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An inline waveguide‐to‐microstrip transition for wideband millimeter‐wave applications
Author(s) -
Li Cun Long,
Jin Cheng,
Ma Han Qing,
Shi Xiao Wei
Publication year - 2020
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.32199
Subject(s) - microstrip , return loss , wideband , extremely high frequency , insertion loss , waveguide , optics , planar , materials science , transmission line , transmission loss , optoelectronics , physics , telecommunications , engineering , computer science , antenna (radio) , computer graphics (images)
A low‐cost wide Ka‐band inline waveguide‐to‐microstrip transition is proposed, which facilities the integration of planar transmission lines with waveguide structures. By employing a circular patch above a wedge‐shaped cavity, the quasi‐TEM mode wave in the microstrip line can be transformed into the TE 10 mode wave in the rectangular waveguide. A transition prototype in a back‐to‐back configuration is manufactured and experimentally tested. Measured results show that the return loss is greater than 13 dB from 28 to 38 GHz and the insertion loss remains less than 0.4 dB for the proposed single‐side transition. With the features of wideband, compact structure and easy integration, the proposed transition can be applied in the low‐loss and high‐integration millimeter‐wave systems.