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Strip-line high-pass filter

A high-pass filter and stripline technology, applied in the field of filters, can solve the problems of high cost, narrow structure bandwidth of parallel coupling lines, complicated design, etc., and achieve the effect of reducing processing accuracy, reducing cost and compact structure.

Inactive Publication Date: 2013-09-18
成都赛纳赛德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common high-pass filter has a coaxial structure, but to obtain a high cut-off frequency, the high-pass filter with this structure must have a small structure, which requires high processing accuracy, and has lumped components, which is not suitable for low frequency high case
The bandwidth of the parallel coupled line structure is relatively narrow
The quarter-wavelength microstrip coupling line has a simple structure, but the microstrip filter has radiation loss and relatively large insertion loss
The transmission zero point of the waveguide resonator and resonant diaphragm structure is easy to realize, so very few resonators can achieve high out-of-band suppression, so this filter is small in size and compact in structure, but the design is complex and the processing accuracy is high. high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 , as shown in 2 and 3, a stripline high-pass filter includes a transmission line and at least two short-circuit branches connected to the transmission line, the transmission line is mainly composed of a metal cavity 2 and an inner metal cavity 2 The short-circuit branch is mainly composed of a branch cavity 4 and a branch inner conductor 3 arranged inside the branch cavity 4, and the adjacent short-circuit branch is located at one side of the metal cavity 2. side.

[0031] The adjacent short-circuit branches are located on one side of the metal cavity 2 , such an arrangement is beneficial to reduce the space occupied by the filter, and effectively implement a miniaturized design.

[0032] The cross-sectional shape and size of the inner conductor 1 in the direction perpendicular to the axis of the inner conductor 1 are consistent, the shape and size of the metal cavity 2 in the direction perpendicular to the axis of the inner conductor 1 are consistent,...

Embodiment 2

[0040] Such as Figure 4 , Shown in 5, the difference from the first embodiment is that the adjacent short-circuit branches are located on both sides of the metal cavity 2 . A tuning screw 5 is arranged directly above the branch inner conductor 3 , and the length of the tuning screw 5 extending into the branch cavity 4 can be adjusted and fixed from the outside of the branch cavity 4 .

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Abstract

The invention discloses a strip-line high-pass filter. The strip-line high-pass filter comprises a transmission line and at least two shorting stubs which are connected with the transmission line, wherein the transmission line is mainly formed by a metal cavity and an inner conductor arranged inside the metal cavity; each shorting stub is mainly formed by a stub cavity and a stub inner conductor arranged inside the stub cavity; the adjacent shorting stubs are located at one side or two sides of the metal cavity. The strip-line high-pass filter disclosed by the invention has the advantages of simplicity in machining, convenience in debugging and compact structure. The strip-line high-pass filter disclosed by the invention is hopeful to be widely applied to an electronic system of each microwave waveband, and is particularly suitable for military and civil fields of radars, missile guidance, communication and the like.

Description

technical field [0001] The present invention relates to a filter, in particular to a high-pass filter formed by using a strip line and a short-circuit branch. Background technique [0002] Microwave filter is an important component in the microwave circuit system, and it is also the microwave passive device with the highest technical content. Its main function is to extract, separate and suppress interference from signals. Microwave filters are used in a wide range of applications, including wireless communications, navigation, and telemetry. A microwave high-pass filter is a microwave passive device that allows high-frequency signals to pass and suppresses low-frequency signals. Since the filter structure at microwave frequencies generally has a periodic frequency response, there is no ideal high-pass filter response. Generally, broadband band-pass filters at microwave frequencies can be used as high-pass filters, that is, pseudo-high-pass filtering device. The common hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 王清源谭宜成陈勇
Owner 成都赛纳赛德科技有限公司
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