CN105676186A

CN105676186A - Feed circuit based on IMPATT diode

Info

Publication number: CN105676186A
Application number: CN201610056178.7A
Authority: CN
Inventors: 张国强; 张生春; 周立学; 饶睿楠; 杨芳红; 彭欢; 雷国忠; 糜光璞; 鄢炜森
Original assignee: Xian Electronic Engineering Research Institute
Current assignee: Xian Electronic Engineering Research Institute
Priority date: 2016-01-27
Filing date: 2016-01-27
Publication date: 2016-06-15
Anticipated expiration: 2036-01-27
Also published as: CN105676186B

Abstract

The invention relates to the design of a feed circuit based on an IMPATT diode and is mainly used for feed and displacement debugging of a 3 mm microwave device based on the IMPATT diode. Through the unique design of upper and lower feeder pillars and a spring, and by utilizing different displacements of the spring under different moments, displacement debugging of the IMPATT diode is realized; through the introduction of an insulating spacer, short circuit due to contact of the feeder pillars and a cavity can be prevented; and through a quasi coaxial filter structure formed by dual metal rings and the feeder pillars, mutual interference between high-frequency signals and DC bias signals can be prevented. Compared with an existing feed circuit based on the IMPATT diode, the feed circuit based on the IMPATT diode in the invention has the advantages of being easy to assemble, adjustable, resistant to interference and small and the like.

Description

A kind of feed circuit based on IMPATT pipe

Technical field

The present invention relates to Radar Technology field, specifically the feed circuit design of a kind of IMPATT pipe, can be applicable to based in the microwave devices such as the note latching amplifier of IMPATT pipe, agitator.

Background technology

In the radar transmitter of W frequency range, in order to obtain high-power transmitting signal, IMPATT pipe is often adopted to carry out generation and the amplification of signal. Avalanche transit time, diode was based in semiconductor PN electric charge (carrier) avalanche multiplication effect and device based on negative resistance charactertistic produced by carrier transit time effect, and IMPATT (ImpactAvalanceheTransitTime) pipe is namely based on this kind of mechanism and realizes generation and the amplification of signal.

Due to " post " shape structure that IMPATT pipe is special, power up end and be positioned at the top of pipe, and the size of pipe only hasThe form that cannot adopt welding feeds, and feeds only by face contact. And the microwave device based on IMPATT pipe only has pipe and cavity Proper Match could realize the microwave property of optimum, generally requires adjustment IMPATT pipe position in cavity, it is desirable to feed circuit can produce displacement along with the position of IMPATT pipe. In document at home and abroad, the feed content about IMPATT pipe occasionally has introduction, but, it is debug feed and displacement individually to consider mostly. The present invention is namely based on the feed of IMPATT pipe and the integrated feed circuit that displacement debugging is designed.

Summary of the invention

Solve the technical problem that

The present invention mainly solves the feed problem of the 3mm microwave device based on IMPATT pipe, special construction due to IMPATT pipe, need to design the feed circuit of a kind of easy assembling, scalable, anti-tampering, miniaturization, the Main Function of this circuit is to provide DC bias signal for IMPATT pipe, and disclosure satisfy that the special clamping requirement of IMPATT pipe.

Technical scheme

The present invention devises a kind of feed circuit with idiotope shifting function. By selecting cylinder and the chassis of various outer diameter, it is achieved cylinder is used for feeding, the purpose that chassis is used for fixing; By spring in the different characteristic of different moment bottom offsets, it is achieved the different displacements of feeder pillar; By the introducing of felt pad, it is prevented that feeder pillar and outer wall short circuit; " chokes ring " is formed, it is prevented that high-frequency signal interferes with DC bias signal by introducing bimetallic ring. Design by above link, it is achieved based on the feed of 3mm microwave device and the commissioning requirements of IMPATT pipe.

A kind of feed circuit based on IMPATT pipe, it is characterised in that include feeder pillar, spring, lower feeder pillar, felt pad, becket and cavity; Upper feeder pillar and lower feeder pillar are constituted by cylinder and disk, the disk of upper feeder pillar is fixed on a port of cavity, the chassis of lower feeder pillar is positioned at the another port of cavity, it is provided with spring between two chassis, the cylinder of lower feeder pillar passes cavity, is sequentially provided with felt pad and becket on the cylinder of lower feeder pillar.

The chassis of described upper feeder pillar is more than the chassis of lower feeder pillar.

Described becket is two.

Described upper feeder pillar, lower feeder pillar, cavity and becket all adopt HPb59-1Y copper.

Described felt pad adopts politef SFB-1.

Described spring adopts 60SiMnA steel wire, and pitch is 0.5mm, and thickness is Φ 0.2mm, and number of total coils is 8.5, is Φ 1.6mm around loop diameter.

Beneficial effect

A kind of feed circuit based on IMPATT pipe that the present invention proposes, has beneficial aspects:

1) easily assemble. Overall employing " tree " shape structure, only need to be sequentially placed into parts, not need extra screw to assist, assemble simple.

2) scalable. Unique feeder pillar and spring design, meet feeder pillar displacement under different moments, improve the adjustable of IMPATT.

3) anti-tampering. The design of special size becket, it is prevented that feed circuit high-frequency signal interferes with direct current signal.

4) miniaturization. Whole feed circuit size is onlyIt is smaller,

Accompanying drawing explanation

Fig. 1 feed circuit overall structure schematic diagram

The upper feeder pillar of 1-, 2-spring, feeder pillar under 3-, 4-felt pad, 5-becket, 6-cavity

Fig. 2 feed circuit feeder pillar structure chart

Fig. 3 feed circuit wall cavity configuration figure

Fig. 4 feed circuit high frequency " chokes ring " structure chart

Detailed description of the invention

In conjunction with embodiment, accompanying drawing, the invention will be further described:

The overall structure of this feed circuit based on IMPATT pipe is illustrated as it is shown in figure 1, whole circuit is made up of upper feeder pillar, spring, lower feeder pillar, felt pad, becket, cavity. Upper and lower feeder pillar is made up of cylinder and chassis respectively, column body passes through the form welded with external signal, realize the feed-in of signal, lower prop directly contacts with IMPATT pipe, offset signal is provided for pipe, upper and lower feeder pillar chassis is inserted in cavity relatively, and adds spring between upper and lower feeder pillar chassis, makes lower feeder pillar can produce corresponding displacement according to moment size. This design, enables on the one hand external dc offset signal be fed directly into circuit, and can meet later stage needs IMPATT pipe on the other hand can the special commissioning requirements of upper and lower displacement. In design, upper and lower feeder pillar and cavity all adopt HPb59-1Y copper as material, the chassis external diameter of lower feeder pillar is smaller compared with the internal diameter of cavity, this is to reduce friction, and by repeatedly calculating required moment size, final selection 60SiMnA steel wire is as the material of spring, pitch is 0.5mm, thickness is Φ 0.2mm, and number of total coils is 8.5, is Φ 1.6mm around loop diameter. Overall structure size is in Table 1,2.

In the lower end of feed circuit, inserting felt pad, bimetallic ring successively, felt pad adopts politef SFB-1, and becket adopts HPb59-1Y copper. In design, the internal diameter of felt pad is suitable with the outside dimension of lower feeder pillar cylinder, ensure that the concentricity of feeder pillar on the one hand, prevents feeder pillar from contacting with outer chamber wall on the other hand and be short-circuited. Simultaneously, bimetallic ring bottom felt pad and feeder pillar form accurate coaxial filter structure, high-frequency signal can be produced to suppress by this structure, prevent high-frequency signal from passing through to interfere between feeder pillar gap leakage and DC bias signal, reaching to optimize the purpose of feed circuit local electric magnetic environment, concrete size is in Table 3.

By actual processing test, this kind of feed circuit disclosure satisfy that the requirement that powers up of IMPATT pipe, and, output DC bias signal frequency spectrum is clean, without other noise jamming.

Table 1 feeder pillar physical dimension

Table 2 wall cavity configuration size

Table 3 high frequency " chokes ring " physical dimension

Invention adopts unique feeder pillar design, it is achieved to functions such as the feed of IMPATT pipe and displacement adjustments. It is characterized in easy assembling, scalable, anti-tampering and miniaturization. Feeder pillar and IMPATT pipe adopt the form that face contact to feed, and are realized the regulatory function of IMPATT pipe by spring displacement under difference moments. The introducing of bimetallic ring, forms accurate coaxial filter structure with feeder pillar, it is prevented that high-frequency signal is interfered by feeder pillar gap and DC bias signal, improves the feed quality of IMPATT pipe. The internal diameter of felt pad is suitable with the external diameter of feeder pillar, it is ensured that the concentricity of whole feed circuit, it is prevented that feeder pillar and wall contacts short circuit.

Claims

1. the feed circuit based on IMPATT pipe, it is characterised in that include feeder pillar (1), spring (2), lower feeder pillar (3), felt pad (4), becket (5) and cavity (6); Upper feeder pillar (1) and lower feeder pillar (3) are constituted by cylinder and disk, the disk of upper feeder pillar (1) is fixed on a port of cavity (6), the disk of lower feeder pillar (3) is positioned at the another port of cavity (6), spring (2) it is provided with between two disks, the cylinder of lower feeder pillar (3) passes cavity (6), is sequentially provided with felt pad (4) and becket (5) on the cylinder of lower feeder pillar (3).

2. the feed circuit based on IMPATT pipe according to claim 1, it is characterised in that the chassis of described upper feeder pillar (1) is more than the chassis of lower feeder pillar (3).

3. the feed circuit based on IMPATT pipe according to claim 1, it is characterised in that described becket (5) is two.

4. the feed circuit based on IMPATT pipe according to claim 1, it is characterised in that described upper feeder pillar (1), lower feeder pillar (3), cavity (6) and becket (5) all adopt HPb59-1Y copper.

5. the feed circuit based on IMPATT pipe according to claim 1, it is characterised in that described felt pad (4) adopts politef SFB-1.

6. the feed circuit based on IMPATT pipe according to claim 1, it is characterised in that described spring (2) adopts 60SiMnA steel wire, and pitch is 0.5mm, and thickness is Φ 0.2mm, and number of total coils is 8.5, is Φ 1.6mm around loop diameter.