Antenna unit
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United States of America Patent
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-
Oct 1, 2002
Grant Date -
N/A
app pub date -
Nov 20, 2000
filing date -
Nov 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an antenna unit adapted to be incorporated inside a main body of a mobile radio set, there are provided a pair of helical antenna elements (102), (103) connected to a balanced feeding line (104), the helical antenna elements having antenna axes in a direction parallel to a base plate (201) of the radio set, and being arranged in proximity to the base plate of the radio set at a sufficiently small distance as compared with their wavelength. By conducting a balanced power supply to the helical antenna elements, an electric current component flowing on the base plate of the radio set can be reduced, thus decreasing influence of the human body when the radio set is carried by the human hand. Additionally, the antenna can posses radiation characteristics of both the electric current type antenna and the magnetic current type antenna, and therefore, the receiving performance when the radio set is tiltedly used will be enhanced.
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