Miniature dual microwave and millimeter wave self-load 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, simple circuit structure, and excellent electrical performance

Inactive Publication Date: 2015-06-24
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

Method used

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  • Miniature dual microwave and millimeter wave self-load I/Q quadrature filter
  • Miniature dual microwave and millimeter wave self-load I/Q quadrature filter
  • Miniature dual microwave and millimeter wave self-load I/Q quadrature filter

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] combine figure 1(a), (b), (c), (d), a miniature dual-microwave millimeter-wave self-loading I / Q quadrature filter of the present invention, the directional coupler of the quadrature filter self-connected to the matching load includes Surface-mounted 50-ohm impedance input port (P1), first matching line (L1), broadside coupled stripline (U1) of the first double helix structure, second matching line (L2), first output inductor (Lout1), the second output inductor (Lout2), the third matching line (L3), the broadside coupled stripline (U2) of the second double helix structure, the fourth matching line (L4), surface mount 50 Ohmic impedance isolation port (P4), tantalum resistor (R), where the broadside-coupled stripline (U1) of the first double helix is ​​perpendicular to the broadside-coupled stripline (U2) of the second double helix Above, the first mat...

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Abstract

The invention discloses a miniature dual microwave and millimeter wave self-load I/Q quadrature filter which comprises a directional coupler and two microwave and millimeter wave filters. Wherein the directional coupler is in self connection with a matched load and the two microwave and millimeter wave filters are each of a strip line structure. The directional coupler in self connection with the matched load comprises a surface-mounted input/output interface, a broadside coupling strip line of a dual spiral structure and the matched load in self connection with an isolation port. The two microwave and millimeter wave filters each comprise a surface-mounted output interface and a six-level parallel resonance unit achieved through the strip line structure, and the structures are achieved through the multi-layer low temperature co-fired ceramic process technology. The miniature dual microwave and millimeter wave self-load I/Q quadrature filter has the advantages of being free of any external load, capable of generating a quadrature phase, easy to debug, small in insertion loss, light, small in size, high in reliability, good in electrical performance, good in temperature stability, good in electrical performance batch consistency, low in cost and the like, and is suitable for communication of corresponding millimeter wave frequency bands, satellite communications, and other occasions and corresponding systems having strict requirements for sizes, electrical performance, temperature stability and reliability.

Description

technical field [0001] The invention relates to a filter, in particular to a miniature double microwave 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: passba...

Claims

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Application Information

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IPC IPC(8): H01P1/203
Inventor 戴永胜周围杨茂雅顾家许心影
Owner NANJING UNIV OF SCI & TECH
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