Large bandwidth SAW adaptive processor arrangement
AssigneeUnited Technologies Corporation
InventorsThomas W. Grudkowski, Gary K. Montress
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Abstract
A large bandwidth, tapped delay line (TDL) surface acoustic wave (SAW) adaptive processor arrangement, for processing a plurality of array values employed as tap weights in the TDL device. The weight quantities may be real or complex. In the complex case, no phase quadrature combiner is required as a result of the technique of offsetting the real and imaginary delay lines, or offset launching of the frequency waveforms to be mixed.
Claims2
An arrangement for selectively processing a plurality of complex array values employed as corresponding first and second tap weights in a first surface acoustic wave (SAW) device comprising a corresponding first and second adjacent series of field effect transistor (FET) elements effective for mixing oppositely launched radio frequency (RF) signals directed toward each other and said FET elements, said tap weights applied to corresponding ones of said FET elements, wherein said arrangement is characterized by an additional SAW device in parallel with said first SAW device and having an equivalent set of series FET elements and similarly subject to equivalent ones of said oppositely launched RF signals, and is further characterized by said additional SAW device being effective for producing a delay signal indicative of the selected tap weight, whereby the tap weights of said first SAW device are addressable by applying a signal on a corresponding one of said FET elements of said parallel SAW device.
Dependencies are inferred from the claim text.