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Slot-line dual-band bandpass filter

A band-pass filter and dual-band technology, which is applied in the field of microwave communication equipment, can solve the problems of large circuit area and large occupation, and achieve the effect of improving power carrying capacity, improving stop-band characteristics, and realizing circuit miniaturization

Inactive Publication Date: 2013-08-07
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned applications are all based on the design method of a single-band filter. At the same time, an external impedance matching network will result in a larger circuit area and greater entry and exit loss, as well as the difficulty of design.

Method used

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  • Slot-line dual-band bandpass filter
  • Slot-line dual-band bandpass filter
  • Slot-line dual-band bandpass filter

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Embodiment Construction

[0013] In order to make the technical means, innovative features and objectives of the present invention easy to understand, the present invention will be further described below in conjunction with specific examples.

[0014] The invention provides a slot-line dual-band band-pass filter, which includes a microwave dielectric board substrate, an upper-layer microstrip transmission line and a lower-layer slot-line resonator. The upper microstrip transmission line and the lower slot line resonator are respectively etched on the upper surface and the lower surface of the microwave dielectric substrate. Through the design of the upper and lower layers, the space of the lower layer of the microwave dielectric substrate is fully utilized, and the circuit size is significantly reduced. structure size, and the spiral split ring groove line resonator in the lower layer adopts a spiral structure design, which further reduces the structure size of the circuit.

[0015] exist figure 1 Am...

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Abstract

A slot-line dual-band bandpass filter comprises a microwave medium dielectric slab substrate, upper microstrip transmission lines and lower slot-line resonators. A third spiral slot-line stub and a first spiral slot-line stub are loaded to a first open ring slot-line resonator to form an open ring slot-line resonator with the loaded spiral slot-line stub. A fourth spiral slot-line stub and a third spiral slot-line stub are loaded to a second open ring slot-line resonator to form an open ring slot-line resonator with the loaded spiral slot-line stub. The two open ring slot-line resonators with the loaded spiral slot-line stub are coupled to input and output feeders by means of clearance coupling and vertical coupling. The slot-line dual-band bandpass filter allows for independent control of central frequency of two bands and circuit miniaturization; power carrying capacity of the microwave filter is improved; microwave filter bandwidth control is realized; stop-band characteristic of the filter is improved effectively; the slot-line dual-band bandpass filter is compact in design and easy to integrate.

Description

technical field [0001] The invention belongs to the technical field of microwave communication equipment and relates to a band-pass filter. Background technique [0002] In order to meet people's increasingly diversified needs for communication, realizing multi-band communication is a research hotspot in modern microwave communication systems. As a key device in the communication system, the multi-frequency design of the microwave filter has become a key technology. Usually, a multi-frequency microwave filter is realized by inserting a stop band in a wide pass band, which can be realized by connecting a wide band band pass filter and a narrow band band stop filter in series; or by two different band pass filters In order to achieve the impedance matching of the input and output terminals, it is usually necessary to insert an impedance matching network between the port and the filter. However, the above-mentioned applications are all based on the single-band filter design m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 刘海文许文渊文品任宝平王言
Owner EAST CHINA JIAOTONG UNIVERSITY
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