06774859 is referenced by 172 patents.

An electromagnetic antenna apparatus exhibits a generally continuous signal response between a first frequency and a second frequency, and further exhibits a deviation from the signal response in a frequency region centered substantially at a selected frequency between the first frequency and the second frequency. The apparatus includes: (a) an antenna transceiving element; (b) a feed structure coupled with the antenna receiving element for communicating transceiving signals with the antenna transceiving element; and (c) a discontinuity structure in the antenna transceiving element coupled with the feed structure. The discontinuity structure is configured for effecting return of selected transceiving signals to the feed structure as return signals. The return signals effect the deviation.

Title
Ultra wideband antenna having frequency selectivity
Application Number
10/77340
Publication Number
6774859 (B2)
Application Date
June 1, 2002
Publication Date
August 10, 2004
Inventor
Glenn P Wolenec
Madison
AL, US
Hans G Schantz
Huntsville
AL, US
Agent
Law Office of Donald D Mondul
US
Assignee
Time Domain Corporation
AL, US
IPC
H01Q 11/12
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