Dual polarized antenna element with reduced cross-polarization

Details Dual polarized antenna element with reduced cross-polarization Dual polarized antenna element with reduced cross-polarization

1999-03-12

2000-08-22

Ho, Tan

Communications: radio wave antennas

Antennas

Microstrip

343846, 333 24C, H01Q 138

Patent

active

061079650

ABSTRACT:
The dual polarized antenna element includes a planar radiating element (2) arranged in a first plane; a metallic surface (4) arranged in a second plane and provided with slots (5,6; 5,6.1,6.2) extending under the radiating element (2); a supply conductor structure (7,8) arranged in a third plane so as to be coupled with the slots (5,6; 5,6.1,6.2) in the second plane, which is located above the third plane. One slot (5) extends on a line of symmetry (11) of the radiating element (2) and the other slot (6; 6.1,6.2) runs perpendicularly to and mirror symmetric to the line of symmetry (11). In order to provide the highest possible decoupling of both polarizations, the other slots (6; 6.1,6.2) running perpendicular to the line of symmetry (11) is coupled with a supply conductor (8) of the supply conductor structure (7,8) at two points (12,14;13,15) located at respective mirror symmetric positions relative to the line of symmetry and is mirror symmetric to the line of symmetry (11) thus acting as a branching conductor.

REFERENCES:
patent: 5241321 (1993-08-01), Tsao
patent: 5355143 (1994-10-01), Zurcher et al.
patent: 5396202 (1995-03-01), Scheck
patent: 5448250 (1995-09-01), Day
patent: 5608413 (1997-03-01), Macdonald
patent: 5668558 (1997-09-01), Hong
patent: 5907305 (1999-05-01), Epp et al.
"Dual Slot-Coupled Microstrip Antenna For Dual Frequency Operation" by Y. Murakami et al, Electronics Letters, Oct. 28, 1993, vol. 29, No. 22, pp. 1906-1907.
"Construction Of A Slot-Coupled Planar Antenna For Dual Polarisation" by M. Yamazaki, et al, Electronics Letter, Oct. 27, 1994, vol. 30, No. 22, pp. 1814-1815.
"Printed Radiating Element With Two Highly Decoupled Input Ports" by P. Brachat et al, Electronics Letter, Feb. 16, 1995, vol. 31, No. 4, pp. 245-246.

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