Title :
W-band microshield low-pass filters
Author :
Robertson, S.V. ; Katehi, L.P.B. ; Rebeiz, G.M.
Author_Institution :
NASA Center for Space Terahertz Technol., Michigan Univ., Ann Arbor, MI, USA
Abstract :
Experimental and theoretical results are presented for a planar W-Band low-pass filter. A stepped impedance implementation of a 7-section 0.5 dB equal ripple Chebyshev filter achieves an insertion loss of 1 dB in the passband and a 90 GHz cutoff frequency. The filter is fabricated in microshield line technology, a new type of planar transmission line based on coplanar waveguide supported by a thin dielectric membrane. The inadequacy of conventional quasi-static models is discussed, and a Finite-Difference Time-Domain (FDTD) analysis is applied to predict the filter performance.<>
Keywords :
MMIC; finite difference time-domain analysis; low-pass filters; microwave filters; 1 dB; 90 GHz; W-band; coplanar waveguide; cutoff frequency; equal ripple Chebyshev filter; filter performance; finite-difference time-domain analysis; insertion loss; microshield line technology; microshield low-pass filters; planar transmission line; quasi-static models; stepped impedance implementation; thin dielectric membrane; Chebyshev approximation; Coplanar waveguides; Cutoff frequency; Finite difference methods; Impedance; Insertion loss; Low pass filters; Passband; Planar transmission lines; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335500
