Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Missile or spacecraft guidance
Reexamination Certificate
2005-10-04
2005-10-04
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Missile or spacecraft guidance
C342S013000, C342S020000, C342S059000, C342S061000, C244S003150, C244S003190, C343S872000
Reexamination Certificate
active
06952179
ABSTRACT:
A dual mode radar seeker comprising a wide-band passive anti-radar antenna system (3) at the rear of a radome (1), operating at relatively low radar frequencies in an amplitude comparison tracking mode, and a high-frequency (W-band) active amplitude-comparison antenna system (5) in the nose of the radome (1) and having a common boresight with the anti-radar system. The active system employs coarse phase shift steering (31, 41) of the antenna ‘beam’ for the transmit and, optionally, also, the receive ‘beam’. The high frequency and the use of phase shift steering both help to keep down the size of the active radar thus enabling it (5, 7, 9) to be positioned far forward in the nose of the radome (1) so as not to obscure the field of the anti-radar system (3).
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C.R. Seashore et al, “MM-Wave Radar and Radiometer Sensors for Guidance Systems”, Microwave Journal, Aug. 1979 vol. 22, #8, pp. 47-51.
BAE Systems Electronics Limited
Gregory Bernarr E.
Kirschstein et al.
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