Patent ID: 6774859
Filing Date: 2004-08-10
Classification: H01Q,H04B

Abstract:
An electromagnetic antenna apparatus; the apparatus exhibiting a generally continuous signal response between a first frequency and a second frequency; the apparatus exhibiting a deviation from said signal response in a frequency region centered substantially at a selected frequency between said first frequency and said second frequency; the apparatus comprising:(a) a substantially planar substantially plate-like antenna transceiving element having a periphery; (b) a feed structure; said feed structure being coupled with said antenna transceiving element for communicating transceiving signals with said antenna transceiving element; and (c) a discontinuity structure in said periphery; said discontinuity structure being connected with said feed structure; said discontinuity structure being configured for effecting return of selected said transceiving signals to said feed structure as return signals; said return signals effecting said deviation.