Communications: radio wave antennas – Antennas – Waterborne
Reexamination Certificate
2006-10-17
2006-10-17
Issing, Gregory C. (Department: 3662)
Communications: radio wave antennas
Antennas
Waterborne
C343S767000, C343S768000
Reexamination Certificate
active
07123200
ABSTRACT:
A sea surface antenna comprises a cylindrical tube of metallic material 13 on a dielectric former. The tube has a longitudinal slot shorted at each end and coupled at its midpoint to a coaxial feed. The slot is bridged by two groups of capacitances each group being distributed along a respective half of the slot. The length of the antenna is less than 0.25 λ and the diameter of the antenna is less than 0.02 λ, where λ is the free space wavelength at the operating frequency. The antenna is dimensioned so as to operate in an evanescent mode at a resonant frequency less than the cut-off frequency.
REFERENCES:
patent: 2762044 (1956-09-01), Boys et al.
patent: 4086598 (1978-04-01), Bogner
patent: 4367475 (1983-01-01), Schiavone
patent: 4639227 (1987-01-01), Rademakers
patent: 2165396 (1986-01-01), None
Smith et al, “A UHF Buoyant Antenna” International Conference on Antennas and Propagation (ICAP 87), Apr. 1987, p. 273-276.
Adams David Neil
Smith Martin Stevens
Issing Gregory C.
Miles & Stockbridge P.C.
Nortel Networks Limited
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