Portable telephone set

Details Portable telephone set Portable telephone set

2002-01-22

2008-03-25

Pan, Yuwen (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S067110, C455S088000, C455S575100

Reexamination Certificate

active

07349718

ABSTRACT:
A first housing14is provided with a first and a second terminals11a,11bto be connected with a first and a second external antennas. A second housing13is connected via a coaxial cable9with the first housing14. The first housing14includes a switch10connected via a capacitor3bwith the coaxial cable, for selectively connecting one of the first and second terminals11a,11bwhich provides higher receipt sensitivity on the basis of a switching signal and a DC power supply12connected via an inductance4bto the coaxial cable9. The second housing13includes a radio circuit2connected via the capacitance3awith the coaxial cable9, for processing a radio signal to be transmitted, supplying the processed radio signals to the first or second internal antenna7or8and processing the received radio signal. A control circuit1is connected via the inductance4ato the coaxial cable9for outputting the switching signal on the basis of the received signal level by the external antenna and an inductance connected between the coaxial cable and a circuit required to be supplied with the DC power supply. Thus the radio signal is transmitted/received and the DC power is supplied via the coaxial cable9.

REFERENCES:
patent: 5799245 (1998-08-01), Ohashi
patent: 6243563 (2001-06-01), Nakamura
patent: 62-147937 (1987-09-01), None
patent: 7-50625 (1995-02-01), None
patent: 9-46110 (1997-02-01), None
patent: 10-294686 (1998-11-01), None
English translation of JP 409046110.
Japanese Office Action dated Jun. 25, 2003, with partial English translation.
Japanese Office Action dated Mar. 19, 2003, with partial English translation.

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