Internal broadband antenna for hand-held terminals with reduced gain in the direction of the user´s head

Author

Fuhl, Jose ; Balducci, Paolo ; Nowak, Paul ; Bonek, Ernst

Author_Institution

Inst. fur Nachrichtentech. und Hochfrequenztech., Tech. Univ. Wien, Austria

Volume

2

fYear

1995

fDate

25-28 Jul 1995

Firstpage

848

Abstract

We analyze the performance of a radiation-coupled dual-L antenna (RCDLA). It is mounted on the back side of the hand-held terminal, making use of the metallic housing as a shielding structure. In terms of shielding effectiveness and radiation characteristics, our simulations and measurements show a similar performance of this structure compared to the short circuit planar inverted-F antenna (FS-PIFA). Placement of the antenna on the back side of the housing, instead of the terminal top, results in a radiation pattern that points away from the user. The gain in the direction of the users head is about 10 dB less than in the main beam region

Keywords

antenna radiation patterns; electromagnetic shielding; land mobile radio; mobile antennas; telephone sets; telephony; hand held terminals; internal broadband antenna; main beam region; measurements; metallic housing; performance; radiation characteristics; radiation-coupled dual-L antenna; shielding effectiveness; shielding structure; short circuit planar inverted-F antenna; simulation; user head; Antenna measurements; Antenna radiation patterns; Bandwidth; Broadband antennas; Circuits; Directive antennas; Humans; Mobile antennas; Telephone sets; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1995 IEEE 45th

Conference_Location

Chicago, IL

ISSN

1090-3038

Print_ISBN

0-7803-2742-X

Type

conf

DOI

10.1109/VETEC.1995.504988

Filename

504988