Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
278 words
In a monopulse type radar receiver the combination comprising: a. a plurality of frequency-insensitive antennas arranged in an amplitude-sensitive array for receiving energy in the microwave region, b. a multi-channel lumped constant hybrid junction having a plurality of inputs corresponding to the number of said plurality of antennas and having a single output, c. a plurality of coupling circuits, each having a different time delay, for coupling the signals received at said antennas to the inputs of said hybrid junction, d. amplifier circuit means for amplifying the output signals from said hybrid junction, e. signal sorter means for providing a plurality of output signals corresponding to the plurality of signals received at said plurality of antennas, f. a summing circuit coupled to the output of said signal sorter for producing an output signal proportional to the sum of the output signals, g. a first differential circuit means coupled to the output of said signal sorter for producing an output signal proportional to the difference of two of the output signals, h. a second differential circuit means coupled to the output of said signal sorter for producing an output signal proportional to the difference of two other of the output signals, i. signal processing circuit means coupled to the outputs of said first and second differential circuit means and to the output of said summing circuit for producing a first output signal proportional to the quotient of the output signal from said first differential circuit and the output signal of said summing circuit, and a second output signal proportional to the quotient of the output signal from said second differential circuit and the output signal of said summing circuit.
Claim 2
Dependent Claim
278 words
In a monopulse type radar receiver the combination comprising: a. a plurality of frequency-insensitive antennas arranged in an amplitude-sensitive array for receiving energy in the microwave region, b. a multi-channel lumped constant hybrid junction having a plurality of inputs corresponding to the number of said plurality of antennas and having a single output, c. a plurality of coupling circuits, each having a different time delay, for coupling the signals received at said antennas to the inputs of said hybrid junction, d. amplifier circuit means for amplifying the output signals from said hybrid junction, e. signal sorter means for providing a plurality of output signals corresponding to the plurality of signals received at said plurality of antennas, f. a summing circuit coupled to the output of said signal sorter for producing an output signal proportional to the sum of the output signals, g. a first differential circuit means coupled to the output of said signal sorter for producing an output signal proportional to the difference of two of the output signals, h. a second differential circuit means coupled to the output of said signal sorter for producing an output signal proportional to the difference of two other of the output signals, i. signal processing circuit means coupled to the outputs of said first and second differential circuit means and to the output of said summing circuit for producing a first output signal proportional to the quotient of the output signal from said first differential circuit and the output signal of said summing circuit, and a second output signal proportional to the quotient of the output signal from said second differential circuit and the output signal of said summing circuit.
Claim 3
Dependent Claim
16 words
The radar receiver of claim 1 wherein said plurality of antennas comprises four frequency-insensitive conical spirals.
Claim 4
Dependent Claim
97 words
The receiver of claim 2 wherein the output of one of said four antennas is coupled to said hybrid junction without any delay, the output of a second of said four antennas is coupled to said hybrid junction with a first predetermined amount of delay, the output of a third of said four antennas is coupled to said hybrid junction wihh a delay different from said first predetermined amount, the output of the fourth of said four antennas is coupled to said hybrid junction with a delay different than either of said first or second predetermined delays.
Claim 5
Dependent Claim
25 words
The receiver of claim 3 wherein said hybrid junction combines the signals from said four antennas for producing four sequential pulses at the intermediate frequency.
Claim 6
Dependent Claim
27 words
The receiver of claim 1 wherein the output of said summing circuit is coupled as an input to said amplifier circuit means as an automatic gain control.
Claim 7
Dependent Claim
37 words
A raDar receiver of claim 1 wherein said receiver operates over a decade plus frequency band and excludes jamming signals that depend on inverting the tracking sense by phase inversion in the microwave stages of said receiver.