Patent ID: 7450068

Claim:
A device for receiving a radio frequency (RF) communication signal transmitted from a source and concurrently determining the direction of the source, comprising: a phased array antenna disposed in a plane, the phased array antenna for receiving the communication signal at an angle offset from a boresight vector extending from the plane, the phased array antenna comprising: a first subarray, having a first group of elements, each element of the first group of elements for receiving the RF signal; and a first subarray summer, coupled to each of the elements in the first group of elements, the first subarray summer for generating a first subarray analog RF output (A) from the sum of the RF signals received by each of the elements in the first group of elements; a second subarray, having a second group of elements, each element of the second group of elements for receiving the RF signal; and a second subarray summer, coupled to each of the elements in the first group of elements, the second array summer for generating a second sub array analog RF output (B) from the sum of the RF signals received by each of the elements in the second group of elements; a combining network, coupled to the first array sum analog RF output and the second array sum analog output, the combining network for generating a combining network output comprising: an analog RF array output representing the received signal as the sum of the first subarray output, the second subarray output (A+B); and an analog RF error signal proportional to the angle offset from the boresight vector extending from the plane, the error signal generated as a difference between the first subarray output and the second subarray output; a first receiver, communicatively coupled to the analog RF array output and an output of the phased array antenna; and a second receiver, communicatively coupled to the analog RF error signal and the array controller.