Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Reexamination Certificate
2009-09-15
2011-12-20
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
C343S793000, C343S882000
Reexamination Certificate
active
08081132
ABSTRACT:
A wideband antenna for receiving digital television signals includes a substrate, a radiating plate, a first radiating element, and a second radiating element. The radiating plate is formed on the substrate and the radiating plate has a first radiating area, a second radiating area and a slit formed between the first and the second radiating areas. The first and the second radiating elements are pivotedly connected to the radiating plate. The first radiating element and the second radiating element are constructed as a dipole antenna structure of the antenna so as to excite a first resonant mode. The radiating plate also acts as a matching circuit thereon so as to excite a second resonant mode. The center frequency of the second resonant mode is shifted toward the center frequency of the first resonant mode with the incorporation of the radiating plate so that the antenna has a wideband characteristic.
REFERENCES:
patent: 2753557 (1956-07-01), Middlemark
patent: 2969543 (1961-01-01), Cushing et al.
patent: 3045240 (1962-07-01), Raynor
patent: 3579241 (1971-05-01), Antista et al.
patent: 3739388 (1973-06-01), Callaghan
Ho Tan
Lite-On Technology Corporation
Rabin & Berdo P.C.
Silitek Electronic (Guangzhou) Co. Ltd.
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