Patent ID: 7847747
Filing Date: 2010-12-07
Classification: H01Q

Abstract:
1. A wideband orientation-independent antenna which presents a hemispherical circular polarization characteristic to incoming signals such that the signals are detected regardless of polarization and angle of arrival, comprising: a pair of vertical loops, each loop having loop elements that make up a vertical loop, the vertical loops positioned orthogonal one to the other; a horizontal loop make up of loop elements; a phasing module for driving said vertical loops with a 90 degree phase shift there between and for driving said horizontal loop with signals that are offset 90 degrees from those driving said vertical loops, such that said antenna presents an orientation-independent circular polarization characteristic and hemispherical coverage; and, a short circuit used between selected loop elements to decrease the VSWR at the lower frequence in the frequency band in which the antenna is to operate.