Title :
Distributed and lumped-element realizations of wideband branch-line hybrids with arbitrary power division
Author :
Lin, Tsu-Wei ; Chiou, Yi-Chyun ; Kuo, Jen-Tsai
Author_Institution :
Dept. of Electr. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A two-section branch-line coupler with an arbitrary output power division is realized by lumped and distributed elements. Based on the transmission line theory, as well as the basic circuit theory, transcendental equations are derived and formulated to determine its circuit parameters. For circuit miniaturization, the transmission-line sections are replaced by either a lumped ¿-network and realized with lumped capacitors. Several design curves are provided for ease of circuit implementation. Two circuits with output power division ratios |¿| = 3dB are fabricated and measured.
Keywords :
capacitors; lumped parameter networks; transmission line theory; waveguide couplers; arbitrary output power division; circuit theory; distributed element; lumped capacitors; lumped element; lumped ¿-network; transcendental equations; transmission line theory; two-section branch-line coupler; wideband branch-line coupler; Decision support systems; Virtual reality; Wideband; Arbitrary power division; branch-line coupler; lumped element; microstrip circuit; transmission-line theory;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385260
