Patent ID: 9160072
Filing Date: 2015-10-13
Classification: G01S,H01Q

Abstract:
1. An antenna system comprising: a main array antenna including a first plurality of antenna elements defining a first aperture, the main array antenna having a first antenna pattern that includes a main beam and side lobes, the side lobes being primarily concentrated within one or more distinct side lobe regions, wherein the first antenna pattern has primary side lobes concentrated within two orthogonal side lobe regions of the first antenna pattern; and a guard array antenna including a first linear array of antenna elements and a second linear array of antenna elements disposed orthogonally to the first linear array of antenna elements, the first and second linear arrays defining a second aperture, the guard array antenna having a second antenna pattern with a shape that encompasses the one or more distinct side lobe regions of the first antenna pattern and substantially follows a shape of the one or more distinct side lobe regions of the first antenna pattern, wherein the second antenna pattern has a shape that substantially follows the two orthogonal regions of the first antenna pattern.