Title :
Design and characterization of elevated CPW and thin film microstrip structures for millimeter-wave applications
Author :
Hettak, K. ; Stubbs, M.G. ; Elgaid, K. ; Thayne, I.G.
Author_Institution :
Commun. Res. Centre Canada, Ottawa, Ont., Canada
Abstract :
A new family of low loss series/shunt matching stub structures, based on a CPW/thin film microstrip combination using an MMIC airbridge approach to realize an elevated transmission line, is presented. This airbridge approach to elevate the CPW centre conductor and thin-film microstrip line was developed to achieve low losses in the millimeter-wave frequency band with a wide impedance range. By elevating lines from the substrate, the dielectric loss can be reduced. We achieve high impedance with a lower attenuation level than conventional CPW and low impedance with an air-substrate thin-film microstrip. Experimental results are presented in support of the novel structures.
Keywords :
MMIC; coplanar waveguides; dielectric losses; microstrip circuits; microstrip lines; millimetre wave integrated circuits; thin film devices; transmission lines; CPW centre conductor; MMIC airbridge approach; air-substrate thin-film microstrip; dielectric loss reduction; elevated transmission line; millimeter-wave frequency band; thin film microstrip structures; thin-film microstrip lines; Coplanar waveguides; Dielectric losses; Dielectric substrates; Dielectric thin films; Impedance; MMICs; Microstrip; Propagation losses; Transistors; Transmission lines;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1610067
