Internal Active Antenna for FM Radio Reception in Mobile Handsets

Author

Lindberg, P. ; Kaikkonen, A.

Author_Institution

Laird Technol., Goteborg

fYear

2007

fDate

11-16 Nov. 2007

Firstpage

1

Lastpage

10

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;

fLanguage

English

Publisher

iet

Conference_Titel

Antennas and Propagation, 2007. EuCAP 2007. The Second European Conference on

Conference_Location

Edinburgh

Print_ISBN

978-0-86341-842-6

Type

conf

Filename

4458431