HONEYWELL'S new RDR-4000 DIGITAL WEATHER RADAR avoids the use of energy dissipating waveguides by mounting the radio frequency components--synthesizer and solid-state transmitter/receiver unit--on the antenna drive for the flat-plate, X-band antenna. Digital signals from the radar processor to the synthesizer are carried by coaxial cables, with only a short waveguide from the T/R to the antenna. Eliminating long waveguides, using pulse compression and low-noise gallium arsenide field effect ...

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