Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Reexamination Certificate
2008-04-02
2010-12-28
Phan, Tho G (Department: 2821)
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
C343S745000, C343S795000, C343S850000
Reexamination Certificate
active
07859478
ABSTRACT:
A dipole antenna is provided herein with improved performance at a lower end of the antenna's operating frequency range. According to one embodiment, the dipole antenna may include a plurality of antenna elements coupled to impedance transformer via a pair of cones and a pair of ears. The dipole antenna may also include a high-pass matching network specifically configured to improve antenna performance at the lower end of the operating frequency range. For example, a first stage of the matching network (i.e., closest to the antenna elements) may include two series capacitors, while a second stage of the matching network (i.e., furthest from the antenna elements) includes an inductor coupled in shunt between the two capacitors.
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International Search Report & Written Opinion, PCT/US2008/059145, mailed Jun. 27, 2008.
Daffer Kevin L.
Daffer McDaniel LLP
Phan Tho G
TDK Corporation
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