Broadband band-pass filter capable of loading three-branched coupling microstrip lines

A technology of band-pass filter and microstrip line, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problems of poor selectivity of pass-band signals, and achieve the effects of avoiding interference, less noise and high selectivity

Inactive Publication Date: 2017-11-24
X TRIP INFORMATION TECH CO LTD
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a broadband bandpass filter loaded with three-twig ...

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  • Broadband band-pass filter capable of loading three-branched coupling microstrip lines
  • Broadband band-pass filter capable of loading three-branched coupling microstrip lines
  • Broadband band-pass filter capable of loading three-branched coupling microstrip lines

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with specific examples. The following examples are explanations of the present invention, and the present invention is not limited to the following examples.

[0019] refer to Figures 1 to 2 as shown, figure 1 It is a structural schematic diagram of a preferred embodiment of a broadband bandpass filter loaded with three-twig coupled microstrip lines in the present invention; figure 2 It is a schematic circuit diagram of a preferred embodiment of a broadband bandpass filter loaded with three-stub coupled microstrip lines in the present invention.

[0020] In this embodiment, the broadband bandpass filter 1 loaded with three-stub coupled microstrip lines includes two first microstrip lines 101, two second microstrip lines 102, two The third microstrip line 103 , two fourth microstrip lines 104 , two fifth microstrip lines 105 , two sixth microstrip lines 106 , two seventh microstrip lines 1...

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Abstract

The invention provides a broadband band-pass filter capable of loading three-branched coupling microstrip lines. The broadband band-pass filter comprises two first microstrip lines, two second microstrip lines, two third microstrip lines, two fourth microstrip lines, two fifth microstrip lines, two sixth microstrip lines, two seventh microstrip lines and two signal transmission ends which are arranged on the surface of a dielectric plate, wherein the broadband band-pass filter is bilaterally symmetrical about a first central axis; the broadband band-pass filter is longitudinally symmetrical about a second central axis; the first central axis is the connecting line of middle points of an upper transverse frame and a lower transverse frame of the broadband band-pass filter; and the second central axis is the connecting line of middle points of an upper longitudinal frame and a lower longitudinal frame of the broadband band-pass filter. According to the broadband band-pass filter provided by the invention, high selectivity for band-pass signals can be realized, little noise is introduced, and interference for radio-frequency front end is avoided.

Description

technical field [0001] The invention relates to the technical field of microwave communication, in particular to a broadband bandpass filter loaded with three-twig coupled microstrip lines. Background technique [0002] As a very important device in the RF front-end, the filter can filter out out-of-band noise and improve the sensitivity of the circuit system. A microstrip filter is a device used to separate microwave signals of different frequencies. Its main function is to suppress unwanted signals so that they cannot pass through the filter and only allow the required signals to pass. In a microwave circuit system, the performance of the filter has a great influence on the performance index of the circuit system. Generally speaking, the selectivity performance of the filter to the passband signal is an important influencing index, but the selectivity of the existing filter to the passband signal is poor, which affects the performance of the entire communication system. ...

Claims

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Application Information

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IPC IPC(8): H01P1/203
CPCH01P1/20354
Inventor 曲美君邓力李书芳张贯京葛新科张红治
Owner X TRIP INFORMATION TECH CO LTD
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