A UWB Filter with Multiple Notches

A technology of ultra-wideband filter and notch frequency, which is applied in the direction of waveguide devices, resonators, electrical components, etc., to achieve the effect of easy processing, easy integration, and compact structure

Inactive Publication Date: 2018-01-09
COMMUNICATION UNIVERSITY OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, ultra-wideband filters with notch characteristics can usually only obtain 1 to 3 notch frequencies. In an environment with complex electromagnetic spectrum and more interference, a multi-notch characteristic with more than 3 is required. UWB filter

Method used

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  • A UWB Filter with Multiple Notches
  • A UWB Filter with Multiple Notches
  • A UWB Filter with Multiple Notches

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Experimental program
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Embodiment 1

[0031] Embodiment 1: as figure 1 , figure 2 , as shown in Figure 3(a) and Figure 3(b), an ultra-wideband filter with multiple notch frequencies, such as figure 1 In the shown ultra-wideband filter with four notch characteristics, the thickness of the microstrip dielectric substrate 1 is 0.5 mm, and the dielectric constant is 3.48.

[0032] Such as figure 1 The shown seventh-order bandpass filter 2 includes: the width of the microstrip line adopted by the first input / output port 11 and the second input / output port 23 is 1mm, and the length is 10mm. The length of the first short-circuit stub 12 and the fourth short-circuit stub 21 is 6.7 mm, and the width is 0.54 mm. The length of the second short-circuit stub 15 and the third short-circuit stub 18 is 6.35mm, and the width is 1.05mm. The length of the first unit element 14 and the third unit element 20 is 12.9 mm, and the width is 1.02 mm. The second unit element 17 has a length of 13 mm and a width of 0.96 mm. The diamet...

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Abstract

An ultra-wideband filter with multiple notch frequencies belongs to the technical field of electric appliances. It consists of a microstrip dielectric substrate, a 7th-order bandpass filter, and eight arrow-shaped resonators; the thickness of the microstrip dielectric substrate is 0.5mm, and the dielectric constant is 3.48. The 7th-order bandpass filter is the first input / output The port is connected with the first unit element at the back, the first unit element is followed by the second unit element, the second unit element is followed by the third unit element, and the third unit element is connected with the second input / output port; the first short circuit The branch is connected between the first input / output port and the first unit element, the three form a T-shaped structure, and the first short-circuit branch is grounded through the first via hole. The invention can separate the ultra-wideband filter design from the notch characteristic design, and the introduction of the notch resonator does not require any changes to the structural parameters of the original filter, and basically does not affect the performance of the original filter.

Description

technical field [0001] The invention relates to an ultra-wideband filter with multiple notch frequencies, belonging to the technical field of electric appliances. Background technique [0002] Ultra-wideband (UWB) technology has become a research hotspot in the field of communication due to its simple system, fast data transmission speed, high security, low cost, and low power consumption. As an important device of this system, high-performance ultra-wideband bandpass filter has received more and more attention. The communication frequency range of the UWB system is 3.1GHz to 10.6GHz. Due to its wide frequency band, the frequency band overlaps with the operating frequency of some narrowband systems. For example, the frequency of the WiMAX system is 3.5GHz, and the frequency range of the WLAN system is 5.15-5.35GHz. GHz and 5.725-5.825GHz, the frequency of the satellite communication system is 8.0GHz. These narrowband signals are likely to interfere with UWB system communic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 郭庆新朴大志居继龙李增瑞
Owner COMMUNICATION UNIVERSITY OF CHINA
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