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Ultra-wideband filter employing parallel resonator and having band-stop characteristic

An ultra-wideband filter and parallel resonator technology, which is applied in the field of filters in the field of communication technology, can solve the problems of large size, narrow frequency band, and insufficient roll-off at the edge of the passband, and achieve simplified design and analysis and high practicability , design simple effects

Inactive Publication Date: 2010-06-16
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0010] The purpose of the present invention is to provide a flat and compact ultra-wideband filter with the function of suppressing WLAN signals, so as to solve the problem that the existing microstrip filter has narrow frequency band, large size, and insufficient roll-off at the edge of the passband.

Method used

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  • Ultra-wideband filter employing parallel resonator and having band-stop characteristic
  • Ultra-wideband filter employing parallel resonator and having band-stop characteristic
  • Ultra-wideband filter employing parallel resonator and having band-stop characteristic

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Embodiment Construction

[0026] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but the scope of protection required by the present invention is not limited to the following embodiments.

[0027] Such as figure 1As shown, the UWB filter with band-stop characteristics using parallel resonators is implemented in the form of a microstrip circuit. The entire circuit structure is divided into three layers: the upper microstrip structure, the middle dielectric substrate and the bottom metal floor, and the upper microstrip The structure and the underlying metal floor are attached to the dielectric substrate, and the microstrip structure includes a first input\output port, a second input\output port, a first feed network, a second feed network, an open-circuit T-type resonator, and a short-circuit T-type resonator. Among them, the first input / output port 1, the first feeder line 2, the second feeder line 3, the third feeder line 4, ...

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Abstract

The invention discloses an ultra-wideband filter employing parallel resonators and having a band-stop characteristic and a function of restraining WLAN (Wireless Local Area Network) interference signals. A first feed network and a second feed network of the ultra-wideband filter have the identical structure and are arranged symmetrically relative to a gap between the two feed networks, a first transmission line and a fourth transmission line are respectively inserted into two ends of the gap. A metallized through-hole unit, the first transmission line and a second transmission line form a short circuit T-shaped resonator. A third transmission line and the fourth transmission line form an open circuit T-shaped resonator. The resonant frequency of the short circuit T-shaped resonator is at the low side of the frequency range of 3.1GHz to 10.6GHz, and the resonant frequency of the open circuit T-shaped resonator is at the high side of the frequency range of 3.1GHz to 10.6GHz. The ultra-wideband filter can not only couple signals within the pass band frequency range to the resonator, but also can be used to generate stop band at appointed frequency points. The ultra-wideband filter has the advantages of small size, good frequency selectivity, easy process and low cost.

Description

technical field [0001] The invention relates to a filter in the technical field of communication, in particular to a compact planar ultra-wideband filter with a wireless local area network (WLAN) interference signal suppression function. Background technique [0002] With the development of high-speed wireless data access technology, future wireless communication systems are required to have greater data throughput than existing systems. At present, the wireless access technologies mainly used include bluetooth, infrared and ultra-wideband. Due to the constraints of low transmission rate and small bandwidth, Bluetooth and infrared technology are limited in their application. Ultra-Wideband (UWB) is a wireless technology that transmits data at high speeds over short distances at very low power, while being able to penetrate obstacles such as walls. Therefore, as an effective short-distance wireless access technology, UWB technology has been paid more and more attention. Ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203
Inventor 胡斌杰宋蕾蕾章秀银
Owner SOUTH CHINA UNIV OF TECH
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