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Ultra-wideband micro band rejection filter

A band-pass filter and micro-strip technology, applied in the field of filters, can solve the problems of large volume and insertion loss, and unusable application occasions, and achieve high rejection in the stop band, low insertion loss in the pass band, and circuit implementation structure simple effect

Inactive Publication Date: 2012-07-25
CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filters designed by conventional methods, such as block dielectric filter structures, metal resonator filter structures, and coaxial line filter structures, all have the disadvantages of large volume and insertion loss, and are often unusable for demanding applications

Method used

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  • Ultra-wideband micro band rejection filter
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Embodiment Construction

[0009] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0010] combine figure 1 , figure 2 , the present invention is an ultra-wideband miniature band-stop filter, which includes a surface-mounted 50-ohm impedance input port P1, first-stage parallel resonant units L1, C1, and first-stage series resonant units L2, C2, second-level parallel resonance unit L3, C3, second-level series resonance unit L4, C4, third-level parallel resonance unit L5, C5, third-level series resonance unit L6, C6, fourth-level parallel resonance unit L7, C7, fourth-level series resonant unit L8, C8, fifth-level parallel resonant unit L9, C9, surface-mounted 50-ohm impedance output port P2 and ground terminal; input port P1 and first-level parallel resonant unit L1, C1 is connected, the output port P2 is connected with the fifth-level parallel resonant unit L9, C9, and the other end of the first-level parallel resonant unit L1, C1 is resp...

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Abstract

The invention relates to an ultra-wideband micro band rejection filter, comprising an input / output interface suitable for pasting on a surface, five parallel resonance units and four series resonance units, the structure is implemented by multi-layer low-temperature co-fired ceramic technology. According to the invention, the ultra-wideband micro band rejection filter has the advantages of wide frequency coverage, small insertion loss, light weight, small volume, high reliability, good electrical property, good phase frequency characteristic linearity, good temperature stability, good batch consistency of electrical property, low cost and mass production; therefore, the ultra-wideband micro band rejection filter is particularly suitable for fields such as communication for corresponding microwave frequency range, a digital radar and a wireless communication hand-held terminal which have excessive demands on volume, electrical proper, temperature stability and reliability, and corresponding systems.

Description

technical field [0001] The invention relates to a filter, in particular to an ultra-wideband miniature band-stop filter. Background technique [0002] With the development of microwave and millimeter wave communication, radar and other systems, especially in mobile handheld wireless communication terminals, individual satellite mobile communication terminals, military and civilian multi-mode multi-channel communication system terminals, airborne, missile-borne, aerospace communication systems With the continuous miniaturization of microwave and millimeter wave communication modules, filters are the key electronic components in the receiving and transmitting branches of corresponding bands, and ultra-wideband micro-filters are an important development direction. The main specifications describing the performance of this component are: stopband operating frequency range, passband frequency range, stopband input / output VSWR, stopband insertion loss, passband attenuation, shape ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H03H7/12
Inventor 戴永胜陈建锋范小龙吴建星戚湧吴迎春李旭郭风英韦晨君韩群飞尹洪浩左同生冯媛谢秋月李平孙宏途汉敏王立杰陈少波徐利周聪张红陈曦於秋杉杨健
Owner CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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