Title :
Improved bandwidth low-profile miniaturized multi-arm logarithmic spiral antenna
Author :
Zhu, Shuyuan ; Ghazaany, T.S. ; Abd-Alhameed, R.A. ; Jones, S.M.R. ; Noras, J.M. ; Suggett, T. ; Van Buren, T. ; Marker, S.
Author_Institution :
Sch. of Eng., Design & Technol., Univ. of Bradford, Bradford, UK
Abstract :
A low-profile (λ/43) miniaturized multi-element antenna is presented, which displays vertical polarization with an omni-directional radiation pattern. The antenna uses a logarithmic spiral shape as the main radiating element such that the impedance bandwidth of the antenna is much improved in comparison with both a strip-line square spiral design and a strip-line circular spiral design. The antenna demonstrates stable gain and useful efficiency over the operating frequency band. Significantly, the antenna provides a low profile, omnidirectional pattern in the azimuth plane, polarizes normal to the ground-plane with a 1.2% bandwidth and 0.5 dBi gain.
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; omnidirectional antennas; spiral antennas; antenna impedance bandwidth; azimuth plane; bandwidth improvement; gain 0.5 dB; logarithmic spiral shape; low-profile miniaturized multiarm logarithmic spiral antenna; multielement antenna; omnidirectional pattern; operating frequency band; strip-line circular spiral design; strip-line square spiral design; vertical polarization; Antenna measurements; Antenna radiation patterns; Bandwidth; Resonant frequency; Spirals; Miniaturized antenna; omni-directional antenna; vertical polarization;
Conference_Titel :
Antennas and Propagation (EuCAP), 2014 8th European Conference on
Conference_Location :
The Hague
DOI :
10.1109/EuCAP.2014.6902174
