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Powder divider integrating a dual-frequency bandpass filter

A power divider, dual-band pass technology, applied in waveguide-type devices, electrical components, connecting devices, etc., to achieve the effects of being conducive to integration, miniaturization, low insertion loss, and size reduction

Inactive Publication Date: 2012-04-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has not been a device that integrates a real filter into a power divider, especially a power divider that integrates a filter function with dual-frequency bandpass characteristics. In order to fill this gap, the present invention proposes a new Power divider with integrated dual-band bandpass filter

Method used

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  • Powder divider integrating a dual-frequency bandpass filter
  • Powder divider integrating a dual-frequency bandpass filter
  • Powder divider integrating a dual-frequency bandpass filter

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Embodiment

[0028] The structure of the power divider integrating the dual-band bandpass filter is as figure 1 As shown, the relevant dimensions are as follows figure 2 shown. The thickness of the dielectric substrate is 0.63mm, and the relative permittivity is 6.15. The isolation element connected between the open ends of the band-pass filter loaded in the center of the two branch lines adopts a 400-ohm resistor to enhance isolation. Such as figure 2 As shown, the size parameters of each microstrip line of the filter are as follows: the electrical length of the third microstrip line 3 θ 1 is 71°, the electrical length of the coupling interval between the third microstrip line 3 and the seventh microstrip line 7 θ 2 is 42°, the electrical length of the interval between the open end of the third microstrip line 3 and the sixth strip line 6 θ 3 is 28°, the electrical length of the sixth microstrip line 6 θ 4 is 41°, the electrical length of the fourth microstrip line 4 θ...

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Abstract

The invention discloses a powder divider integrating a dual-frequency bandpass filter, which comprises an upper-layer micro-strip structure, an isolating component, an intermediate layer dielectric substrate and a lower-layer grounding metal plate. The powder divider integrating the dual-frequency bandpass filter comprises two branch line central loading bandpass filters and the isolating component connected between the branch line central loading bandpass filters. The input impedance and the output impedance of the powder divider integrating the dual-frequency bandpass filter are identical; and the input impedance and the output impedance of each branch line central loading bandpass filter are several times those of the powder divider integrating the dual-frequency bandpass filter. Each branch line central loading bandpass filter consists of two open-circuit branch line loading resonators with identical structures. The isolating component can be a resistor, a capacitor or an inductor. The powder divider can be used in various radio-frequency front-end systems, simultaneously has the functions of power division and power selection and facilitates the integration and the miniaturization of devices.

Description

technical field [0001] The invention relates to a power divider with a filtering function, in particular to a power divider integrated with a dual-frequency bandpass filter, which can be applied to a radio frequency front-end circuit with a filter function. Background technique [0002] Power splitters are a fundamental part of microwave circuits and are used in almost all antenna arrays and balanced circuits because of their ability to separate and combine signals. Bandpass filters are another indispensable device in wireless communication systems because they can separate out the desired frequency bands. Both devices, power dividers and bandpass filters, co-exist in many microwave systems. [0003] In the past few decades, there has been a lot of research on power dividers. The focus of the research is widening the frequency band, reducing the area, dual frequency response and harmonic suppression. [0004] On the other hand, bandpass filter is also an important researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/16
Inventor 章秀银胡斌杰
Owner SOUTH CHINA UNIV OF TECH
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