Title :
Broadband 90
Differential Phase Shifter Constructed Using a Pair of Multisection Radial Line Stubs
Author :
Yeung, Sai Ho ; Xue, Quan ; Man, Kim Fung
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The current paper proposes a broadband 90° differential phase shifter using a pair of multisection radial transmission-line (TL) stubs. The scattering parameters of the differential phase shifter are calculated based on the radial TL theory to evaluate the differential phase shifter´s performance. Global optimization is performed using the TL model followed by a local optimization based on a more accurate electromagnetic simulation. The measured operating bandwidth of the circuit is 101.5%, which is larger than many designs in the literature.
Keywords :
S-parameters; optimisation; phase shifters; transmission lines; broadband 90° differential phase shifter; electromagnetic simulation; global optimization; local optimization; multisection radial line stubs; multisection radial transmission line stubs; radial TL theory; scattering parameters; Bandwidth; Broadband communication; Insertion loss; Integrated circuit modeling; Optimization; Phase shifters; Transmission line matrix methods; Broadband; differential phase shifter; radial stub;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2012.2204899