EP 0520197 A3 19941012 - Foil antenna.
Title (en)
Foil antenna.
Title (de)
Folienantenne.
Title (fr)
Antenne à feuille.
Publication
Application
Priority
DE 4121333 A 19910625
Abstract (en)
[origin: EP0520197A2] The invention relates to a foil antenna for radio telephones, especially cordless telephones. Instead of the previously normal rod antenna, whose length corresponds to a quarter of the wavelength of the frequency which is to be transmitted or received, a foil antenna is proposed as the antenna. The foil antenna according to the invention has radiating elements which are connected to one another by means of inductors. In addition, the matching circuit is accommodated on the foil. The inductors which are arranged between the radiating elements are essentially constructed as straight line pieces. The antenna according to the invention can be produced easily in production-engineering terms, can be completely integrated into the housing of the cordless telephone, and has a relatively high efficiency with dimensions which are considerably less than the length of the previously normal rod antenna. <IMAGE>
IPC 1-7
IPC 8 full level
H01Q 1/08 (2006.01); H01Q 1/24 (2006.01); H01Q 1/38 (2006.01); H01Q 5/00 (2006.01); H01Q 5/15 (2015.01); H01Q 9/06 (2006.01); H01Q 9/16 (2006.01); H01Q 9/38 (2006.01); H01Q 9/42 (2006.01)
CPC (source: EP)
H01Q 1/242 (2013.01); H01Q 1/38 (2013.01); H01Q 9/065 (2013.01)
Citation (search report)
- [PY] EP 0470797 A2 19920212 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [A] US 4079268 A 19780314 - FLETCHER JAMES C ADMINISTRATOR, et al
- [A] US 4816839 A 19890328 - LANDT JEREMY A [US]
- [A] GB 1009527 A 19651110 - COLLINS RADIO CO
- [A] US 2229865 A 19410128 - MORGAN HOWARD K
- [Y] PATENT ABSTRACTS OF JAPAN vol. 5, no. 44 (E - 50)<716> 24 March 1981 (1981-03-24)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0520197 A2 19921230; EP 0520197 A3 19941012; EP 0520197 B1 19970528; AT E153803 T1 19970615; DE 4121333 A1 19930114; DE 4121333 C2 19930909; DE 59208531 D1 19970703; ES 2103012 T3 19970816; JP H05191126 A 19930730; ZA 924346 B 19930224
DOCDB simple family (application)
EP 92108893 A 19920527; AT 92108893 T 19920527; DE 4121333 A 19910625; DE 59208531 T 19920527; ES 92108893 T 19920527; JP 16625392 A 19920624; ZA 924346 A 19920615