Patent ID: 8031116

Claim:
A microwave antenna system comprising: a plurality of antenna elements arranged in an array having two spaced ends, a first group of at least two adjacent antenna elements positioned at one end of said array and a second group of at least two adjacent antenna elements positioned adjacent the other end of said array, a group phase shifter having an output electrically connected to said first group of antenna elements to control the signal phase in said first group, said output of said group phase shifter being connected through a switch to said second group of antenna elements to control the signal phase in said second group of antenna elements, individual phase shifters connected to individual middle antenna elements for at least several of the antenna elements between said first and second groups of antenna elements to control the signal phase in said individual middle antenna elements, and a 180 degree phase delay line, wherein said switch selectively electrically connects said phase delay line in series between said phase shifter and said second group of at least two antenna elements.