Electrically small receive-only resonant antennas with wideband performance for FM radio reception in mobile phones

Author

Lindberg, Peter ; Irmscher, Stefan ; Kaikkonen, Andrei

Author_Institution

Laird Technol., Kista, Sweden

fYear

2010

fDate

1-3 March 2010

Firstpage

1

Lastpage

4

Abstract

An antenna concept for FM radio reception in mobile phones is proposed and evaluated. By resonating a loop or monopole radiator with a shunt element and connecting the antenna to a high-impedance low noise amplifier, an equivalent antenna efficiency of -24Â±3 dB is achieved over the entire band of 88 - 108 MHz despite having high-Q gain characteristics and without using control voltages for frequency tuning. Due to the resonant frequency behavior >45 dB isolation against co-located transmitting antennas is realized, thereby preventing the amplifier from being saturated during simultaneous operation. A comparison with the hands-free cord and other possible internal solutions is included.

Keywords

broadband antennas; low noise amplifiers; mobile radio; monopole antennas; FM radio reception; electrically small receive-only resonant antenna; frequency 88 MHz to 108 MHz; high-impedance low noise amplifier; mobile phone; monopole radiator; resonant frequency behavior; shunt element; wideband performance; Broadband amplifiers; Broadband antennas; Joining processes; Low-noise amplifiers; Mobile antennas; Mobile handsets; Radiofrequency amplifiers; Receiving antennas; Resonance; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology (iWAT), 2010 International Workshop on

Conference_Location

Lisbon

Print_ISBN

978-1-4244-4883-8

Electronic_ISBN

978-1-4244-4885-2

Type

conf

DOI

10.1109/IWAT.2010.5464788

Filename

5464788