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We demonstrate a method for stacking and connecting KGD on each other. The method requires no pre-processing of the ICs and die placement can be done using standard pick and place machines. This novel process allows creating >200um high lithographically defined interconnects and is a simple, scalable and low cost alternative to other techniques for interconnecting 3D stacked ICs.
Among the many photonic technologies available for antenna beamforming, those which provide flat RF response over a very wideband RF bandwidth, high signal to noise ratio, multiple-beam capabilities and minimum complexity are to be preferred.
A photonic beamformer is presented, having smooth behavior. Third-order nonlinearities, resulting from its optoelectronic components, are investigated, with emphasis on their impact on the contrast of imaging radars. This contrast is shown to be severely limited by the induced RF nonlinearities. Limitations on the allowable modulation index are studied for linearly-chirped pulses returned from clutter.
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