Interference rejection GPS antenna system

A method for selectively receiving radio frequency (RF) signals, comprising the steps of:

• receiving RF signals using an array of antenna elements including a center antenna and a group of antenna elements surrounding said center antenna;
• determining pointing vectors from coordinate information, each pointing vector pointing to a source of one of the received RF signals;
• and
• forming a reception lobe in the direction of each pointing vector, wherein the center antenna is adjusted to a same phase shift for each reception lobe to maintain a phase center for the array of antenna elements.

Apparatus for selectively receiving radio frequency (RF) signals, comprising:

• an array of antenna elements for receiving RF signals, said array including a center antenna and a group of antenna elements surrounding the center antenna;
• a navigational controller comprising:
• an inertial measurement unit (IMU) for measuring changes in relative position of the apparatus;
• and
• a processor for determining pointing vectors based at least in part on coordinate information and the measured changes, wherein each said vector points to a source of a respective received RF signal;
• and
• beam-forming electronics connected to the array of antenna elements and the navigational controller for forming a reception lobe of the antenna array for each determined pointing vector, wherein a phase center for the array of antenna elements is maintained by adjusting the center antenna to a same phase shift for each lobe.

A method for selectively receiving radio frequency (RF) signals, comprising the steps of:

• receiving the RF signals using an antenna array having a center antenna;
• determining actual coordinate information from information conveyed by the RF signals;
• sensing at least one change between an inertial reference frame and a reference frame of the antenna;
• determining relative coordinate information based on the sensed changes;
• determining pointing vectors from the actual and the relative coordinate information, each said pointing vector pointing in the direction of a source one of the RF signals;
• and
• for each pointing vector, forming a reception lobe in a direction of the pointing vector, wherein the center antenna is adjusted to a same phase shift for each reception lobe to maintain a phase center for the antenna.