Direction finding interferometer for a linear fm signal

Claim 1

A direction finding interferometer apparatus for a linear FM signal comprising in combination: an antenna array to receive a linear FM/CW signal, and antenna array being arranged in a crossed baseline interferometer array, said antenna array providing output signals, a sequencer unit connected to said antenna array, said sequencer controlling the passage of said output signals, said sequencer deriving an output signal pair from said output signals, a receiver connected to said sequencer, said receiver having first and second input channels, said receiver receiving said output signal pair at said first and second input channels, said first and second input channels having a balanced RF switch, said balanced RF switch providing equal amplitude and phase response. a synthesizer programmer unit to control said receiver, said synthesizer programmer unit providing VFO injection and a linear ramp to said receiver, said synthesizer programmer providing an instantaneous RF carrier frequency to said sequencer to be sequenced into said receiver as a calibration signal, said receiver providing IF output signals, an IF amplifier unit to receive said IF output signals, said IF amplifier unit amplifying said IF output signals and providing amplified IF output signals, and a monitor oscilloscope connected to said IF amplifier unit to receive said amplified IF output signals, said oscilloscope displaying said amplified IF output signals.