EP 0761021 B1 19980722 - LOW ELECTRIC OVERALL HEIGHT ANTENNA
Title (en)
LOW ELECTRIC OVERALL HEIGHT ANTENNA
Title (de)
ANTENNE MIT ELEKTRISCH NIEDRIGER BAUHÖHE
Title (fr)
ANTENNE DE FAIBLE HAUTEUR DE CONSTRUCTION ELECTRIQUE
Publication
Application
Priority
- DE 9600472 W 19960319
- DE 19510236 A 19950321
Abstract (en)
[origin: DE19510236A1] The invention concerns an antenna with a low electric overall height, preferably for frequencies in the GHz band. The antenna consists of a first electrically conducting surface (1), which in a first frequency band is no bigger in any of its dimensions than 3/8 lambda, and a second electrically conducting surface (2) of at least the same size which acts as an earth screen. The second conducting surface is essentially parallel to the first and faces it at a given distance (A). A conducting bridge (4) forms a high-frequency, low-impedance connection over a width (B) between one edge (5) of the first conducting surface (1) and the second conducting surface, and the first conducting surface (1) is electrically connected, for high frequencies, at a coupling point (3) by a conductor (15) at the antenna-connection point to the inside conductor of a coaxial cable (7) whose outside conductor (8) is connected to the second conducting surface (2). The dimensions of the antenna and of thecoupling point (3) are chosen such that the antenna is in resonance in the first frequency band. To produce resonance in at least one other frequency band, at least one of the two conducting surfaces and/or the conducting bridge (4) have slots (10) of a suitable width (9) and shape, and the edges of each slot are designed so that they determine the changes in current on the conducting surfaces (1, 2) and in the bridge (4) as a function of frequency in the first and in each other frequency band in such a way that the antenna both in the first and in each other frequency band almost exhibits resonance.
IPC 1-7
IPC 8 full level
H01Q 1/32 (2006.01); H01Q 5/357 (2015.01); H01Q 9/04 (2006.01); H01Q 13/10 (2006.01); H01Q 21/30 (2006.01)
CPC (source: EP US)
H01Q 1/3275 (2013.01 - EP US); H01Q 5/357 (2015.01 - EP US); H01Q 13/10 (2013.01 - EP US); H01Q 21/30 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
DE 19510236 A1 19960926; DE 59600359 D1 19980827; EP 0761021 A1 19970312; EP 0761021 B1 19980722; ES 2120811 T3 19981101; US 5850198 A 19981215; WO 9629757 A1 19960926
DOCDB simple family (application)
DE 19510236 A 19950321; DE 59600359 T 19960319; DE 9600472 W 19960319; EP 96907252 A 19960319; ES 96907252 T 19960319; US 71853696 A 19960930