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Mobile communication terminal

A technology of mobile communication equipment and signals, which is applied in transmission systems, antennas, antenna supports/installation devices, etc., and can solve problems such as deterioration of antenna characteristics

Inactive Publication Date: 2008-11-05
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the linear antenna and the surface mount antenna are installed adjacently, when the retracted linear antenna is stored in the protective case, the antenna tip portion and the protective case portion which are covered with the surface mount antenna may be damaged by the user. Covered by hand, so there will be a problem that the required antenna characteristics will be deteriorated

Method used

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  • Mobile communication terminal
  • Mobile communication terminal
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Embodiment Construction

[0027] Embodiments of the present invention will be described with reference to the drawings. The embodiments are described considering, for example, a foldable cellular phone as a mobile communication terminal.

[0028] figure 1 The representation corresponds to the structure of the mobile communication terminal in the first embodiment of the present invention. The terminal includes a first housing 1 and a second housing 2 . The shells are connected by hinges 3, so they can rotate around the hinges. The first housing 1 includes an earbud receiver 11 that transmits an audio signal, and a display unit 12 that displays a communication state or communication content therein. The second housing 2 includes an operation unit 21 for inputting information received by the terminal, and a microphone 22 for receiving audio signals.

[0029] First, the positional relationship between the housings will be described. figure 1 (A) is a front view of a terminal to be operated. figure 1 ...

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Abstract

Embodiments of the present invention are directed to a mobile communication device that includes a plurality of antennas for receiving signals and is configured to reduce the deterioration of the antennas characteristics. In specific embodiments the mobile device is a folding type mobile communication terminal having the structure that permits easy opening or closing and enabling stabilization of the antenna characteristic. In one embodiment, a mobile communication device comprises a plurality of antennas configured to receive signals; a signal processing circuit configured to combine and process the signals received from the plurality of antennas; and a phase alignment circuit provided for each of the plurality of antennas and configured to subject a phase of a signal received by each of the plurality of antennas to an in-phase adjustment.

Description

[0001] Cross References to Related Applications [0002] This application relates to and claims priority from Japanese Patent Application No. 2002-277046, published on September 24, 2002, and Japanese Patent Application No. 2002-316980, published on October 31, 2002, the entire disclosure of which The contents of are hereby incorporated by reference. technical field [0003] The invention relates to a mobile communication terminal having multiple antennas, such as a cellular phone or a personal digital assistant (PDA). Background technique [0004] There has been a proposal of a technique for stabilizing antenna characteristics such as antenna gain or radiation efficiency regardless of whether the terminal is held in the hand, put in a bag, or otherwise (refer to, for example, Japanese Laid-Open Patent Application Publication No. 11-274966). The above-mentioned publication describes using an embedded antenna in addition to the rod antenna in order to stabilize the characte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/32H04M1/02H04B1/40H01Q1/24H01Q3/30H01Q21/28H04B1/38
CPCH01Q21/28H04B1/3838H01Q1/243H01Q3/30H01Q1/244H04B1/40
Inventor 片岸誠高木卓千葉裕粂川真信星野和則
Owner HITACHI LTD
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