Direction finder after watson-watt principle - uses single channel receiver with cyclic input from crossed antenna systems

摘要

The directional location method after the Watson-Watt principle using only a single channel receiver approximately achieves the location and display characteristics of a multiple channel visual radio direction finder. Frequency variations in the located transmitter and the receiver oscillator do not lead to phase errors. The voltages from two crossed directional antenna systems are cyclically fed to the receiver both individually and in superposition. The receiver output is routed to different processing channels according to the input mode. The voltages are resolved into equal frequency alternating signals driving display X and Y coordinates.