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Small ultra wideband microstrip band-pass filter

An ultra-wideband and filter technology, which is applied in the field of small ultra-wideband microstrip bandpass filter structures, can solve the problems of difficult adjustment of the filter passband bandwidth, large overall filter volume, and high processing accuracy requirements, and achieves a simple structure design. Easy operation, compact structure, low insertion loss effect

Inactive Publication Date: 2011-04-06
NANJING UNIV OF SCI & TECH +1
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Problems solved by technology

The traditional ultra-wideband (UWB) filter structure generally adopts strongly coupled interdigitated coupling lines or a series connection of a low-pass filter and a high-pass filter structure. The disadvantages of this type of structure are: (1) high processing accuracy and difficult application; (2) The overall volume of the filter is large; (3) The passband bandwidth of the filter is difficult to adjust, and the comprehensive characteristics are poor

Method used

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  • Small ultra wideband microstrip band-pass filter
  • Small ultra wideband microstrip band-pass filter
  • Small ultra wideband microstrip band-pass filter

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] combine Figures 1 to 4 , the ultra-wideband microstrip bandpass filter structure of the present invention includes a dielectric substrate 1, a lower metal surface 2, an upper open coupling line 3, an upper short coupling line 4, a metal grounding via 5, and two upper microstrips of different lengths Transmission lines 6 and 7, 50-ohm microstrip lines 8 and 9 at the left and right ends of the upper layer; square groove lines 11 are etched on the metal surface 2 of the lower layer, and the square groove lines 11 are used at the corners of two transmission lines 6 and 7 of different lengths on the upper layer chamfer 10 with the same width. The length of upper layer open coupling line 3 corresponds to 1 / 2 wavelength of the center frequency of the passband of this ultra-wideband (UWB) microstrip bandpass filter, and the length of upper layer short-circui...

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Abstract

The invention relates to a structure of a small ultra wideband (UWB) microstrip band-pass filter. The small UWB microstrip band-pass filter comprises a medium substrate, upper microstrip coupling lines, an upper microstrip transmission line, a lower metal surface, two square grooves etched on the lower metal surface and two metal grounding through holes. The bandwidth of the structure of the small UWB microstrip band-pass filter and the inhibition of second harmonic can be conveniently controlled by regulating the coupling strength of the upper coupling lines and the electrical length of the upper microstrip transmission line. Two groove structures etched on the lower metal surface can be used for improving the coupling strength among the upper microstrip coupling lines. The small UWB microstrip band-pass filter has a simple structure design and small volume, is convenient to process, has adjustable bandwidth and high electrical performance and has the obvious advantage of being easily integrated with other plane microwave millimeter wave circuits.

Description

technical field [0001] The invention belongs to a band-pass filter in microstrip circuit design, in particular to a novel small ultra-wideband microstrip band-pass filter structure containing a floor etching structure. Background technique [0002] With the rapid development of communication technology, people have higher and higher requirements for information transmission system. In recent years, with the improvement of microelectronic device technology and technology, UWB (Ultra-wideband, ultra-wideband) technology has begun to be used in the civilian field, and ultra-wideband (UWB) filter technology has become a research hotspot in the field of communication. The traditional ultra-wideband (UWB) filter structure generally adopts strongly coupled interdigitated coupling lines or a series connection of a low-pass filter and a high-pass filter structure. The disadvantages of this type of structure are: (1) high processing accuracy and difficult application; (2) The overall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/212
Inventor 车文荃冯文杰董士伟顾黎明邓宽史苏阳
Owner NANJING UNIV OF SCI & TECH
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