Title :
Internal Active Antenna for FM Radio Reception in Mobile Handsets
Author :
Lindberg, P. ; Kaikkonen, A.
Author_Institution :
Laird Technol., Goteborg
Abstract :
A ferrite loaded multi-turn loop antenna is proposed and evaluated for reception of FM radio in mobile phones. By co- designing the antenna element with an amplifier and using varactor diodes for frequency tuning, a G/T degradation compared to an ideal dipole antenna in a realistic urban environment of less than 23 dB over the entire FM band 88 - 108 MHz has been achieved. The antenna element occupies 1.5 cm3 and the circuits´ uses 1.5 cm2 PCB area. Theoretical and experimental results are presented together with design choice motivations and measurement procedures, including isolation measurements from a co-located GSM transmit antenna.
Keywords :
active antennas; loop antennas; mobile handsets; radio reception; FM radio reception; GSM transmit antenna; PCB; amplifier; antenna element; dipole antenna; ferrite loaded multi-turn loop antenna; frequency 88 MHz to 108 MHz; frequency tuning; internal active antenna; isolation measurements; mobile handsets; mobile phones; varactor diodes; Active antennas; Ferrite devices; Loop antennas; Mobile antennas; Receiving antennas;
Conference_Titel :
Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-0-86341-842-6
