EP 0426972 B1 19940413 - Flat antenna.
Title (en)
Flat antenna.
Title (de)
Ebene Antenne.
Title (fr)
Antenne plane.
Publication
Application
Priority
FR 8911829 A 19890911
Abstract (en)
[origin: JPH03107203A] PURPOSE: To obtain a planar antenna capable of improving band width by a passive resonator, connected to a feeder through a hoop-like slot and maintaining symmetry in the case of circular polarization or double linear polarization. CONSTITUTION: A circular (or square) passive resonator 1 is connected to a feeder 4, through a loop-like slot 3 on a printed circuit of operational frequency. The slot 3 is connected between a conductor plate 2 and a disc-like conductor material area. Spacers 5 to 7, having low dielectric constants, are sealed between the feeder 4 and ground plates 8, 9 are especially the spacer 5 consists of a low dielectric constant material and is coated with a non-conductive protective material 13. The feeder 4 feeds a current to the slot 3 by an electromagnetic coupling, based on the quarter-wavelength stub of which terminal is opened, and the slot 3 is coupled with the resonator 1. Through this combination, a 20% wide pass band having a standing wave ratio <1.2 is obtained on a substrate in air, maximum radiation is in parallel with an arrow I, the ground plate 8 and the conductor 2 shield the radiation from the feeder 4, and radiation has good symmetry and a low intersecting polarization level.
IPC 1-7
IPC 8 full level
H01Q 21/06 (2006.01); H01P 5/08 (2006.01); H01P 5/10 (2006.01); H01Q 9/04 (2006.01); H01Q 13/08 (2006.01); H01Q 13/16 (2006.01); H01Q 21/24 (2006.01)
CPC (source: EP US)
H01Q 9/0414 (2013.01 - EP US); H01Q 9/0457 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
FR 2651926 A1 19910315; FR 2651926 B1 19911213; CA 2024992 A1 19910312; CA 2024992 C 19940726; DE 69008116 D1 19940519; DE 69008116 T2 19940721; EP 0426972 A1 19910515; EP 0426972 B1 19940413; JP 2951707 B2 19990920; JP H03107203 A 19910507; US 5539420 A 19960723
DOCDB simple family (application)
FR 8911829 A 19890911; CA 2024992 A 19900910; DE 69008116 T 19900910; EP 90117356 A 19900910; JP 23977790 A 19900910; US 26873594 A 19940630