Frequency scanning antenna

Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array

Reexamination Certificate

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Reexamination Certificate

active

07659849

ABSTRACT:
Embodiments of the invention are concerned with frequency scanning antennas for transceiving radio frequency energy for use in detecting and monitoring ground-based targets.In one arrangement the frequency scanning antenna is embodied as a structure that is capable of steering a radio frequency beam to a plurality of different angles about the antenna structure: the antenna structure comprises at least two array antennas and a controller for controlling input of energy to the two array antennas, and the array antennas are disposed within the antenna structure such that the antenna structure is capable of steering a beam to a first angle using one of said two array antennas and of steering a beam to a second angle, different to said first angle, using the other of said two array antennas.Thus in embodiments of the invention two or more array antennas are arranged to form an antenna structure, and the feed to a respective antenna array of the antenna structure is coordinated so that individual scan areas can be combined to generate an increased overall scan region.

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patent: WO 2004/046752 (2004-06-01), None
Tekin et al., “Simultaneous Frequency and Direction Finding Technique Using Frequency Scanning Antenna,” Proceedings of the European Microwave Conference. Espoo, Finland, 1:654-658, 1992.
ISR from PCT/EP2006/068732, mailed on May 2, 2007.
UK Search Report from GB0600685.2, mail date not provided.

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