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Miniature microwave and millimeter wave I/Q filter

An orthogonal filter and millimeter-wave technology, applied in the field of filters, can solve problems such as not having an orthogonal function, and achieve the effects of light weight, simple circuit structure, and low cost

Inactive Publication Date: 2015-04-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the filter used in the traditional situation does not have an orthogonal function, but is realized by an external orthogonalizer

Method used

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  • Miniature microwave and millimeter wave I/Q filter
  • Miniature microwave and millimeter wave I/Q filter
  • Miniature microwave and millimeter wave I/Q filter

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Embodiment Construction

[0011] The present invention will be described in further detail below with reference to the accompanying drawings.

[0012] combine figure 1a, b, c, the present invention is a miniature microwave millimeter wave I / Q quadrature filter, the microwave millimeter wave filter of the quadrature filter includes a surface-mounted 50 ohm impedance input port P1, a first input inductor Lin1 , the first-stage parallel resonance unit L11, L21, L31, C1, the second-stage parallel resonance unit L12, L22, L32, C2, the third-stage parallel resonance unit L13, L23, L33, C3, the fourth-stage parallel resonance unit L14 , L24, L34, C4, the fifth-stage parallel resonance unit L15, L25, L35, C5, the sixth-stage parallel resonance unit L16, L26, L36, C6, the output inductance Lout, the Z-shaped interstage coupling stripline Z, each The level parallel resonant units are all composed of three layers of striplines, the second layer stripline is vertically above the third layer stripline, the first l...

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Abstract

The invention discloses a miniature microwave and millimeter wave I / Q filter which comprises a microwave and millimeter wave filter in a strip line structure, and a directional coupler, wherein the microwave and millimeter wave filter comprises a surface-mounted input interface, and six-stage parallel resonance units realized in strip line structures; the directional coupler comprises a surface-mounted output interface, and wide side coupling strip lines in double spiral structures; and the structures are realized by a multi-layer low-temperature co-fired ceramic technology. The filter has the advantages that a quadrature phase can be generated; and the filter is easy to debug, low in insertion loss, light in weight, small in size, high in reliability, good in electrical property, good in temperature stability, good in electrical property batch consistency and low in cost, and facilitates large-batch production. The filter is applicable to occasions and corresponding systems with strict requirements for the size, the electrical property, the temperature stability and the reliability, such as corresponding millimeter wave band communication and satellite communication.

Description

technical field [0001] The invention relates to a filter, in particular to a miniature microwave millimeter wave I / Q quadrature filter. Background technique [0002] In recent years, with the rapid development of the miniaturization of mobile communication, satellite communication and defense electronic systems, high performance, low cost and miniaturization have become the development direction of the current microwave / radio frequency field. Both performance and cost put forward higher requirements. In some state-of-the-art defense equipment, the frequency band used is already quite crowded, so cutting-edge equipment such as satellite communications is developing towards the millimeter-wave band, so microwave and millimeter-wave band filters have become key electronic components in the receiving and transmitting branches of this band, the description The main indicators of the performance of this component are: passband operating frequency range, stopband frequency range, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 周围周衍芳戴永胜李雁杨茂雅
Owner NANJING UNIV OF SCI & TECH
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