Telecommunications – Transmitter and receiver at separate stations – Short range rf communication
Reexamination Certificate
2006-09-19
2006-09-19
Vo, Nguyen T. (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Short range rf communication
C455S003010, C455S011100, C455S269000, C340S870030, C340S007210, C342S422000, C342S429000
Reexamination Certificate
active
07110719
ABSTRACT:
It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable communication with a small fading effect. In order to attain this object, the present invention provides an indoor mobile communication device which is equipped with an antenna with fixed direction characteristics such as electromagnetic wave emission direction and half-power angle and is capable of mobile communications, while freely changing the position and direction inside an indoor space, this device comprising an antenna for transmission and reception of linearly polarized waves, the antenna having a half-power angle within 180 degrees and a directivity such that the emission level within a range of from 90 degrees to 270 degrees, as measured from the maximum emission direction, is less than the maximum emission level by 10 dB or more and a wireless unit for conducting modulation and demodulation of the signals superimposed on the electromagnetic waves transmitted and received via the antenna.
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Hachiga Hitoshi
Horibe Akio
Nguyen Thuan T.
Uniden Corporation
Vo Nguyen T.
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