Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1983-05-20
1987-08-25
Laroche, Eugene R.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
343776, 343784, 343778, 343853, 333 26, 333 33, 333126, 333129, 333117, H01Q 322, H01Q 324, H01Q 326
Patent
active
046896279
ABSTRACT:
A dual band, phased array antenna especially adaptable for tactical radar capable of performing search, track and identification in a hostile jamming environment. The dual band array antenna is essentially two antennas sharing a common antenna aperture. The two antennas possess separate feed system and beam steering control. Thus, the beams for each frequency band can be steered independently and simultaneously. This design utilizes an ultra-wide band radiating element which can operate over approximately an octave bandwidth encompassing two adjacent microwave bands. In particular, the dual band signals can be received efficiently by the radiating element. A dual band coaxial-to-waveguide transition can be used to carry the signals to a diplexer. The dual band signals are separated at the diplexer and can be processed in separate feed networks. The advantages of this dual band phased array technique include not only good impedance characteristics but also the absence of grating lobe formation and cross coupling problems.
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Chu Ruey S.
Lee Kuan M.
Tang Ray
Wong Nam S.
Hughes Aircraft Company
Karambelas Anthony W.
LaRoche Eugene R.
Lee Benny T.
Runk Thomas A.
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