C-band broadband micro-strip band-pass filter with high image rejection performance

A technology of image suppression and band-pass filtering, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problem of not meeting the requirements of the image suppression index and the influence of frequency accuracy, and achieve the goal of increasing the image suppression index and improving the suppression. Features, the effect of improving application performance

Active Publication Date: 2015-07-08
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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Problems solved by technology

If the existing design is used to complete the design of the traditional 6-8GHz broadband parallel coupling filter, it will not meet the requirements of the image suppression index when the whole machine is used, and it will affect the accuracy of the frequency in the signal analysis of the whole machine

Method used

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  • C-band broadband micro-strip band-pass filter with high image rejection performance
  • C-band broadband micro-strip band-pass filter with high image rejection performance
  • C-band broadband micro-strip band-pass filter with high image rejection performance

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, a C-band broadband microstrip bandpass filter with high image rejection of the present invention includes a first fan-shaped line filter structure, a first microstrip line connection structure, a hairpin type bandpass filter structure, and a second microstrip line The connection structure and the second fan-shaped line filter structure; wherein one end of the hairpin-type band-pass filter structure is connected to the first fan-shaped line filter structure through the first microstrip line connection structure, and the other end of the hairpin-type band-pass filter structure is connected through the second The microstrip line connection structure is connected to the second sector line filter structure.

[0023] The present invention utilizes the design theory of the traditional parallel coupled micro...

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Abstract

The invention provides a C-band broadband micro-strip band-pass filter with high image rejection performance, comprising a first fan-shaped line filter structure, a first micro-strip line connection structure, a hairpin band-pass filter structure, a second micro-strip line connection structure, and a second fan-shaped line filter structure, wherein one end of the hairpin band-pass filter structure is connected with the first fan-shaped line filter structure through the first micro-strip line connection structure, and the other end of the hairpin band-pass filter structure is connected with the second fan-shaped line filter structure through the second micro-strip line connection structure. According to the C-band broadband micro-strip band-pass filter with high image rejection performance of the invention, the fan-shaped line filter structures are added in design on the basis of a traditional hairpin band-pass micro-strip filter to improve the capability of the filter to suppress high-frequency stop band so as to increase the image rejection index of the filter in actual connection and enhance the application performance of the filter.

Description

technical field [0001] The invention belongs to the technical field of radio frequency circuits, in particular to a C-band (6-8GHz band) broadband microstrip band-pass filter with high image rejection. Background technique [0002] The existing microstrip bandpass filter mainly relies on the design idea of ​​parallel coupled line bandpass filter, and then derives microstrip bandpass filter models such as hairpin filter and cross-coupled filter. The basic design idea is to use microstrip Multiple parallel resonator structures composed of striplines are used to complete the signal filtering function. In the existing microstrip bandpass filter design, the stopband The importance of suppressing indicators. [0003] With the development of technology in the field of broadband signal analysis, the frequency of digital analysis equipment that can analyze signals is getting higher and higher, and the frequency of intermediate frequency signals generated in RF frequency conversion m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 胡韵泽
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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