rim in the outside, cap rear end; Wherein connector is fixed on the shell block front end that is embedded with snap ring by dress, one end plug of attenuator inserts in the rear end elastic hole of the contact pin in the inner insulator of shell block front end chamber, in the elastic hole of the socket rear end in the insulator in the plug insertion cap front end chamber of its other end, clamp nut passes cap and is installed in the shell block rear end by screw thread, its inner rim fastens the outer rim of cap rear end, and the cap front end is equipped with connector.

Above-mentioned attenuator, wherein gapped between cap outer rim bottom face and the shell block rear end face.

Above-mentioned attenuator, wherein clamp nut and shell block, cap lateral surface wrap up with polytetrafluoroethylene strip and other barrier materials.

Because the present invention taked above technical measures, with the attenuator in the outside fastening method assembling coaxial fixed attentuator, operate very easyly, and guaranteed the high accuracy of product, reliability, volume is little, and is in light weight, improved the qualification rate of product greatly, reduced production cost, effect is remarkable.

Description of drawings

Fig. 1 is the original structure schematic diagram of microwave coaxial fixed attenuator.

Fig. 2 is a structural representation of the present invention.

Embodiment

As shown in Figure 2, a kind of microwave coaxial fixed attenuator comprises connector 1, snap ring 2, shell block 3, insulator 4, contact pin 5, attenuator 6, plug 7, cap 8, socket 9, Connection Block 14, also has clamp nut 10; Wherein clamp nut 10 1 end faces have inner edge 11, and there is screw thread 12 in the outside, shell block 3 rear ends, and there is outer rim 13 in the outside, cap 8 rear ends; Wherein connector 1 is fixed on shell block 3 front ends that are embedded with snap ring 2, one end plug 7 of attenuator 6 inserts in the elastic hole of contact pin 5 rear ends in the shell block 3 front end chamber inner insulators 4, in the elastic hole of socket 9 rear ends in the insulator 4 that the plug 7 of its other end inserts in the cap 8 front end chambeies, clamp nut 10 passes cap 8 and is installed in shell block 3 rear ends by screw thread 12, its inner rim 11 fastens the outer rim 13 of cap 8 rear ends, and cap 8 front ends are equipped with Connection Block 14.

Key of the present invention is the outside fastening structure that coaxial fixed attentuator has adopted clamp nut 10.When assembling attenuator 6, earlier an end of attenuator slightly is in the elastic hole of plug 7 straight insertion beryllium-bronze contact pins 7 rear ends of taper, again the elastic hole of beryllium-bronze socket 9 rear ends in the insulator 4 in the cap 8 front end chambeies is aimed at the other end plug 7 and shell block 3 parallel closing of attenuator 6, then, put clamp nut 10 from cap 8-end, screw with the screw thread 12 of Side outside shell block 3 rear ends, inner edge 11 and outer rim 13 are fastened, operate very easy.Because it is impaired that attenuator 6 can not produce rotation in assembling process, so can adopt ultrathin substrate to make high-precision attenuator.

Between shell block 3 rear end faces and cap 8 rear end outer rims 13 gapped 15, can guarantee during assembling that cap 8 rear ends stretch in shell block 3 chambeies outer conductor that the end face of part withstands attenuator 6, with tight connection and the assurance concentricity that realizes the attenuator structure, thereby make attenuator reach good electrical properties.

Above described only be the outside fastening example of attenuator.The said outside of the present invention is fastening to be fit (inner fastening) for existing attenuator, two plugs that are attenuator are respectively in the elastic hole of the contact pin in parallel insertion shell blocks, the cap, socket, and shell block, cap constitute the attenuator housing by securing member from external stability.

After assembling is finished,,, can strengthen the sealing of attenuator, improve the adaptability of attenuator adverse circumstances with polytetrafluoroethylene strip and other barrier materials parcel (not drawing among the figure) in the outside of clamp nut 10 with stainless steel shell block 3, cap 8.

Claims

1, a kind of microwave coaxial fixed attenuator, comprise connector (1), snap ring (2), shell block (3), insulator (4), contact pin (5), attenuator (6), plug (7), cap (8), socket (9), Connection Block (14), it is characterized in that: also have clamp nut (10); Wherein clamp nut (10) one end faces have inner edge (11), and there is screw thread (12) in the outside, shell block (3) rear end, and there is outer rim (13) in the outside, cap (8) rear end; Wherein connector (1) is fixed on shell block (3) front end that is embedded with snap ring (2), one end plug (7) of attenuator (6) inserts in the elastic hole of contact pin (5) rear end in shell block (3) the front end chamber inner insulator (4), the plug of its other end (7) inserts in the elastic hole of socket (9) rear end in cap (8) the front end chamber inner insulator (4), clamp nut (10) passes cap (8) and is installed in shell block (3) rear end by screw thread (12), its inner rim (11) fastens the outer rim (13) of cap (8) rear end, and cap (8) front end is equipped with Connection Block (14).

2, attenuator according to claim 1 is characterized in that: wherein between cap (8) outer rim (13) bottom face and shell block (3) rear end face gapped (15).

3, attenuator according to claim 1 is characterized in that: wherein clamp nut (10) wraps up with barrier material with shell block (3), cap (8) lateral surface.