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Equal Power Divider with Integrated Bandpass Filter

A technology of power divider and integrated strip, which is applied to waveguide-type devices, electrical components, connecting devices, etc., can solve the problem that the filtering function needs to be improved, and achieve the effect of low insertion loss

Active Publication Date: 2014-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, mentioned in the document X. Y. Tang, and K. Mouthaan, "Filter Integrated Wilkinson Power Dividers," Microwave and Optical Technology Letters, vol. 52, no. 12, pp. 2830-2833, Dec, 2010., Π- The Π-type transmission line can be integrated into the power divider, however, only the Π-type transmission line is used in the article, and its filtering function needs to be improved

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  • Equal Power Divider with Integrated Bandpass Filter
  • Equal Power Divider with Integrated Bandpass Filter
  • Equal Power Divider with Integrated Bandpass Filter

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Embodiment Construction

[0027] The structure of the divided power divider with integrated band-pass filter function is as follows: figure 1 As shown, the relevant dimensions are as follows image 3 Shown. The thickness of the dielectric substrate is 0.81mm, and the relative dielectric constant is 3.38. The isolation element 18 connected between the single band-pass filter circuits uses a 5.1k ohm resistor to enhance isolation. Such as image 3 As shown, the length of each resonator of the single band-pass filter circuit L Is the resonant frequency of the single band pass filter circuit f Corresponding wavelength λ A quarter of L is the sum of L1, L2, L3 and L4. according to image 3 Design the power divider to obtain the required input and output impedance characteristics, in-band transmission characteristics and out-of-band attenuation characteristics.

[0028] Figure 4a It is the simulation result of the transmission characteristics of an equally divided power divider with integrated band-pass filt...

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Abstract

The invention discloses an equal-divided power divider with integrated band-pass filtering function, which comprises an upper-layer microstrip structure, an isolation element, a middle-layer dielectric substrate and a lower-layer grounding metal plate. Each equal-division power divider integrated with band-pass filter function includes two single-frequency band-pass filter circuits and an isolation element connected between the two single-frequency band-pass filter circuits. The input impedance and output impedance of the equalized power divider with integrated band-pass filter function are the same, and the input and output impedance of each single-frequency band-pass filter circuit can be adjusted by changing the coupling strength and port position between resonators for power distribution and Make a match. Each single-frequency bandpass filter circuit consists of three quarter-wavelength resonator couplings. The invention can be used in various radio frequency front-end systems, has the functions of power distribution and frequency selection, and is smaller in volume than cascaded filter circuits and power dividers, and is beneficial to the integration and miniaturization of devices.

Description

technical field [0001] The invention relates to a power divider with filter function, in particular to an equal-divided power divider with integrated band-pass filter function applicable to radio frequency front-end circuits. Background technique [0002] Power splitters are a fundamental part of microwave circuits and are used in many antenna arrays and balanced circuits because of their ability to separate and combine signals. The band-pass filter circuit is another indispensable part in the wireless communication system, because it can separate the required frequency band. Both elements are present 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. At the same time, band-pass filter circuit is also an important research field in passive circuit design. Single-passband and multi-pass...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/16
Inventor 章秀银李聪余枫林王凯旭胡斌杰
Owner SOUTH CHINA UNIV OF TECH