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1. (EP2377202) DUAL FREQUENCY ANTENNA APERTURE

Office : European Patent Office
Application Number: 08879229 Application Date: 22.12.2008
Publication Number: 2377202 Publication Date: 19.10.2011
Publication Kind : B1
Designated States: AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MT, NL, NO, PL, PT, RO, SE, SI, SK, TR
Prior PCT appl.: Application Number:SE2008051553 ; Publication Number: Click to see the data
IPC:
H01Q 21/28
H01Q 1/38
H01Q 9/16
H01Q 9/28
H01Q 13/08
H01Q 13/10
H01Q 21/30
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
21
Aerial arrays or systems
28
Combinations of substantially independent non-interacting aerial units or systems
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
1
Details of, or arrangements associated with, aerials
36
Structural form of radiating elements, e.g. cone, spiral, umbrella
38
formed by a conductive layer on an insulating support
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
9
Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04
Resonant aerials
16
with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
9
Electrically-short aerials having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
04
Resonant aerials
16
with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole
28
Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
13
Waveguide horns or mouths; Slot aerials; Leaky-waveguide aerials; Equivalent structures causing radiation along the transmission path of a guided wave
08
Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
13
Waveguide horns or mouths; Slot aerials; Leaky-waveguide aerials; Equivalent structures causing radiation along the transmission path of a guided wave
10
Resonant slot aerials
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
21
Aerial arrays or systems
30
Combinations of separate aerial units operating in different wavebands and connected to a common feeder system
CPC:
H01Q 21/28
H01Q 9/16
H01Q 9/28
H01Q 13/08
H01Q 13/10
Applicants: SAAB AB
Inventors: SVENSSON BENGT
Priority Data: 2008051553 22.12.2008 SE
Title: (DE) ZWEIFREQUENZ-ANTENNENAPERTUR
(EN) DUAL FREQUENCY ANTENNA APERTURE
(FR) OUVERTURE D'ANTENNE À DOUBLE FRÉQUENCE
Abstract: front page image
(EN) The invention provides an antenna structure comprising at least two stacked antenna apertures, a first antenna aperture with first antenna elements and at least a second antenna aperture with second antenna elements. The antenna structure is arranged for operation in at least a high and a low frequency band. The first antenna elements are arranged for operation in the high frequency band and said second antenna elements for operation in the low frequency band. The first antenna elements are arranged to have a polarization substantially perpendicular to the polarization of the second antenna elements. The second antenna elements are arranged in at least one group and each of said group, comprises a number of second antenna elements coupled in series and arranged to have a common feeding point on a straight feeding structure. One feeding structure is located adjacent to each group of second antenna elements. The direction of the feeding structure is substantially perpendicular to the polarization of the first antenna elements. The invention also provides a corresponding method and a radar system comprising the antenna structure.
(FR) L'invention se rapporte à une structure d'antenne comprenant au moins deux ouvertures d'antenne empilées, une première ouverture d'antenne étant pourvue de premiers éléments d'antenne et au moins une deuxième antenne étant pourvue de deuxièmes éléments d'antenne. La structure d'antenne est conçue pour fonctionner dans au moins une bande de fréquence élevée et faible. Les premiers éléments d'antenne sont conçus pour fonctionner dans la bande de fréquence élevée et les deuxièmes éléments d'antenne pour fonctionner dans la bande de fréquence faible. Les premiers éléments d'antenne sont conçus pour avoir une polarisation sensiblement perpendiculaire à la polarisation des deuxièmes éléments d'antenne. Les deuxièmes éléments d'antenne sont agencés sous forme d'au moins un groupe et chacun desdits groupes comprend un certain nombre de deuxièmes éléments d'antenne accouplés en série et conçus pour avoir un point d'alimentation commun sur une structure d'alimentation droite. Une structure d'alimentation est située de manière adjacente à chaque groupe de deuxièmes éléments d'antenne. La direction de la structure d'alimentation est sensiblement perpendiculaire à la polarisation des premiers éléments d'antenne. L'invention concerne également un procédé correspondant et un système radar comprenant la structure d'antenne.
Also published as:
IL212529US20110316734CN102257675IN3834/DELNP/2011ES2658816WO/2010/074618