Accession Number : ADA194981


Title :   Confirmation of Slow-Waves in a Crosstie Overlay Coplanar Waveguide and Its Application to Band-Reject Gratings and Reflectors.


Descriptive Note : Technical rept.,


Corporate Author : TEXAS UNIV AT AUSTIN DEPT OF ELECTRICAL AND COMPUTER ENGINEERING


Personal Author(s) : Wang, Te-Hui ; Itoh, Tatsuo


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA194981


Report Date : Mar 1988


Pagination or Media Count : 168


Abstract : The slow-wave propagation along a new crosstie overlay slow-wave coplanar waveguide has been investigated both theoretically and experimentally. A slow-wave factor observed agrees reasonably well with the theoretical prediction. This structure is used from construction of a frequency-selective distributed Bragg reflectors (DBR's) with a compact size. The effect of conductor loss is considered. A doubly-periodic band-reject grating has been created from the DBR's and the band-reject phenomenon was observed as predicted. To improve passband characteristics of the grating, a monolithic slow-wave Chebyshev reflector was designed and fabricated. Agreement between theory and preliminary experiment has been confirmed. Based on this theory, a new slow-wave reflector with improved characteristics is proposed and examined. A respectable slow-wave factor and a drastic reduction of conductor loss have been obtained.


Descriptors :   BRAGG ANGLE , DISTRIBUTION , FREQUENCY , FREQUENCY BANDS , MATHEMATICAL PREDICTION , OVERLAYS , PROPAGATION , REFLECTORS , SELECTION , SIZES(DIMENSIONS) , SLOW WAVE CIRCUITS , GRATINGS(SPECTRA) , BANDSTOP FILTERS , BRAGG ANGLE


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE