US 7,579,995 B1
Near field nulling antenna systems
Wilhelmus H. Theunissen, Bensalem, Pa. (US); and Anthony W. Jacomb-Hood, Yardley, Pa. (US)
Assigned to Lockheed Martin Corporation, Bethesda, Md. (US)
Filed on Jul. 30, 2007, as Appl. No. 11/830,725.
Int. Cl. H01Q 11/12 (2006.01)
U.S. Cl. 343—742  [343/741; 343/867; 343/895] 22 Claims
OG exemplary drawing
 
1. An antenna system comprising:
a first antenna with a first operating frequency; and
a second antenna with a second operating frequency, the second antenna having a first near field, the first near field having a first near region in which the first antenna is disposed, the first near field having a second near region, the second antenna having a first gain in the first near region which is lower than a second gain in the second near region, the first gain and the second gain both being at a same one of the first operating frequency and the second operating frequency.