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A novel microstrip band‐pass filter based on hole coupling structure
Author(s) -
Yuan Yan,
Xu Jun,
Xu YanQing,
Zhang XiaoChuan
Publication year - 2011
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26373
Subject(s) - return loss , passband , insertion loss , band pass filter , microstrip , filter (signal processing) , waveguide filter , materials science , microwave , m derived filter , electronic engineering , planar , butterworth filter , optoelectronics , high pass filter , filter design , computer science , low pass filter , prototype filter , telecommunications , engineering , electrical engineering , computer graphics (images) , antenna (radio)
A novel C‐band hole‐coupled bandpass filter with metallized post (or via‐hole) arrays directly embedded in middle of the microstrip line is presented in this letter.The proposed filter removes via‐hole arrays embedded along waveguide section from the half‐mode substrate integrated waveguide filter, while the new concept simplifies the structure of previous filter. Simulated and experimental results show that the proposed filter of this paper has good performances of low insertion loss, return loss, and better rejection characteristics. The insertion loss of measured four‐pole filter is about 0.8 dB, and the return loss is better than −25 dB in the whole passband. Keeping the advantages of excellent performances, the proposed filter can be constructed more conveniently and is suitable for low‐cost planar circuit. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2811–2814, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26373