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Miniature microwave and millimeter wave self-load I/Q (In-phase/Quadrature) filter

An orthogonal filter and millimeter wave technology, applied in the field of filters, can solve the problem of not having orthogonal functions, and achieve the effects of light weight, simple circuit implementation structure, and excellent electrical performance.

Inactive Publication Date: 2015-03-11
NANJING UNIV OF SCI & TECH
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  • 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 self-load I/Q (In-phase/Quadrature) filter
  • Miniature microwave and millimeter wave self-load I/Q (In-phase/Quadrature) filter
  • Miniature microwave and millimeter wave self-load I/Q (In-phase/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 1a, b, c, a kind of miniature microwave millimeter wave self-load I / Q orthogonal filter of the present invention, the microwave millimeter wave filter of this orthogonal filter comprises the 50 ohm impedance input port P1 of surface mounting, the first input Inductor Lin1, first stage parallel resonance unit L11, L21, L31, C1, second stage parallel resonance unit L12, L22, L32, C2, third stage parallel resonance unit L13, L23, L33, C3, fourth stage parallel resonance Units L14, L24, L34, C4, fifth-level parallel resonance units L15, L25, L35, C5, sixth-level parallel resonance units L16, L26, L36, C6, output inductance Lout, Z-shaped inter-level coupling stripline Z , all levels of parallel resonant units are composed of three layers of striplines, the second layer of striplines is vertically above the third layer of striplines, the fir...

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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-loaded I / Q quadrature filter. Background technique [0002] In recent years, with the rapid development of miniaturization of mobile communication, satellite communication and national defense electronic systems, high performance, low cost and miniaturization have become the development direction of the microwave / radio frequency field. The performance, size and reliability of microwave filters Both sex and cost have put forward higher requirements. In some cutting-edge defense equipment, the current frequency bands are quite crowded, so cutting-edge equipment such as satellite communications are developing towards the millimeter-wave band, so microwave millimeter-wave band filters have become key electronic components in the receiving and transmitting branches of this band, described The main indicators of the performance of this component are: passband ...

Claims

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Application Information

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Patent Type & Authority Applications(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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