Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2006-06-20
2006-06-20
Nguyen, Hoang V. (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S767000
Reexamination Certificate
active
07064723
ABSTRACT:
A spectral control antenna apparatus includes a feed region or feed gap and a surrounding space or medium. A signal path between a feed region and a surrounding space or medium is characterized by a length dependent impedance with a plurality of extrema whereby the antenna apparatus exhibits a desired spectral response. The invention is well-suited for application to planar antennas, particularly planar antennas characterized by a slot type transmission line structure. If such a transmission line structure is an offset slot line, then by overlapping sections of the offset slot line relatively low impedances are possible, thus enabling the large variations in impedance necessary for effective filtering behavior.
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Next-RF, Inc.
Nguyen Hoang V.
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