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Crossing coupled filter of anti-parallel fold line

A filter and anti-parallel technology, which is applied in the field of filters, can solve the problems of poor passband selectivity of contact antiparallel hairpin comb filters, etc., and achieve good passband selectivity, high passband edge steepness, and coupling small effect

Inactive Publication Date: 2005-10-12
天津海泰光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The passband selectivity of the contact antiparallel hairpin comb filter is poor

Method used

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  • Crossing coupled filter of anti-parallel fold line
  • Crossing coupled filter of anti-parallel fold line
  • Crossing coupled filter of anti-parallel fold line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Embodiment: a kind of cross-coupling filter of antiparallel broken line (see image 3 ), which is characterized in that it is composed of two groups of opposite directions, the number of resonators in each group is the same as 4, and the length is a half-wavelength zigzag resonator. 34. The line-attached microstrip 24 at the input end is connected to the first resonator 20-1 in the filter by connecting the input adjustment sheet 25, and the line-attached microstrip 34 at the output end is connected to the output adjustment sheet 35 and the filter. The last resonator 30-8 is connected to each other, and there are non-contact coupling microstrip lines 21b and 31b between the two resonators in the same group.

[0038] The above-mentioned two groups of zigzag resonators 20-1, 20-2, 20-3, 20-4 and 30-5, 30-6, which have opposite directions, the same number in each group is 4, and the length is half a wavelength. 30-7, 30-8, the shape of each broken-line resonator is differe...

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Abstract

The invention consists of m groups of broken-line resonators that are opposite in direction, and has more than one group members, and has half wavelength length. The output and input of filter is paste line micro-strip. The paste micro-strip in input is connected with first resonator in filter through input setting piece. The paste line micro-strip is connected with last resonator in filter through output setting piece. The non touch coupling micro-strip lines are set between any neighboring resonators in same group.

Description

(1) Technical field: [0001] The invention relates to a filter suitable for wireless communication, in particular to a cross-coupling filter with antiparallel zigzag lines. (two) background technology: [0002] Filter has always been an important component in microwave communication, it has the function of filtering noise and making communication signal clear. According to the function, there are four types of filters: low-pass filter, high-pass filter, band-pass filter and band-stop filter. The function of the band-pass filter is to let the fixed-bandwidth signal pass, and to isolate the lower-frequency and higher-frequency signals. Band-pass filters are particularly important in current mobile communication applications, and are especially suitable for base station receiving and transmitting systems. High-temperature superconducting thin film has a high quality factor (Q value). It is a filter made of high-temperature superconducting thin film. It has the characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H9/46
Inventor 陈国鋕高海霞程耀华
Owner 天津海泰光电科技有限公司
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