Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
247 words
A circuit arrangement for side lobe suppression in radar devices comprising a primary directive radar antenna, a primary radar receiver connected to said primary radar antenna, an auxiliary omnidirectional antenna, an auxiliary receiver connected to said auxiliary antenna, a weighting multiplier receiving the output of said auxiliary receiver, an adder receiving the outputs of said weighting multiplier and said primary radar receiver, a change-over switch receiving the outputs of said adder and said primary radar receiver, a return loop connected to said weighting multiplier to vary its weighting factor and said return loop receiving the output of said adder and said auxiliary receiver, a first comparator (KP1) receiving an output of said return loop and connected to said change-over switch to supply either the output of said adder or said primary radar receiver to an output terminal, a second comparator (KP2) receiving the outputs of said adder and said primary radar receiver and connected to said change-over switch to supply either the output of said adder or said primary radar receiver to said output terminal, and a control characteristic device receiving the output of said auxiliary receiver, a gain control means with a gain control in said return loop and said control characteristic device connected to said gain control means whereby the weighting factor (V) is proportional to the square of the inverse noise signal (S 2 ) at the output of said auxiliary receiver according to the equation V=(a/S 2 ) where a is a constant.
Claim 2
Dependent Claim
247 words
A circuit arrangement for side lobe suppression in radar devices comprising a primary directive radar antenna, a primary radar receiver connected to said primary radar antenna, an auxiliary omnidirectional antenna, an auxiliary receiver connected to said auxiliary antenna, a weighting multiplier receiving the output of said auxiliary receiver, an adder receiving the outputs of said weighting multiplier and said primary radar receiver, a change-over switch receiving the outputs of said adder and said primary radar receiver, a return loop connected to said weighting multiplier to vary its weighting factor and said return loop receiving the output of said adder and said auxiliary receiver, a first comparator (KP1) receiving an output of said return loop and connected to said change-over switch to supply either the output of said adder or said primary radar receiver to an output terminal, a second comparator (KP2) receiving the outputs of said adder and said primary radar receiver and connected to said change-over switch to supply either the output of said adder or said primary radar receiver to said output terminal, and a control characteristic device receiving the output of said auxiliary receiver, a gain control means with a gain control in said return loop and said control characteristic device connected to said gain control means whereby the weighting factor (V) is proportional to the square of the inverse noise signal (S 2 ) at the output of said auxiliary receiver according to the equation V=(a/S 2 ) where a is a constant.
Claim 3
Dependent Claim
50 words
A circuit arrangement according to claim 1 characterized in that the amplification V=(a/S 2 ) occurs in an amplifier (V2) which is mounted in said return loop between a corrolator (K) and said weighting multiplier (M) and said corrolator (K) receives the outputs of said adder and said auxiliary receiver.
Claim 4
Dependent Claim
49 words
A circuit arrangement according to claim 2 characterized in that a delay line (VZ) is mounted ahead of said change-over switch (U), and said delay line (VZ) causing a delay of the output signal which is equal to or greater than the measuring time in said comparison means (KP2).
Claim 5
Dependent Claim
42 words
A circuit arrangement according to claim 1 characterized in that the amplification V=a/S 2 occurs in an amplifier (V2) which receives the output of said adder and a corrolator (K) which receives the outputs of said amplifier (V2) and said auxiliary receiver.
Claim 6
Dependent Claim
57 words
A circuit arrangement according to claim 1 including a corrolator (K) and the amplification V=a/S 2 is accomplished in two separate amplifiers (V2', V2") with each respectively pre-connected to two inputs of said corrolator (K) and the gains of each being inversely proportional to the noise amplitude (S) in the auxiliary channel according to the equation V'=(a/S).