Patent ID: 7432872
Filing Date: 2008-10-07
Classification: H01Q

Abstract:
1. A reduced height vertically polarized log periodic antenna comprising: a pair of antenna booms; a first plurality of vertical antenna radiating elements connected to the booms; a second plurality of vertical antenna radiating elements connected to the booms; a plurality of tuned horizontal antenna radiating elements, each tuned horizontal radiating element connected to the top of one of the second plurality of vertical antenna radiating elements; and a plurality of tuned upwardly bent horizontal antenna radiating elements, each tuned upwardly bent horizontal antenna radiating element connected to the bottom of one of the second plurality of vertical antenna radiating elements, the second plurality of antenna radiating elements having been shortened from their original design length to fit vertically under the rotating blades of a helicopter, and the tuned horizontal radiating elements having been added to the shortened radiating elements to bring the shortened radiating elements back to their desired frequency response.