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A wideband, sharp roll‐off U‐band diplexer in suspended stripline technology
Author(s) -
Miri SeyedMilad,
MohammadpourAghdam Karim,
Miri SeyedOmidreza
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21934
Subject(s) - diplexer , wideband , stripline , stopband , passband , insertion loss , frequency band , cutoff frequency , microstrip , extremely high frequency , acoustics , band pass filter , materials science , physics , electrical engineering , electronic engineering , telecommunications , optics , bandwidth (computing) , engineering
This article presents a low‐loss, sharp roll‐off, and wideband millimeter‐wave contiguous diplexer implemented on 0.127‐mm‐thick TLY5 dielectric material to separate U‐band frequency range into two jointed frequency ranges of 40‐50 and 50‐60 GHz using two low‐pass and high‐pass filter channels. In order to integrate the diplexer in front end of a wideband millimeter‐wave down‐converter and evaluate the frequency response, the proposed diplexer is supported by three add‐on waveguide to suspended stripline transitions. The final design of diplexer consisting of a low‐pass filter with a cutoff frequency of 50 GHz, a pseudo‐high‐pass filter with crossover at 50 GHz, and a T‐junction is analyzed and optimized together with a three‐dimensional full‐wave simulator. The realized diplexer features a voltage standing wave ratio of 2.5:1 across the entire operation frequency band of 40‐60 GHz, low passband insertion loss of less than 2 dB in both channels, stopband rejection higher than 45 dB, and compact size with dimensions of 27 × 13 mm 2 due to its intelligent and guided design and technology selection.