Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2005-12-12
2008-03-04
Phan, Tho (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S730000, C343S792000
Reexamination Certificate
active
07339542
ABSTRACT:
An ultra-broadband antenna system is disclosed. The antenna system is a single tubular antenna structure comprising an asymmetrical dipole fed with a biconical dipole. The biconical dipole covers the high frequency spectrum, while the asymmetrical dipole covers intermediate frequencies. The invention further relates to a combination of the two dipole structures such that together they act as a monopole to cover the low frequency spectrum. A first RF connector attaches to the asymmetrical dipole and the biconical dipole, and a second RF connector excites the combination of the two dipoles as one large monopole. A choke minimizes interference between the asymmetrical/biconical dipoles and the monopole. The resulting frequency span is greater than 500:1, providing operation over the range of 20 MHz to 10 GHz.
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FIRST RF Corporation
Intelle Tech PLLC
Matthews Katharine I.
Phan Tho
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