Design of a Ka-band Filter with Narrow Pass Band Based on Substrate Integrated Waveguide
GE Junxiang LI Hao YANG Xianzhi WANG Jie
(College of Electronic and Information Engineering, Nanjing University of Information Science &Technology, Nanjing 210044, China)
(Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing 210044, China)
In view of the difficulty of implementing the narrow band and integration simultaneously for the traditional Ka-band filter, a Ka-band filter with narrow pass band is designed based on Substrate Integrated Waveguide (SIW). The filter adopts the structure with dual-mode circle cavity and ellipse cavity cascaded, which achieves the advantages of high frequency selectivity due to the transmission zeros both in upper and lower sideband. The measured results show that the filter has a relative bandwidth of 2.85%, insertion loss of 3.4 dB, and return loss is more than 15 dB at a center frequency 35 GHz, and the results are in good agreement with the simulation results. The measured results verify that the filter has great application value in millimeter system.
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GE Junxiang, LI Hao, YANG Xianzhi, WANG Jie. Design of a Ka-band Filter with Narrow Pass Band Based on Substrate Integrated Waveguide. JEIT, 2017, 39(5): 1245-1249.
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