| 摘要 |
A directional locating device transmits pulsed RF signals at a stabilized frequency and is carried by an object the direction of which is to be determined from a distance remote from the transmitter. A one-half wave delay line in the receiver is responsive to the signal detected by a directional antenna for generating a 180 degree out-of-phase signal with respect to the signal detected by a sense antenna. A variable inductance coupling transformer having a primary winding is connected directly to the sense antenna and the output of the one-half wave delay line to produce at a secondary winding of the transformer a summation signal representing the summation of the 180 degree out-of-phase signal and the signal detected by the sense antenna. A second stabilized RF signal is generated at a different frequency than the RF signals radiated by the transmitting means and input into a mixer detector also responsive to the amplified summation signal to produce an AF signal indicative of the direction of the transmitter means from the receiver when the directional antenna is rotated to any given position relative to the transmitting means. A speaker receives the amplified AF signal to generate audible and non-audible signals, the latter being indicative of the direction of said transmitter means from said receiver.
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