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Dual channel broadcast receiver and mobile terminal having same

A broadcast receiver and mobile terminal technology, applied in image communication, telephone communication, color TV components, etc.

Inactive Publication Date: 2009-06-03
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, with the circuit configuration of the conventional two-channel broadcast receiver, the absolute gains G2 and G3 of the two antennas of the two-channel broadcast receiver are lower than those of the antenna of the single-channel broadcast receiver having the antenna and the tuner corresponding thereto G1, this is disadvantageous (see Figure 4 )

Method used

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  • Dual channel broadcast receiver and mobile terminal having same
  • Dual channel broadcast receiver and mobile terminal having same
  • Dual channel broadcast receiver and mobile terminal having same

Examples

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Embodiment Construction

[0019] Referring to the drawings, description will be given below of embodiments of the present invention. figure 1 An external view of the two-channel broadcast receiver 100 of the present invention incorporated into a flip-type mobile phone unit is shown.

[0020] The two-channel broadcast receiver 100 of the present invention is composed of a rod antenna 101, an in-case antenna 102, a video processing circuit block (not shown) and an audio processing circuit block mounted on a display side circuit board 103 (not shown), a display 104 for displaying video based on the output from the video processing circuit block and a speaker (not shown) for outputting sound based on the output from the audio processing circuit block, a flat cable 105, an electrical conduction hinge 106 , the two-channel broadcast receiving circuit block 107 installed on the main body side circuit board 108 and the small keyboard 109 constitute. The operation of the two-channel broadcast receiver 100 of ...

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Abstract

A dual channel broadcast receiver includes: a first receiving section having a first antenna, a first low noise amplifier for amplifying a signal received by the first antenna, and a first power divider for dividing a signal fed from the first low noise amplifier into two signals to be outputted therefrom; a second receiving section having a second antenna, a second low noise amplifier for amplifying a signal received by the second antenna, and a second power divider for dividing a signal fed from the second low noise amplifier into two signals to be outputted therefrom; a dual tuner having a first RF input terminal and a second RF input terminal; and a selecting section for, in dual channel reception, selecting and feeding to the first and second RF input terminals either a signal fed from the first receiving section or a signal fed from the second receiving section. The dual channel broadcast receiver does not supply power to an antenna that is not being used.

Description

technical field [0001] The present invention relates to a two-channel broadcast receiver and a mobile terminal such as a cellular telephone unit. Background technique [0002] An example of a digital television receiver and the like usable for a car navigation system is an OFDM (Orthogonal Frequency Division Multiplexing) receiver proposed in Japanese Patent Application Laid-Open No. 2004-274603. The OFDM receiver has a plurality of antennas and a plurality of tuners provided one-to-one to each of the plurality of antennas. In the antenna selection mode for selecting an antenna, an antenna from which a received signal having the strongest signal power can be obtained is selected, and by turning on a switch provided between this selected antenna and a tuner corresponding thereto, and Antenna selection diversity reception is performed by turning off switches provided between other antennas and tuners corresponding thereto. In the sub-carrier selective combining mode for perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/18H04B7/08H04B1/16H04M1/02H04M1/725H04N5/44
CPCH04B7/0831H04B1/3805H04B7/082
Inventor 山口伦史
Owner SHARP KK