US 6,208,299 B1Granted

Dual band antenna arrangement

AssigneeAllgon AB

InventorsBjörn Lindmark, Stefan Jonsson, Dan Karlsson

Life of this patent

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Abstract

An antenna arrangement for receiving and/or transmitting electromagnetic signals in two spaced-apart frequency bands including a first frequency band having a first center frequency (f1) and a second frequency band having a second center frequency (f2). A first set of antenna elements (A1) are operative in the first frequency band (f1), and a second set of antenna elements (A2) are operative in the second frequency band (f2). A feeding network (C, 10, C1, C2) is arranged for feeding signals to the respective sets of antenna elements. The first set of antenna elements (A1) are arranged geometrically so that the first set has a first length (D1) in a first direction. The second set of antenna elements (A2) are arranged geometrically so that the second set has a second length (D2) in said first direction. In order to obtain lobes with the same beam width, said first and second lengths (D1, D2) are substantially inversely proportional to the first and second center frequencies (f1, f2).

Claims14

Dependent claims

Antenna arrangement for receiving and/or transmitting electromagnetic signals in at least two spaced-apart frequency bands including a first frequency band having a first centre frequency (f1) and a second frequency band having a second centre frequency (f2), comprising

a first set of antenna elements (A1;
A11-A14) being operative in said first frequency band (f1),
a second set of antenna elements (A2;
A21-A28) being operative in said second frequency band (f2),
a feeding network arranged for feeding signals, in said first and second frequency bands, to said first and second set of antenna elements, respectively,
characterized in that
said antenna elements (A1;
A11-A14) in said first set of antenna elements are arranged geometrically so that said first set has a first length (D1;
D10) in a first direction,
said antenna elements (A2;
A21-A28) in said second set of antenna elements are arranged geometrically so that said second set has a second length (D2;
D20) in said first direction, and
said first and second lengths (D1, D2;
D10, D20) are substantially inversely proportional to said first and second centre frequencies (f1, f2).

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/525,521Filed 15 Mar 2000
Priority: SE 9900914-415 Mar 1999
Granted: 27 Mar 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01Q 21/30
Antenna arrays or systems: combinations of separate antenna units operating in different wavebands and connected to a common feeder system
H01Q 5/42
Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed…: using…
H01Q 5/50
Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements: feeding or…
H01Q 21/08
Arrays of individually energised antenna units similarly polarised and spaced apart: the units being spaced along or adjacent to a rectilinear path