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Miniature microwave millimeter wave self-loaded i/q quadrature 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, excellent electrical performance, and high reliability

Inactive Publication Date: 2017-03-15
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 millimeter wave self-loaded i/q quadrature filter
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  • Miniature microwave millimeter wave self-loaded i/q quadrature filter

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Embodiment Construction

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

[0012] Combine figure 1 a, b, c, a miniature microwave and millimeter wave self-loaded I / Q quadrature filter of the present invention. The microwave and millimeter wave filter of the quadrature filter includes a surface-mounted 50 ohm impedance input port P1 and a first input Inductance Lin1, first-level parallel resonant unit L11, L21, L31, C1, second-level parallel resonant unit L12, L22, L32, C2, third-level parallel resonant unit L13, L23, L33, C3, fourth-level parallel resonance Units L14, L24, L34, C4, fifth-level parallel resonant unit L15, L25, L35, C5, sixth-level parallel resonant unit L16, L26, L36, C6, output inductance Lout, Z-shaped inter-level coupling strip line Z , Each level of parallel resonant unit is composed of three layers of strip lines, the second layer of strip lines are vertically above the third layer of strip lines, the first layer o...

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Abstract

The invention discloses a miniature microwave and millimeter wave self-load I / Q (In-phase / Quadrature) filter which comprises a microwave and millimeter wave filter in a strip line structure and a directional coupler connected with a matched load, 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 connected with the matched load comprises a surface-mounted output interface, wide side coupling strip lines in double spiral structures, and a matched load connected at an isolation port; and the structures are realized by a multi-layer low-temperature co-fired ceramic technology. The filter has the advantages that external load connection is not required; 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 and millimeter wave self-loading I / Q quadrature filter. Background technique [0002] In recent years, with the rapid development of the miniaturization of mobile communications, satellite communications and national defense electronic systems, high performance, low cost, and miniaturization have become the current development direction of the microwave / RF field. The performance, size, and reliability of microwave filters Both performance and cost put forward higher requirements. In some national defense cutting-edge equipment, the current frequency bands are already quite crowded, so cutting-edge equipment such as satellite communications is developing towards the millimeter wave band, so the microwave millimeter wave band filter has become a key electronic component in the receiving and transmitting branch of this band. The main indicators of the performance of this component are: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01P1/203
Inventor 戴永胜周围杨茂雅周衍芳李雁
Owner NANJING UNIV OF SCI & TECH
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