Common aperture isolated dual frequency band antenna

Details Common aperture isolated dual frequency band antenna Common aperture isolated dual frequency band antenna

H - Electricity

01

Q

H01Q 5/00 (2006.01) H01Q 1/36 (2006.01) H01Q 1/38 (2006.01) H01Q 9/27 (2006.01)

Patent

CA 2176877

An antenna comprising a substrate (12), and low band and high band opposite sense spiral antennas (21, 22) formed on the substrate (12) to provide for a common aperture isolated dual frequency band antenna (10). The high band spiral antenna (22) is formed adjacent the center of the substrate (12) while the low band spiral antenna (21) is formed adjacent the periphery of the substrate. The high frequency end of the low band antenna (21) is truncated at the low frequency end of the high band antenna (22), and the low frequency end of the high frequency antenna (22) is truncated at the high frequency end of the low band antenna (21) to provide for mutual isolation between the frequency bands.

L'invention est une antenne comportant un substrat (12) et des antennes spirales de bande basse et de bande haute à sens opposés (21, 22) formées sur ce substrat (12) pour produire une antenne à deux bandes de fréquences isolées à ouverture commune (10). L'antenne spirale à bande haute (22) est formée au voisinage du centre du substrat (12), alors que l'antenne spirale à bande basse (21) est formée au voisinage de la périphérie du substrat. L'extrémité haute fréquence de l'antenne à bande basse (21) est tronquée à l'extrémité basse fréquence de l'antenne à bande haute (22), et l'extrémité basse fréquence de l'antenne à bande haute (22) est tronquée à l'extrémité haute fréquence de l'antenne à bande basse (21) pour isoler les deux bandes de fréquences l'une de l'autre.

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