发明名称 |
External adapter for portable cellular phone |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP0905915(A2) |
申请公布日期 |
1999.03.31 |
申请号 |
EP19980118410 |
申请日期 |
1998.09.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAKAMURA, HIROYUKI;SAKAKURA, MAKOTO;MAEGAWA, TAKAAKI;KOSUGI, HIROAKI;TAKAHASHI, KENICHI |
分类号 |
H04B1/38;(IPC1-7):H04B1/38 |
主分类号 |
H04B1/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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