Inline waveguide to suspended stripline transition with DC/IF return path.

ABSTRACT This article presents an inline waveguide to suspended stripline (SSL) transition. The transition adopts unilateral finline to transform the input waveguide TE10 mode to SSL Quasi-TEM mode. The module of the transition is split into two halves along the center of the waveguide E-plane. The substrate is flip mounted on the grooves of the lower half of the module. The finline is extended to the mounting groove and bonded to the waveguide channel. The waveguide feed direction is inline with the SSL wave transmission direction, and DC/IF return path is also provided by the finline. A G-band prototype is designed and fabricated. The measured results show that the insertion loss is 1.3 to 2 dB at frequencies from 140 to 213 GHz, with return loss more than 10 dB. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:729-732, 2017 [ABSTRACT FROM AUTHOR]