RADAR SYSTEM
First Claim
Patent Images
1. A radar system for enhancing the reception of desired echoes comprising input means for receiving both desired and undesired signals;
- a microwave comparator coupled to the input means for establishing sum and difference signals;
a sum signal receiver connected to the comparator for amplifying the sum signal;
a difference signal receiver connected to the comparator for amplifying the difference signals;
a sum signal detector coupled to the sum signal receiver;
a quadrature difference phase detector connected to the sum signal receiver and to the difference receiver; and
a gate circuit coupled to the quadrature difference phase detector and to the sum signal detector.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a radar system for enhancing the reception of desired echoes by the elimination of background clutter. The system comprises a monopulse radar system provided with a quadrature error detector wherein the magnitude of the quadrature error signal is used to control the gain or sensitivity of the monopulse receiver.
-
Citations
5 Claims
-
1. A radar system for enhancing the reception of desired echoes comprising input means for receiving both desired and undesired signals;
- a microwave comparator coupled to the input means for establishing sum and difference signals;
a sum signal receiver connected to the comparator for amplifying the sum signal;
a difference signal receiver connected to the comparator for amplifying the difference signals;
a sum signal detector coupled to the sum signal receiver;
a quadrature difference phase detector connected to the sum signal receiver and to the difference receiver; and
a gate circuit coupled to the quadrature difference phase detector and to the sum signal detector.
- a microwave comparator coupled to the input means for establishing sum and difference signals;
-
2. The system of claim 1 wherein the sum signal receiver and the difference signal receiver contain mixer, preamp, variable attenuator and IF circuits.
-
3. The system of claim 2 further including a feedback circuit from the quadrature difference phase detector to both variable attenuators in both receivers.
-
4. The system of claim 3 further including a quadrature difference gate generator connected to the quadrature difference phase detector and the gate circuit to control the operation of the operation of the gate circuit.
-
5. The system of claim 4 further including a quadrature difference threshold coupled between the quadrature difference phase detector and the gate generator for setting the operating point of the generator and therefore the gate circuit.
Specification