Title :
Broadband Fixed Phase Shifters
Author_Institution :
Sch. of ITEE, Univ. of Queensland, Brisbane, QLD, Australia
Abstract :
A method to design planar and compact phase shifters with broadband characteristics is presented. It utilizes broadside-coupled microstrip-coplanar waveguide, and thus the proposed devices can be fabricated using the simple and cheap double-side printed circuit boards. The method is used to design 60° and 90° phase shifters. The simulated and measured results show that the developed phase shifters achieve 3 to 11 GHz bandwidth with low phase instability (±2°), very low insertion loss (0.4 dB), high return loss (15 dB), and a compact size (1.5 cm × 2 cm).
Keywords :
coplanar transmission lines; coplanar waveguides; coupled transmission lines; microstrip lines; microwave phase shifters; broadband characteristics; broadband fixed phase shifters; broadside-coupled microstrip-coplanar waveguide; compact phase shifter; double-side printed circuit boards; insertion loss; phase instability; planar phase shifter; return loss; Broadband antennas; Broadband communication; Capacitance; Couplings; Microstrip; Performance evaluation; Phase shifters; Coupled transmission lines; electromagnetic coupling; phase Shifters; planar transmission lines;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2079320
