Title :
A Waveguide to Unenclosed Coplanar Waveguide Transition
Author :
Reck, Theodore ; Weikle, Robert M. ; Barker, N. Scott
Author_Institution :
Charles L. Brown Dept. of Electr. Eng., Univ. of Virginia, Charlottesville, VA, USA
Abstract :
A transition from rectangular waveguide to unenclosed coplanar waveguide (CPW) is designed and tested at W -band. Full-wave finite-element analysis is applied to the design and optimization trends are shown for the critical parameters. A stepped-impedance filter suppresses a parasitic mode, which is generated as the circuit emerges from the waveguide block, and a rejection of -20 dB is achieved. A back-to-back structure is used to characterize the performance of the transition and an insertion loss of 1.6 dB from 75 to 100 GHz is measured. Removing line losses, a single transition insertion loss of 0.46 dB is obtained.
Keywords :
coplanar waveguides; finite element analysis; rectangular waveguides; waveguide filters; waveguide transitions; W -band; back-to-back structure; coplanar waveguide transition; full-wave finite element analysis; rectangular waveguide; stepped-impedance filter; transition insertion loss; unenclosed coplanar waveguide; waveguide block; Circuit testing; Coplanar waveguides; Couplings; Design optimization; Electromagnetic waveguides; Filters; Finite element methods; Impedance; Insertion loss; Loss measurement; Performance loss; Probes; Rectangular waveguides; Substrates; Waveguide transitions; $W$-band; Coplanar waveguide (CPW); rectangular wave guides; transitions; waveguide filters; waveguide transitions;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2010.2058550
