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Researches of Microwave Filters Based on Substrate Integrated Waveguide

Author: LiuZuo
Tutor: ZhaoYongJiu
School: Xi'an University of Electronic Science and Technology
Course: Measuring Technology and Instruments
Keywords: SIW Half mode SIW Broadband filter
CLC: TN713
Type: Master's thesis
Year: 2010
Downloads: 365
Quote: 0
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Abstract


The rapid development of radar technology, wireless communication technology put forward higher requirements for microwave and millimeter wave circuits and systems. Various military and civilian microwave and millimeter wave system is in urgent need of small, lightweight, low-cost and high reliability. Microwave filter is a key device in the microwave and millimeter wave RF system, the use of low insertion loss, high selectivity, high-performance filter can greatly improve the performance of the system. SIW (Substrate Integrated Waveguide; SIW) is the one that appeared in recent years in the field of microwave and millimeter wave integrated new media substrate guided wave structures, it has a small insertion loss, low radiation, high power capacity advantages. Substrate integrated waveguide transmission characteristics of the fill media metal rectangular waveguide similar. Therefore, it is possible to achieve the structure of a conventional rectangular waveguide basic can also be integrated with the substrate and waveguides. SIW can use the standard printed circuit board (PCB) technology, a low temperature co-fired ceramic (LTCC) process and the film (Thin-Film) process to process. In order to further reduce the size and improve the level of integration, the the the Southeast University professor Hongwei research team put forward an improved structure - half mode substrate integrated the waveguide (Half Mode Substrate Integrated Waveguide; HMSIW). New structure in integrated the excellent performance of the waveguide, while maintaining the substrate, the size is reduced by about half. The main work in the following areas: 1 (half mode) substrate integrated waveguide with traditional rectangular waveguide and conversion relationship given (Semimodules) substrate integrated waveguide - microstrip line transfer connector design method so that the substrate integrated waveguide can be easily connected with the test (mold half). 2, the traditional filter design methods used in SIW dichotomy-based FORTRAN program to synthesize various size, physical test data for the K-band metal through-hole and the filter media column structure, writing and The consistency of the simulation results verify the correctness of the design, to improve the efficiency and accuracy of the design. In addition, the article also designed SIW E Mask Sheet and perceptual window filter. 3, in order to further reduce the substrate integrated waveguide devices, volume, design and simulation of an X-band half-mode substrate integrated waveguide metal through-hole filter, the feasibility of the design can be seen from the S-parameter simulation. Subsequently, using the half-mode substrate integrated waveguide high-pass characteristic, with a the microstrip line low-pass filter cascade, in order to further reduce the volume will microstrip transition partially embedded half-mode substrate integrated waveguide has been a pass band range of 5GHz ~ 10.7GHz (relative bandwidth is 72.6%) of the wideband bandpass filter. The filter in the pass band, return loss better than-15dB, insertion loss is better than-0.5dB. In order to validate design correctness of its processing physical and Agilent vector network analyzer test, the test results and simulation results are consistent.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Filtering techniques,the filter
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