Title :
Broadband Planar 5:1 Impedance Transformer
Author :
Ehsan, Negar ; Hsieh, Wen-Ting ; Moseley, Samuel H. ; Wollack, Edward J.
Author_Institution :
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
This letter presents a broadband Guanella-type planar impedance transformer that transforms 50 Ω to 10 Ω with a 10 dB bandwidth of 1-14 GHz. The transformer is designed on a flexible 50 μm thick polyimide substrate in microstrip and parallel-plate transmission line topologies, and is inspired by the traditional 4:1 Guanella transformer. Back-to-back transformers were designed and fabricated for characterization in a 50 Ω system. Simulated and measured results are in excellent agreement.
Keywords :
impedance convertors; microstrip lines; bandwidth 1 GHz to 14 GHz; broadband Guanella-type planar impedance transformer; microstrip transmission line topologies; parallel-plate transmission line topologies; polyimide substrate; size 50 mum; Broadband communication; Cavity resonators; Conductors; Impedance; Substrates; Topology; Transmission line measurements; Broadband; impedance matching; parallel-plate line; transformers;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2015.2463106
