Four-band microstrip band-pass filter with notch characteristics and design method thereof

A notch characteristic, four-band technology, applied in the field of four-band microstrip bandpass filter, can solve the problem of not being able to adapt to the requirements of 5G technology

Pending Publication Date: 2019-12-20
HEFEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

my country has made important progress in the research and development of 5G technology. The Ministry of Industry and Information Technology has officially issued 5G mobile communication medium and low frequency band experimental frequencies to China Mobile, China Telecom, China Unicom and other three major operators, respectively: 2515MHz ~ 2675M...

Method used

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  • Four-band microstrip band-pass filter with notch characteristics and design method thereof
  • Four-band microstrip band-pass filter with notch characteristics and design method thereof
  • Four-band microstrip band-pass filter with notch characteristics and design method thereof

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Embodiment 1

[0040] Such as figure 1 , 2 As shown, a four-band microstrip bandpass filter with notch characteristics, it includes a circuit board containing a conductor strip 1, a dielectric substrate 2 and a ground plate 3 arranged in sequence, and the circuit board can be printed circuit board;

[0041] The circuit board is provided with a short-circuit perforation 4 through the conductor strip 1, the dielectric substrate 2 and the ground plate 3, so that the conductor strip 1 passes through the dielectric substrate 2 and is connected to the ground plate 3; wherein , the conductor strip 1 comprises:

[0042] Input port 5 and output port 6;

[0043] The feeder 7 between the input port 5 and the output port 6 is connected by a stepped feeding method, and the short-circuit perforation 4 passes through the feeder 7; specifically, the short-circuit perforation 4 connects the feeder 7 separated into two sections;

[0044] Two first stepped impedance resonators connected to the upper end o...

Embodiment 2

[0068] A method for designing a four-band microstrip bandpass filter with notch characteristics as described in Embodiment 1, the steps of the method include:

[0069] S1: On the basis that both the input port 5 and the output port 6 are connected to the feeder 7 in a stepped feeding manner and that the input port 5 and the output port 6 share the short-circuit perforation 4, a pair of them are arranged in parallel on the dielectric substrate 2 A first ladder impedance resonator, a pair of second ladder impedance resonators and a pair of F-type open-circuit stubs;

[0070] S2: Adjust the size and position of the first ladder impedance resonator and the second ladder impedance resonator to adjust the working range of the highest frequency band and the lowest frequency band in the four frequency bands; adjust the size and position of the F-type open circuit branch to adjust the four frequency bands The operating range and notch point frequency of the other two frequency bands ar...

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Abstract

The invention discloses a four-band microstrip band-pass filter with notch characteristics and a design method thereof. The four-band microstrip band-pass filter with notch characteristics includes aconductor band, a dielectric substrate, and a circuit board of a grounding board. The circuit board is provided with a short-hole perforation. The conductor band includes an input port, an output port, a feeder line, two first stepped impedance resonators, two second stepped impedance resonators, and two F-type open-circuit branches, wherein the feeder line is connected between the input port andthe output port; the two first stepped impedance resonators are connected to the upper end portion of the feeder line; the two second stepped impedance resonators are connected to the lower end portion of the feeder line; the two F-type open-circuit branches are connected to the upper end portion of the feeder line; and the first stepped impedance resonator is located between the two F-type open-circuit branches. The four-band microstrip band-pass filter has notch characteristics, can realize band-pass filtering of four frequency bands simultaneously, and has a simple structure, small size, high integration, excellent performance, and good compatibility.

Description

technical field [0001] The invention relates to a four-band microstrip bandpass filter with notch characteristics and a design method thereof. Background technique [0002] In a mobile communication system, a filter is a radio frequency front-end device used to select a working frequency band and filter out out-of-band interference. A filter is a two-port network that provides signal transmission in the passband frequency and attenuation in the stopband to control the frequency response in a communication system. With the rapid development of modern mobile communications, filters are gradually developing toward miniaturization, high performance, low cost, and multi-band. Microstrip bandpass filters have attracted extensive attention from researchers in the industry because they are easy to meet the above requirements. And be applied to various fields of the mobile communication industry. [0003] At present, the fifth generation mobile communication (5G), as one of the hot...

Claims

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Application Information

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IPC IPC(8): H01P1/203H01P11/00
CPCH01P1/203H01P11/007
Inventor 孔勐程彬彬陈明生杨周瑞张忠祥张量柴豆豆
Owner HEFEI NORMAL UNIV
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