Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2008-05-13
2008-05-13
Le, Lana (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S569100, C455S575100, C455S575500, C455S575800, C343S702000, C343S718000, C343S900000, C343S906000, C379S021000, C379S022000, C379S026020
Reexamination Certificate
active
07373169
ABSTRACT:
An earphone antenna includes an audio signal transmission path formed by connecting a first shield wire of a coaxial cable to a ground, connecting a central conductor of the coaxial cable to a pair of first signal lines of an earphone cable via a capacitor which exhibits high impedance in a frequency range of audio signals and low impedance in a frequency range of high frequency signals, and connecting a second signal line and a grounding wire, respectively, to the pair of first signal lines via a high frequency choke which exhibits low impedance in the frequency range of audio signals and high impedance in the frequency range of high frequency signals. Connecting the second shield wire to the ground causes formation of a sleeve antenna by the earphone cable and the second shield wire.
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Akbar Muhammad
Le Lana
Lerner David Littenberg Krumholz & Mentlik LLP
Sony Corporation
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