True-Time-Delay (TTD) Analog Networks Mitigating Ultra-Wideband Beam-Squint in Massive Arrays

Eliminating spatial beam-squint dispersion in wideband phased arrays through switched optical and RF true-time-delay lines.

The Ultra-Wideband Beam-Squint Phenomenon

In 30 GHz wideband arrays, phase shifters introduce frequency-dependent steering angle deviations (beam squint). Left uncorrected, high-frequency radar subcarriers illuminate different physical locations than low-frequency subcarriers, distorting target images.

Switched True-Time-Delay Delay Line Matrices

ISACRF replaces conventional phase shifters with switched true-time-delay stages built from artificial transmission lines and optical delays. Signal propagation delay is independent of carrier frequency, maintaining razor-sharp pencil beams.

True-time-delay network eliminating beam squint across 30 GHz bandwidth
Sub-picosecond delay resolution with switched microstrip delay lines
Simultaneous alignment of wideband radar beams and communication lobes
Scalable architecture supporting 256-element phased arrays

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