A formula is derived to give the variation in received voltage when an elliptically polarized antenna is rotated in a plane ransverse to the direction of propagation of the incident elliptically tolarized wave. It is shown that a circularly polarized antenna will pot receive any of its transmitted energy which is reflected from a nighly conducting smooth surface. Conditions that must be satisfied ho obtain an omnidirectional circularly polarized pattern are derived. Experimental results are given.