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Ultra-wideband filter with multiple notch frequencies

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 compact structure, easy integration, and easy processing

Inactive Publication Date: 2015-04-29
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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  • Ultra-wideband filter with multiple notch frequencies
  • Ultra-wideband filter with multiple notch frequencies
  • Ultra-wideband filter with multiple notch frequencies

Examples

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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

The invention discloses an ultra-wideband filter with multiple notch frequencies, and belongs to the technical field of electrical devices. The ultra-wideband filter is composed of a micro-strip dielectric base plate, a seven-order band-pass filter and eight arrow-shaped resonators, wherein the micro-strip dielectric base plate is 0.5-mm in thickness, and the dielectric constant is 3.48; a first input / output port of the seven-order band-pass filter is connected with a rear first unit element; the first unit element is connected with a second unit element; the second unit element is connected with a third unit element; the third unit element is connected with a second input / output port of the seven-order band-pass filter; a first short-circuited stub is connected between the first input / output port and the first unit element to form a T-shaped structure; the first short-circuited stub is in ground connection through a first via hole. According to the ultra-wideband filter, the ultra-wideband filter design can be separated from the notched characteristic design; notch resonators can be introduced without changing any structure parameters of the conventional filter, and the performance of the conventional filter is basically prevented from being influenced.

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 Applications(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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