Patent ID: 6954176
Filing Date: 2005-10-11
Classification: H01Q,H04B

Abstract:
1. A monopulse antenna array comprised of individual antennas for increasing the directional resolution and angular coverage, of which the radiation directional characteristic is characterized by a sum diagram and a differential diagram, wherein the individual antennas are connected via one or more phase-shifters and one or more hybrid junctions, wherein the antenna array includes a sum input for selecting the individual antennas, so that the radiation directional characteristic exhibits a sum diagram, wherein the antenna array includes a differential input for selecting the individual antennas so that the radiation pattern exhibits a differential diagram, wherein at least one of the phase shifters or hybrid junctions is switchable, so that the radiation directional characteristic exhibits further differential diagrams by the resulting change of the phase behavior due the selection of the individual antennas, wherein the means by which the individual antennas are connected with each other comprises a 3 dB four-grid hybrid junction, two three-grid power dividers ( wherein the connecting line length between the second set of antennas ( wherein the inputs of the four-grid 3 dB hybrid junction (