Radar system operating in two frequency bands

Communications: directive radio wave systems and devices (e.g. – Plural radar

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342 80, 342 95, G01S 1342, G01S 1372

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active

047439076

ABSTRACT:
A radar system for low-level target tracking comprises a first and a second radar apparatus, both apparatus operating at their own frequency, but employing one and the same tracking antenna. A target being tracked in range and angle coordinates by the first radar apparatus can be tracked in angle coordinates by the second apparatus and in range by the first radar apparatus when the target arrives within the range of the second radar apparatus. A preferred digital embodiment of this system is obtained by utilizing a common signal processing unit including a matched filter.

REFERENCES:
patent: 3603995 (1971-09-01), Howard
patent: 3713154 (1973-01-01), Kummer
patent: 3795913 (1974-03-01), Kosowsky et al.
patent: 3827049 (1974-07-01), Van Staaden et al.
patent: 4041487 (1977-08-01), Evans et al.
patent: 4090197 (1978-05-01), Cantrell
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patent: 4163975 (1979-08-01), Guilhem et al.
patent: 4319242 (1982-03-01), Lewis
patent: 4449127 (1984-05-01), Sanchez
Cross et al., "Trakx: A Dual-Frequency Tracking Radar"; Microwave Journal, (9/76, pp. 39-41).
Stiefvater, "Low Angle Tracking Technique"; Agard Conf. Proc.s No. 197; 6/76.

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