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Wideband mini low temperature co-fired ceramic balance filter

A low-temperature co-fired ceramics, balanced filter technology, applied in the field of filters, can solve problems such as unusability, low amplitude unbalance, low phase unbalance, etc., and achieves low cost, frequency bandwidth, and electrical performance consistency. Good results

Inactive Publication Date: 2013-05-22
江苏万邦微电子有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, research on the design of microwave filters and baluns alone has appeared, but there is no balanced filter that integrates the two to achieve miniaturization, low phase imbalance, and low amplitude imbalance. Therefore, for demanding It is often not possible to use

Method used

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  • Wideband mini low temperature co-fired ceramic balance filter
  • Wideband mini low temperature co-fired ceramic balance filter
  • Wideband mini low temperature co-fired ceramic balance 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 , figure 2 , the present invention is a broadband miniature low temperature co-fired ceramic balanced filter, comprising a surface-mounted 50-ohm impedance input port P1, a five-stage high-pass filter, an improved three-wire coupling balun, and a surface-mounted 50-ohm impedance The first output port P2 and the second output port P3 and the ground terminal; the five-stage high-pass filter is composed of the first inductance L1, the second inductance L2, the third inductance L3, the first capacitor C1, the second capacitor C2, and the third capacitor C3 , the fourth capacitor C4, and the fifth capacitor C5; the improved three-wire coupled balun consists of the first coupled stripline M1, the second coupled stripline M2, the third coupled stripline M3, and the fourth coupled stripline M4 One end of the input port P1 is connected to an...

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Abstract

The invention discloses a wideband mini low temperature co-fired ceramic balance filter. The wideband mini low temperature co-fired ceramic balance filter comprises an input port and two output ports applicable to surface mounting, two cascade connection capacitors, three zero capacitors, three zero inductors, four coupling strip lines and a ground connection port, wherein each element is designed by using a lumped parameter strip line, and the structure is achieved by using multilayer low temperature co-fired ceramic process technology. The wideband mini low temperature co-fired ceramic balance filter has the advantages of being small in size, wide in frequency band, low in weight, high in reliability, good in phase frequency character linearity, good in temperature stability, low in cost, and capable of being produced in large batch quantity, having low phase unbalance performance and low amplitude unbalance performance and the like, wherein the advantage of being small in size has extremely important significance for research of microwave system miniaturization. A microwave balance filter is an extremely important device in a modern wireless communication system. Furthermore, the wideband mini low temperature co-fired ceramic balance filter is applicable to a radio frequency front end module.

Description

technical field [0001] The invention relates to a filter, in particular to a broadband miniature low-temperature co-fired ceramic balanced filter. Background technique [0002] With the increasing popularity of wireless communication and personal wireless electronic terminal products, the goals of excellent performance, small size, low cost and high reliability have attracted more and more attention and pursuit, especially the miniaturization of devices has become the frontier and hot spot of research. RF passive devices are an important part of the RF module. Due to the inherent characteristics of RF passive devices, they occupy a large volume in the system, and the volume reduced by planar integration technology is far from meeting engineering requirements. The laminated structure based on low temperature co-fired ceramic technology (Low Temperature Co-fired Ceramic, LTCC) has the advantages of small size, low cost, simple structure, reliable performance, etc. has been wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P11/00
Inventor 戴永胜朱勤辉施淑媛罗鸣张林杨静霞陈龙朱丹邓良李雁冯辰辰顾家陈湘治方思慧
Owner 江苏万邦微电子有限公司
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