Title :
Design and study of enhanced wideband transition between coplanar waveguide and broadside coupled stripline
Author :
Wen-Jun Lu ; Heng Tong ; Ya-Ming Bo ; Hong-Bo Zhu
Author_Institution :
Jiangsu Key Lab. of Wireless Commun., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
Enhanced wideband transition between coplanar waveguide (CPW) and broadside coupled stripline (BCS) with arbitrary characteristic impedance ratio is developed on a basis of an improved tightly coupling, via-hole-free structure. The E-field of CPW gradually changes to that of BCS within a wide bandwidth with ratio up to 10.4:1. Parametric studies of the transition are carried out and four different back-to-back prototypes are simulated, fabricated and measured. It is shown that maximum operation bandwidth from 1.16 to 12.01 GHz for return loss higher than 10 dB and average insertion loss of 1.41 dB can be obtained.
Keywords :
UHF circuits; coplanar waveguides; microwave circuits; strip lines; BCS; CPW; E-field; arbitrary characteristic impedance ratio; average insertion loss; bandwidth 1.61 GHz to 12.01 GHz; broadside coupled stripline; coplanar waveguide; loss 1.41 dB; maximum operation bandwidth; return loss; via-hole-free structure; wideband transition enhancement;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2012.0506
