Composite right/left handed transmission line phase shifter using ferroelectric varactors

Autor:	Spartak Gevorgian, Peter Linner, Andrei Vorobiev, Dan Kuylenstierna
Rok vydání:	2006
Předmět:	Materials science business.industry Metamaterial Condensed Matter Physics Ferroelectricity Cutoff frequency Transmission line Electronic engineering Optoelectronics Electrical and Electronic Engineering Center frequency business Varicap Phase shift module DC bias
Zdroj:	IEEE Microwave and Wireless Components Letters. 16:167-169
ISSN:	1531-1309
DOI:	10.1109/lmwc.2006.872145
Popis:	A composite right/left handed (CRLH) transmission line (TL) phase shifter, using ferroelectric (Ba/sub 0.25/Sr/sub 0.75/TiO/sub 3/) varactors as tunable element, is presented for the first time. It is theoretically and experimentally demonstrated how the unique features of CRLH TLs, enables a differential phase shift with flat frequency dependence around the center frequency. The experimental prototype is a coplanar design integrated on a high resistive Si substrate. It includes four CRLH T-unit cells and has a physical length of 3850/spl mu/m. The ferroelectric varactors are realized in parallel plate version. Under 15-V dc bias applied over each varactor, the differential phase shift is flat around 17GHz and has an absolute value of 50/spl deg/.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5484fcc8ee3211b2ff5066621ce0980a https://doi.org/10.1109/lmwc.2006.872145 Zobrazit plný text záznamu