Communications: radio wave antennas – Antennas – With lumped reactance for loading antenna
Reexamination Certificate
2005-07-12
2005-07-12
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
With lumped reactance for loading antenna
C343S713000
Reexamination Certificate
active
06917341
ABSTRACT:
A top-loading monopole antenna apparatus having a feeding point is provided for use in a communication system such as a mobile communication system or the like. The top-loading monopole antenna apparatus includes a grounding conductor, a top-loading electrode, a linear conductor element, and a short-circuit conductor. The grounding conductor is provided so as to oppose the grounding conductor. The linear conductor element electrically connects the feeding point with the top-loading electrode, and the short-circuit conductor electrically connects the top-loading electrode through a reactive element. This antenna structure leads to a height which is lower than that of prior art, and easy impedance matching.
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Michael A. Morgan et al., “Eigenmode Analysis of Dielectric Loaded Top-Hat Monopole Antennas”, IEEE Transaction on Antennas and Propagation, vol. 42, No. 1, pp. 54-61, Jan. 1994.
Inatsugu Susumu
Ishihara Hirotaka
Maeda Tomoyuki
Ogawa Koichi
Yamamoto Atsushi
Chen Shih-Chao
Wenderoth , Lind & Ponack, L.L.P.
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