High stop-band inhibiting multi-zero 2.4 GHz mini filter

A band suppression, gigahertz technology, applied in impedance networks, multi-terminal pair networks, electrical components, etc., can solve the problems of electrical performance such as temperature drift, large insertion loss, small module size, etc., to achieve low passband insertion loss, reflection Low loss and simple structure

Inactive Publication Date: 2010-02-03
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In addition to the cost factor, there are two technical problems in the production of the commercial application of the Bluetooth module: one is the miniaturization of the module; the other is how to achieve the best design including passive components
), the volume of the filter is proportional to the working wavelength, so the volume is larger
With surface acoustic wave filter technology, although the volume can be reduced, its electrical performance has the disadvantages of temperature drift, high cost, and large insertion loss, which are subject to high temperature stability and low insertion loss requirements. very restrictive

Method used

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  • High stop-band inhibiting multi-zero 2.4 GHz mini filter
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  • High stop-band inhibiting multi-zero 2.4 GHz mini filter

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] to combine figure 1 , figure 2 , image 3 , Figure 4 , the multi-zero 2.4 gigahertz microfilter with high stop band suppression of the present invention comprises a surface-mounted 50 ohm impedance input port Port1, a first-level zero-point setting circuit L3, C3, and a second-level first zero-point setting circuit L4, C4, first stage parallel resonance unit L1, C1, first stage second zero point setting circuit L5, C5, second stage second zero point setting circuit L6, C6, first interstage coupling capacitor C12-1 , the first inter-stage coupling inductor L12, the second inter-stage coupling capacitor C12-2, the second-stage parallel resonant unit L2, C2, the surface-mounted 50-ohm impedance output port Port2 and the ground terminal; the input port Port1 and the first-stage A zero point setting circuit L3, C3 is connected, the output port Port2 i...

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Abstract

The invention relates to a high stop-band inhibiting multi-zero 2.4 GHz mini filter, comprising an input/output interface arranged on the surface, two parallel-resonance units, an interstage couplingelectric capacity and an inductance and two sets of zero set circuits; and all the parts are produced by low temperature co-fired ceramic technology. The mini filter has the advantages of small volume, light weight, high reliability, excellent electric property, linear change of phase frequency character, good temperature stability, excellent consistency of electric property indicator batch, low cost for multitudinous production and the like, especially applicable to Bluetooth transmission, industry, science and medication (ISM) frequency range transmission, corresponding microwave frequency range communication, digital radar, single soldier satellite movement, communication terminals, military and civil multimode and multipath communication system terminals, wireless communication hand-hold terminals and other corresponding systems with strict requirements on volume, weight, property and reliability.

Description

technical field [0001] The invention relates to the communication field, in particular to a P-band triple-octave frequency micro-shaped directional coupler used in the communication field. Background technique [0002] Bluetooth technology is a short-distance wireless connection technology used to replace cables or wires used on portable or fixed electronic devices. For data and voice transmission. Since Nokia and other companies proposed Bluetooth technology in 1998, Bluetooth technology has been greatly developed and has become popular all over the world in just two years. According to statistics, by 2002, more than 2,000 enterprises were engaged in research and development of Bluetooth technology, and successively launched products such as Bluetooth chips, Bluetooth protocols, applications, and test equipment. Bluetooth technology includes not only a Bluetooth chip, but also a transceiver module. In addition to the cost factor, there are two technical problems in the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/075
Inventor 戴永胜肖圣磊宋志东王飞叶仲华李宝山王超宇姚友芳郭玉红周文衎张杰符光强陈少波
Owner NANJING UNIV OF SCI & TECH
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