Title :
Novel transition between different configurations of planar transmission lines
Author :
Safwat, Amr M E ; Zaki, Kawthar A. ; Johnson, William ; Lee, Chi H.
Author_Institution :
Cascade Microtech Inc., Beaverton, OR, USA
fDate :
4/1/2002 12:00:00 AM
Abstract :
New designs of coplanar waveguide (CPW)-microstrip, CPW-stripline, conductor backed CPW (CBCPW)-microstrip, and CBCPW-stripline transitions are presented. Simulation using the high frequency structures simulator (HFSS) shows that the return loss of the CPW-microstrip transition is less than -25 dB up to 11 GHz. Similarly is the CPW-stripline transition. In the case of two back to back CBCPW-stripline transitions, the return loss is less than -22 dB up to 9 GHz. Experimentally, the S/sub 11/ of two back to back CBCPW-microstrip transitions on an alumina substrate is less than -15 dB up to 25 GHz.
Keywords :
alumina; coplanar waveguides; losses; microstrip transitions; simulation; strip line transitions; waveguide transitions; -15 to -25 dB; 9 to 25 GHz; Al/sub 2/O/sub 3/; CPW-microstrip transitions; CPW-stripline transitions; HFSS simulation; alumina substrate; conductor backed CPW-microstrip transitions; conductor backed CPW-stripline transitions; coplanar waveguide; high frequency structures simulator; planar transmission lines transitions; return loss; Conductors; Coplanar waveguides; Dielectric substrates; Frequency; Microstrip; Planar transmission lines; Planar waveguides; Stripline; Surface impedance; Waveguide transitions;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/7260.993290
