Wireless communication device

A wireless communication device and antenna technology, applied in electrical components, transmission systems, etc., can solve the problems of affecting call quality, lowering, weak field call drop of wireless communication devices, etc., achieve performance improvement, optimize matching circuits, and improve signal sending and receiving quality Effect

Inactive Publication Date: 2015-05-20
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Abstract
  • Description
  • Claims
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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 , a radio frequency front-end switch 30 , a comparison circuit 40 , a voltage conversion circuit 50 , a matching circuit 60 , an antenna 70 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 received signal s...

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Abstract

The invention provides a wireless communication device. The wireless communication device comprises an antenna, a transceiver, a comparing circuit, a matching circuit and a variode, wherein the matching circuit is electrically connected with the antenna, the transceiver is used for outputting corresponding voltage signals according to current received signal strength, the comparing circuit is provided with a threshold voltage and outputs a control signal by comparing the voltage signals with the threshold voltage, and the control signal controls capacitance of the variode so as to enable the variode and the matching circuit to jointly provide impedance matching of the antenna.

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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