Title :
Design of Coupled Three-Line Impedance Transformers
Author :
Huy Thong Nguyen ; Kian Sen Ang ; Geok Ing Ng
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A novel structure for impedance transformer employing symmetrical coupled three-line is presented in this letter. This new transformer is approximately the same size as the conventional quarter wavelength, achieves three reflection zeros within its band-pass, and can perform high impedance transformation ratios. To validate the design procedure, a 50-170 Ω transformer has been implemented, achieving better than -20 dB return loss from 0.95 to 2.2 GHz.
Keywords :
impedance convertors; coupled three-line impedance transformers; frequency 0.95 GHz to 2.2 GHz; reflection zeros; resistance 50 ohm to 170 ohm; symmetrical coupled three-line; Band-pass filters; Bandwidth; Broadband communication; Conductors; Couplings; Impedance; Stripline; Broadband; coupled lines; impedance matching; impedance transformer; three-line couplers;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2013.2290215
