发明名称 |
AN EXTERNAL ADAPTER FOR A PORTABLE CELLULAR PHONE |
摘要 |
The present invention provides a portable celullar phone and an external adapter for a portable celullar phone, with which it is possible to suppress an increase in an output power of a portable celullar phone transmit amplifier due to a loss at a transmit switch associated with use of an external transmitting antenna, and to reduce a deterioration of an NF of a receiving system due to a loss at a receive switch associated with use of an external receiving antenna. A transmit switch 109, which is disposed before a portable celullar phone transmit amplifier 103 which is disposed in a portable celullar phone 101, is connected to an input of a transmit amplifier part 115 of a portable celullar phone external adapter 112, while a receive switch 110 which is disposed after a portable celullar phone receive amplifier 108 is connected to an output of a receive amplifier part 118 of the portable celullar phone external adapter 112.
|
申请公布号 |
US2001051537(A1) |
申请公布日期 |
2001.12.13 |
申请号 |
US19980162619 |
申请日期 |
1998.09.29 |
申请人 |
NAKAMURA HIROYUKI;SAKAKURA MAKOTO;MAEGAWA TAKAAKI;KOSUGI HIROAKI;TAKAHASHI KENICHI |
发明人 |
NAKAMURA HIROYUKI;SAKAKURA MAKOTO;MAEGAWA TAKAAKI;KOSUGI HIROAKI;TAKAHASHI KENICHI |
分类号 |
H04B1/38;(IPC1-7):H04M1/00 |
主分类号 |
H04B1/38 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|