Design of Compact Multi-Channel Diplexer Using Defected Microstrip Structure
Publish place: Journal of Communication Engineering، Vol: 8، Issue: 1
Publish Year: 1398
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCESH-8-1_011
تاریخ نمایه سازی: 15 مهر 1398
Abstract:
In this paper, two compact quad-channel and six-channel diplexer are designed and fabricated using defected microstrip structure (DMS). This structure is designed for the desired frequency based on the literature reviews. The proposed configuration is composed of a conventional T-junction divider with two pairs of open bended stubs and dual/tri-band filters. In designing dual band filters, a loop resonator loaded with two stepped-impedance resonator and defected microstrip structure. In addition, by adding a pair of open stubs, tri-band responses easily achieved without increasing the circuit size. The operating mechanism in resonance frequencies by surface current density is obtained. As a result, the multi-channel diplexer occupies a compact size of 0.13λg by 0.13λg. The measured results are fully in agreement with the simulated predictions indicating that an isolation between channels is more than 29 dB.
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Authors
behnoush ghafari tirabadi
Electrical & Computer Engineering Faculty, Semnan University, semnan, Iran
Majid Afsahi
Semnan University