Optical control of TR modules

Details Optical control of TR modules Optical control of TR modules

1991-11-06

1993-09-07

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Determining direction

With frequency or phase steering

342372, G01S 1300

Patent

active

052433501

ABSTRACT:
Prior art arrays of TR modules suffer from the disadvantage of requiring heavy and bulky waveguides or coaxial cables to provide controls therefore. In the present system, by using incoherent light to coherently synchronize the different TR modules of the array to produce a coherent phase array, the bulky waveguides and coaxial cables no longer are needed. To provide for the coherent synchronization of the phase array, oscillator and control signals are multiplexed onto different incoherent optical signals. The multiplexed optical signals are then summed and sent, via an optical fiber, to the TR modules of the array. At each of the TR modules, the oscillator signal and a corresponding control signal are separated from the summed optical signal and are used to weight the phase and amplitude of the radar signal to be transmitted from the TR module. When the properly synchronized and weighted modulated radar signal is sent from each of the TR modules, a coherently synchronized radar signal is produced.

REFERENCES:
patent: 4885589 (1989-12-01), Edward et al.
patent: 4967201 (1990-10-01), Rich, III
patent: 5089832 (1992-02-01), Vasile

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