High-performance distributed 3100-3400 MHz miniature band-pass filter

A band-pass filter, distributed technology, applied in the field of filters, can solve the problems of square coefficient, general stop-band suppression characteristics, coaxial filter structure volume and large insertion loss, limitations, etc., to achieve pass-band interpolation The effect of low loss, light weight and low cost

Inactive Publication Date: 2013-12-18
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional filter design methods, such as resonant cavity filter structure and coaxial line filter structure, have large volume and insertion loss, and filter performance, such as square coefficient and stop-band suppression characteristics, are not good in occasions with strict requirements (such as Handheld wireless communication terminals, individual satellite mobile communication terminals, airborne, missile-borne, aerospace communications, etc.) and corresponding systems are all subject to great restrictions

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  • High-performance distributed 3100-3400 MHz miniature band-pass filter
  • High-performance distributed 3100-3400 MHz miniature band-pass filter
  • High-performance distributed 3100-3400 MHz miniature band-pass 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 high-performance distributed 3100 MHz to 3400 MHz miniature bandpass filter of the present invention, the miniature bandpass filter package includes a surface-mounted 50-ohm impedance input port P1, an input inductance Lin, and a first-stage parallel resonance unit L1 C1, second level parallel resonance unit L2 C2, third level parallel resonance unit L3 C3, fourth level parallel resonance unit L4 C4, fifth level parallel resonance unit L5 C5, sixth level parallel resonance unit L6 C6, Z-shaped level Inter-coupled stripline LC, first U-shaped interstage coupled stripline U1, second U-shaped interstage coupled stripline U2, output inductance Lout, surface-mounted 50-ohm impedance balanced output port P2; input port P1 The input inductance Lin is connected to the second-layer stripline L1 in the first-stage parallel resonant unit, an...

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Abstract

The invention discloses a high-performance distributed 3100-3400 MHz miniature band-pass filter. The band-pass filter comprises an input/output interface and six parallel resonance units, the input/output interface is suitable for surface mounting, the six parallel resonance units are obtained through a strip line structure, and the input/output interface and the six parallel resonance units are all achieved through a multilayer low-temperature cofired ceramic technology. The band-pass filter has the advantages of being wide in frequency coverage range, small in insertion loss, light in weight, small in size, high in reliability, good in electric performance, phase-frequency characteristic linearity, temperature stability and electric performance batch consistency, low in cost, capable of being massively produced, and suitable for communication, digital radars, wireless communication handheld terminals and corresponding systems and other occasions in the requirements for sizes, electric performance, temperature stability and reliability within corresponding microwave frequency bands are demanding.

Description

technical field [0001] The invention relates to a filter, in particular to a high-performance distributed 3.1 to 3.4GHz miniature band-pass filter. Background technique [0002] In modern wireless communication systems, microwave and millimeter wave communication, radar and other systems, especially handheld wireless communication terminals, individual satellite mobile communication terminals, military and civilian multi-mode and multi-channel communication system terminals, airborne, missile-borne, aerospace In the communication system, the miniature microwave intermediate frequency bandpass filter with high stopband suppression is the key electronic component in the receiving and transmitting branches of this band. The main indicators describing the performance of this component are: the working frequency range of the passband, the frequency range of the stopband, Passband insertion loss, stopband attenuation, passband input / output VSWR, insertion phase shift and time dela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
Inventor 陈相治李雁吴健星戴永胜吴迎春
Owner NANJING UNIV OF SCI & TECH
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