阅读说明：本技术 一种改善大衰减良好频响的装置及程控步进衰减器 (Device for improving large attenuation good frequency response and program-controlled step attenuator ) 是由 文春华 王金龙 郑文峰 操基德 于 2019-11-28 设计创作，主要内容包括：本申请公开了提供一种改善大衰减良好频响的装置及程控步进衰减器,包括微波吸收上盖和微波吸收底座,所述微波吸收上盖和微波吸收底座之间共同形成一个两端开口的通道,所述通道内设有微波吸收支撑块,所述微波吸收支撑块上配合有微波传输簧片,微波传输簧片的两端分别从通道两端引出接入外部元件,所述微波吸收底座用于吸收微波传输簧片从微波吸收支撑块传导的微波信号,主要是采用具有吸收功能的支撑装置以及通过在一定位置上布置微波吸收材料,可以实现控制程控步进衰减器在大衰减量状态下的衰减频响,保证了程控步进衰减器的测试精度。(The application discloses provide a device and programme-controlled step attenuator who improves good frequency response of big decay, absorb upper cover and microwave including the microwave, microwave absorbs and forms a both ends open-ended passageway between upper cover and the microwave absorption base jointly, be equipped with the microwave absorption supporting shoe in the passageway, the cooperation has the microwave transmission reed on the microwave absorption supporting shoe, and the both ends of microwave transmission reed are drawn forth respectively from the passageway both ends and are inserted external component, the microwave absorption base is used for absorbing the microwave signal that the microwave transmission reed conducts from the microwave absorption supporting shoe, mainly adopts the strutting arrangement who has absorption function and arranges the microwave absorption material through in a certain position, can realize controlling the decay frequency response of programme-controlled step attenuator under big decrement state, has guaranteed programme-controlled step attenuator's test accuracy.)

1. The device for improving the high-attenuation good frequency response is characterized by comprising a microwave absorption upper cover and a microwave absorption base, wherein a channel with two open ends is formed between the microwave absorption upper cover and the microwave absorption base, a microwave absorption supporting block is arranged in the channel, a microwave transmission reed is matched on the microwave absorption supporting block, two ends of the microwave transmission reed are respectively led out from two ends of the channel and connected into an external element, and the microwave absorption base is used for absorbing microwave signals transmitted by the microwave transmission reed from the microwave absorption supporting block.

2. The apparatus for improving large attenuation good frequency response according to claim 1, wherein microwave absorption blocks are provided at both sides of said microwave absorption supporting block, and said microwave absorption blocks cooperate with the microwave absorption upper cover to control the attenuation frequency response of the high frequency band.

3. The apparatus according to claim 2, wherein the microwave absorbing upper cover has a protrusion on a surface thereof corresponding to the channel, the protrusion facing the microwave absorbing support block and corresponding to the microwave absorbing block.

4. The apparatus for improving large attenuation good frequency response of claim 3, wherein said microwave absorbing blocks are arranged symmetrically on both sides of said microwave absorbing support block; each microwave absorption block is correspondingly provided with a convex part arranged on the microwave absorption upper cover.

5. The apparatus of claim 1, wherein the microwave absorbing support block is made of a low loss material and the microwave absorbing base is made of a high loss material.

6. The apparatus for improving highly attenuated good frequency response of claim 1, wherein said channel further comprises reed supports mounted therein, said reed supports being spaced apart for supporting microwave transmission reeds.

7. A programmable step attenuator comprising an arrangement for improving the good frequency response of large attenuations according to any of claims 1 to 6.

8. The programmable step attenuator of claim 7, further comprising a plurality of serially connected attenuation plates, wherein means for improving the good frequency response of large attenuation are provided between two attenuation plates connected in series and connected through a transmission reed.

Technical Field

The application relates to a device for improving large attenuation good frequency response and a program-controlled step attenuator.

Background

The main function of the program-controlled step attenuator is to control the signal level amplitude and realize the step attenuation of the input signal level amplitude from 0dB to the maximum attenuation of the attenuator. The method is mainly applied to controlling the signal level amplitude entering a system, controlling the output signal power of the system, adjusting the matching between a signal source and a load, and can also be used for simulating the loss of a signal transmission path in a communication system.

The inventor finds that besides the accuracy of the single attenuation sheet, the attenuation frequency response generated by the series combination of the attenuation sheets also needs to be controlled. Theoretically, the attenuation generated by the series connection of any two attenuation sheets should be equal to the sum of the attenuation of the two attenuation sheets. However, in actual products, besides the microwave signals are transmitted along the reed and the attenuation sheet, due to the discontinuity of the transmission line, the microwave signals generate higher-order modes at the discontinuity, and these higher-order mode signals will cause the attenuation frequency response of the attenuator in a high-frequency range and a large attenuation amount state to be poor, so that the conventional program-controlled step attenuator is difficult to realize good frequency response of a large attenuation amount in a high-frequency range, and is difficult to meet the existing good frequency response requirement.

Disclosure of Invention

The purpose of this application is to the defect that prior art exists, provides a device and programme-controlled step attenuator who improves good frequency response of big decay, adopts the strutting arrangement who has the absorption function and through arranging microwave absorption material on a certain position, can realize controlling programme-controlled step attenuator and attenuate frequency response under big attenuation volume state, has guaranteed programme-controlled step attenuator's test accuracy.

The first purpose of this application is to provide a device for improving the good frequency response of large attenuation, adopt the following technical scheme:

the microwave signal transmission device comprises a microwave absorption upper cover and a microwave absorption base, wherein a channel with two open ends is formed between the microwave absorption upper cover and the microwave absorption base, a microwave absorption supporting block is arranged in the channel, a microwave transmission reed is matched on the microwave absorption supporting block, two ends of the microwave transmission reed are respectively led out from two ends of the channel and connected into an external element, and the microwave absorption base is used for absorbing microwave signals transmitted by the microwave transmission reed from the microwave absorption supporting block.

Furthermore, microwave absorption blocks are arranged on two sides of the microwave absorption supporting block and are matched with the microwave absorption upper cover to control the attenuation frequency response of the high-frequency band.

Furthermore, a protruding part is arranged on one surface of the microwave absorption upper cover corresponding to the channel, faces the microwave absorption supporting block and is arranged corresponding to the microwave absorption block.

Furthermore, a plurality of microwave absorption blocks are symmetrically arranged on two sides of the microwave absorption supporting block; each microwave absorption block is correspondingly provided with a convex part arranged on the microwave absorption upper cover.

Furthermore, the microwave absorption supporting block is made of a low-loss material, and the microwave absorption base is made of a high-loss material.

Furthermore, a reed support is further installed in the channel, and the reed supports are arranged at intervals and used for supporting the microwave transmission reeds.

The second purpose of this application is to provide a program-controlled step attenuator, adopt the following technical scheme:

the device for improving the large attenuation good frequency response is arranged between two attenuation sheets which are mutually connected in series and connected through a transmission reed.

Compared with the prior art, the application has the advantages and positive effects that:

(1) the supporting device with the absorption function is arranged outside the microwave transmission reed, and the microwave absorption material is arranged in a matched manner to absorb the high-order mode generated in the discontinuous transmission process, so that the interference of the high-order mode signal to the attenuation frequency response is avoided, the problem that the attenuation frequency response of the attenuator is poor in a high-frequency band and large attenuation amount state is solved, and the good frequency response of the attenuator in the high-frequency band and large attenuation amount state is improved;

(2) the microwave absorption base is made of high-loss materials, and the microwave absorption supporting block is made of low-loss materials, so that microwave signals conducted from the microwave transmission reed can be absorbed, and the increase of the direct loss of the microwave transmission signals of the program control step attenuator can be avoided;

(3) the microwave absorption block and the microwave absorption upper cover are arranged on the left side, the right side and the upper surface of the microwave absorption supporting block according to a certain rule, so that the attenuation frequency response of large attenuation at a high frequency band can be effectively controlled, and the test precision of the program-controlled step attenuator is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic structural diagram of an apparatus for improving a large attenuation good frequency response in embodiment 1 of the present application.

The microwave absorbing device comprises a microwave absorbing upper cover, a microwave transmission reed, a microwave absorbing base, a microwave absorbing support block, a microwave absorbing block and a microwave absorbing spring, wherein the microwave absorbing upper cover is 1, the microwave transmission reed is 2, the microwave absorbing base is 3, the microwave absorbing support block is 4, and the microwave absorbing block.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As described in the background art, in the actual product of the prior art, besides the microwave signal is transmitted along the reed and the attenuation sheet, the microwave signal may generate higher-order modes at the discontinuous portions due to the discontinuity of the transmission line, and these higher-order mode signals will cause the attenuation frequency response of the attenuator in the high-frequency band and large attenuation amount states to be degraded, so that it is difficult for the current program-controlled step attenuator to achieve good frequency response of large attenuation amount in the high-frequency band, and it is difficult to meet the current good frequency response requirements.