Patent ID: 7009562

Claim:
An antenna comprising: a first substrate containing a plurality of transmitter chips, wherein each transmitter chip is comprised of a first series of phase shifters to control the scan angle and linear polarization of a first RF signal, a first 90° phase shifter to control the circular polarization of the first RF signal, and a first means for controlling the first series of phase shifters and the first 90° phase shifter; a second substrate containing a plurality of transmitter chips, connected at the output of the first substrate, wherein each transmitter chip is comprised of a second series of phase shifters to control the scan angle and linear polarization of a second RF signal, a second 90° phase shifter to control the circular polarization of the second RF signal, and a second means for controlling the second series of phase shifters and the second 90° phase shifter; and a balun substrate connected at the output of the second substrate containing a number of baluns that divides an RF signal into two equal signals that are 180° out of phase with each other.