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Mobile telephone apparatus

A mobile phone, receiving level technology, applied in electrical components, radio transmission systems, space transmit diversity and other directions, can solve problems such as low receiving sensitivity

Inactive Publication Date: 2007-08-08
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using the intended antenna in any case provides lower reception sensitivity

Method used

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  • Mobile telephone apparatus
  • Mobile telephone apparatus
  • Mobile telephone apparatus

Examples

Experimental program
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Embodiment Construction

[0015] Embodiments of the present invention are described below with reference to the drawings.

[0016] FIG. 1 is a general block diagram of a mobile phone according to an embodiment of the present invention.

[0017] In FIG. 1, a first antenna 1 is, for example, a telescopic rod antenna, and is attached to a case, such as a main body of a clamshell type mobile phone with a keypad, so as to allow the first antenna to be attached. The second antenna 2 is, for example, an inverted-F frame antenna, and is housed in a case with a cover portion of a liquid crystal display or the like.

[0018] The switching circuit 3 alternately sets the first and the second antenna 1, 2 into an available state. Received signals from the first and second antennas 1, 2 are supplied to a receiving circuit 4, respectively. The transmission signal from the transmission circuit 5 is supplied to the first and second antennas 1 , 2 via the switching circuit 3 .

[0019] The communication circuit 6 sup...

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PUM

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Abstract

The invention provides a cell phone which shows good receiving sensitivity even in a state where synchronization with a base station is not provided, such as power-on and detection of a dead space. The invention alternately switches between a plurality of antennas a predetermined number of times per fixed time predetermined in accordance with the number of perch channels in a state where synchronization with a base station is not provided, and sets an antenna whose mean value of the receiving level of each of these antennas is the highest as an antenna to be used subsequently, that is, an antenna to open a control channel.

Description

technical field [0001] The invention relates to a mobile phone equipped with a so-called diversity antenna comprising at least two antennas switched according to reception sensitivity. Background technique [0002] In general, mobile telephones equipped with diversity antennas are known. These mobile phones use one of predetermined antennas at power-on, or in a deadspace where the reception level has dropped below a predetermined value. That is, in a state where the mobile phone and radio waves from the base station are not synchronized, the mobile phone uses a predetermined antenna of one of the two, for example, one generally considered to have excellent reception sensitivity in the case where a whip antenna and a built-in antenna are provided. Stretch the rod antenna to receive radio waves from the base station and make the two antennas act as diversity antennas in providing synchronization. [0003] Such a mobile phone uses a whip antenna in a state where synchronizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04B7/08H04B7/00H04B7/005
CPCH04W52/283H04B7/0822H04W52/287H04B7/00H04B7/08H04B7/26
Inventor 木村泰久野田効司
Owner PANASONIC CORP