Communications: radio wave antennas – Antennas – With grounding structure
Reexamination Certificate
2007-07-26
2010-06-01
Wimer, Michael C (Department: 2821)
Communications: radio wave antennas
Antennas
With grounding structure
C343S829000
Reexamination Certificate
active
07728783
ABSTRACT:
An antenna structure includes a connection portion. A feed portion connecting to the connection portion defines a feed point thereon. An inductance portion extends from the connection portion, and a free end of the inductance portion connects to a ground end. A capacitance portion that is in a long narrow strip shape extends from the connection portion and is parallel with and adjacent to the ground end. And radiating portions connect to the connection portion respectively. The antenna structure employs the inductance portion, the capacitance portion and the ground end to simulate a LC parallel connection to substitute for an inductor and a capacitor. Therefore, the antenna structure achieves an aim of adjusting a resonance frequency and an impedance matching without the inductor and the capacitor, simplifying the design of the antenna structure, decreasing the manufacture cost and attaining a good performance.
REFERENCES:
patent: 6650294 (2003-11-01), Ying et al.
Chen Hung-Jen
Lin Ching-Chi
Shih Kai
Su Jia-Hung
Wu Yu-Yuan
Birch & Stewart Kolasch & Birch, LLP
Cheng Uei Precision Industry Co. Ltd.
Wimer Michael C
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