Title :
Novel Smart Antenna based on Half-Wavelength Dipoles
Author :
Savov, S. ; Vasileva, V. ; Doneva, Maria
Author_Institution :
Dept. of Electr. Eng., Tech. Univ. of Varna, Varna
Abstract :
In this paper, the principles of uniform circular array (UCA) adaptive beamforming (ABF) based on narrowband radio-frequency signals are introduced. A UCA is composed of a number of uniformly distributed identical half-wavelength dipoles. The least mean squares (LMS) algorithm is applied to antenna beamforming in UCA. It is a method that exploits the array correlation matrix and uses previous samples when estimating the gradient at the nth iteration. The performance of smart antenna is deteriorated by the mutual coupling between its elements. Consequently, the ABF method produces inaccurate results unless it is taken into account.
Keywords :
adaptive antenna arrays; array signal processing; beam steering; correlation methods; dipole antenna arrays; electromagnetic coupling; gradient methods; least mean squares methods; matrix algebra; radiocommunication; adaptive antenna beamforming; array correlation matrix; gradient method; iteration method; least mean squares algorithm; mutual coupling; narrowband radio-frequency signal; smart antenna; uniform circular array; uniformly distributed half-wavelength dipole; wireless communication system; Smart antennas; least mean square method; mutual coupling; uniform circular array;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
