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1. (IN3834/DELNP/2011) DUAL FREQUENCY ANTENNA APERTURE

Office : India
Application Number: 3834/DELNP/2011 Application Date: 23.05.2011
Publication Number: 3834/DELNP/2011 Publication Date: 06.04.2012
Publication Kind : A
Prior PCT appl.: Application Number:PCTSE2008051553 ; Publication Number:WO2010074618 Click to see the data
IPC:
H01Q 21/28
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
Q
AERIALS
21
Aerial arrays or systems
28
Combinations of substantially independent non-interacting aerial units or systems
Applicants: SAAB AB
Inventors: SVENSSON, BENGT
Priority Data:
Title: (EN) DUAL FREQUENCY ANTENNA APERTURE
Abstract:
(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.
Also published as:
IL212529EP2377202US20110316734CN102257675ES2658816WO/2010/074618