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Compact and miniaturized bandstop filter developed using slot spurline technique
Author(s) -
Shrestha Bhanu,
Kim NamYoung
Publication year - 2014
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.28260
Subject(s) - insertion loss , return loss , microwave , monolithic microwave integrated circuit , resonator , reflection loss , band stop filter , materials science , multi band device , filter (signal processing) , electronic engineering , optoelectronics , electrical engineering , engineering , telecommunications , low pass filter , antenna (radio) , cmos , amplifier
A compact and miniaturized bandstop filter (BSF) developed based on the slot spurline technique was designed and characterized. The reflection zero of the BSF was carefully controlled through optimized simulations. Two meandered lines were used to enhance the coupling effect and to control the frequency of the BSF. These double spiral slot lines were used to achieve the dual mode of operation as well as to optimize the insertion loss by adjusting the length of the slot lines. Therefore, the proposed BSF achieves a low insertion loss and wider band‐rejection characteristics. The operating frequency of the BSF is 10.5 GHz for X‐band applications, with a minimum insertion loss of less than −25 dB and a return loss below −1.2 dB based on measurement results. The results obtained for this resonator demonstrate the possibility of integrating the device into small structures via MMIC technology. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1029–1031, 2014