Title :
Tri-band and dual-polarized antenna based on composite right/left-handed transmission line
Author :
Rennings, A. ; Liebig, T. ; Abielmona, S. ; Caloz, C. ; Waldow, P.
Author_Institution :
Carl-Friedrich-Gaustress-Str., Kamp-Lintfort
Abstract :
Relaxing the composite right/left-handed (CRLH) balance condition enables arbitrary tri-band CRLH resonant devices. This paper presents a tri-band and dual-polarized antenna based on this principle. The proposed CRLH antenna operates in the transversally-polarized zeroth order (ZO) shunt mode (n = 0) and in the two longitudinally-polarized half-wavelength (HW) modes (n = plusmn1). Explicit synthesis formulas are given for the CRLH tri-band operation. A specific microstrip design using MIM (metal-insulator-metal) series capacitors and shunt stub inductors is demonstrated. In this design, the three resonant modes n = -1, n = 0 and n = +1 exhibited similar input impedances (allowing a simple feeding structure), radiation patterns and efficiencies/gains.
Keywords :
MIM devices; antenna radiation patterns; capacitors; microstrip antennas; multifrequency antennas; transmission line theory; arbitrary tri-band CRLH resonant devices; composite right-left-handed transmission line; dual-polarized antenna; explicit synthesis formulas; longitudinally-polarized half-wavelength modes; metal-insulator-metal series capacitors; microstrip design; radiation patterns; transversally-polarized zeroth order shunt mode; tri-band antenna; Broadband antennas; Chromium; Dual band; Frequency; Impedance; Metal-insulator structures; Resonance; Shunt (electrical); Transmission line antennas; Zirconium;
Conference_Titel :
Microwave Conference, 2007. European
Conference_Location :
Munich
Print_ISBN :
978-2-87487-001-9
DOI :
10.1109/EUMC.2007.4405293
