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Wireless communication device

A technology for wireless communication devices and voltage signals, applied in electrical components, transmission systems, etc., can solve problems such as affecting call quality, degradation, and call drop in weak fields of wireless communication devices, improving signal transmission and reception quality, optimizing matching circuits, and performance. boosted effect

Inactive Publication Date: 2015-05-20
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] At present, the difficulty in antenna design of wireless communication devices lies in the bandwidth of the low frequency band. For example, for the GSM900 system of the low frequency band, it is usually difficult to cover the bandwidth of 880-960MHz
Moreover, when the wireless communication device is in a weak field, such as in the basement or when the user holds the wireless communication device, the value of its Received Signal Strength Indication (RSSI) will decrease, and the wireless communication device is prone to weak field drop. Calls and other phenomena seriously affect the call quality

Method used

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Embodiment Construction

[0010] see figure 1 , a preferred embodiment of the present invention provides a wireless communication device 100, which can be a mobile phone, a personal digital assistant (PDA), a tablet computer, and the like. The wireless communication device 100 can work in different systems, such as GSM850 / 900 / 1800 / 1900 and WCDMA900 / 2100.

[0011] The wireless communication device 100 includes a transceiver 10 , a power amplifier 20 , an RF front-end switch 30 , a voltage divider circuit 40 , an AND gate circuit 50 , a voltage conversion circuit 60 , a matching circuit 70 , an antenna 80 and a varactor diode VD.

[0012] The transceiver 10 is used for transmitting radio frequency signals. In addition, the transceiver 10 is also configured to output a corresponding voltage signal Vramp according to the current received signal strength RSSI of the wireless communication device 100 . In this embodiment, the voltage of the voltage signal Vramp is inversely proportional to the value of the...

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Abstract

The invention provides a wireless communication device. The wireless communication device comprises an antenna, a transceiver, a radio frequency front end switch, an AND gate circuit, a match circuit and a variode. The match circuit is electrically connected with the antenna. The radio frequency front end switch is electrically connected between the transceiver and the match circuit. The transceiver is used for outputting a corresponding voltage signal according to current received signal strength. The radio frequency front end switch is used for judging whether a current work system of the wireless communication device is consistent with a preset work system, and outputting a corresponding control signal to the AND gate circuit according to a judgment result. The AND gate circuit is used for controlling the variode to change the capacitance to the match circuit when the voltage signal is greater than a preset voltage and the current work system of the wireless communication device is the preset work system.

Description

technical field [0001] The invention relates to a wireless communication device, in particular to a wireless communication device capable of improving the quality of low-frequency signal transmission and reception. Background technique [0002] At present, the difficulty in designing antennas for wireless communication devices lies in the low-band bandwidth. For example, for the low-band GSM900 system, it is usually difficult to cover the bandwidth of 880-960 MHz. Moreover, when the wireless communication device is in a weak field, such as in the basement or when the user holds the wireless communication device, the value of its Received Signal Strength Indication (RSSI) will decrease, and the wireless communication device is prone to weak field drop. Calls and other phenomena seriously affect the call quality. Contents of the invention [0003] In view of the above, it is necessary to provide a wireless communication device capable of improving the quality of low-frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40
Inventor 董行
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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