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Wireless communication device

A wireless communication device and antenna technology, which is applied in the direction of electrical components, transmission systems, etc., can solve problems such as lowering, weak-field call drop of wireless communication devices, and affecting call quality, etc.

Active Publication Date: 2015-04-29
SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 further decrease, so that the frequency of the signal sent and received by the antenna produce a change, that is, the frequency offset effect
When the frequency offset effect occurs, it will cause weak field call drop in the wireless communication device, which will seriously affect the call quality

Method used

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  • Wireless communication device

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Embodiment Construction

[0011] 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. In this embodiment, the preset working system of the wireless communication device 100 includes GSM900, and the following will further introduce the GSM900 system working in the low frequency band as an example.

[0012] The wireless communication device 100 includes a transmitter 10 , a power amplifier 20 , an RF front-end switch 30 , a voltage divider circuit 40 , an AND gate circuit 50 , a switch 60 , a first matching circuit 70 , a second matching circuit 80 and an antenna 90 .

[0013] The transmitter 10 is used for transmitting radio frequency signals. In addition, the transmitter 10 is also configured to output a corresponding voltage signal V...

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Abstract

The invention provides a wireless communication device. The wireless communication device comprises an antenna, an emitter, a radio frequency front end switch, an AND gate circuit, a change-over switch, a first matching circuit and a second matching circuit, wherein the first matching circuit and the second matching circuit are both electrically connected with the antenna; the radio frequency front end switch is electrically connected with a position between the emitter and the change-over switch; the emitter is used for outputting a voltage signal according to the current signal receiving strength; the radio frequency front end switch is used for judging whether the operation system of the wireless communication device is accordant with the preset operation system or not, and further a high-level signal or a low-level signal is output to the AND gate circuit; the AND gate circuit is provided with a threshold voltage, and the AND gate circuit is used for controlling the electrical connection between the change-over switch and the first matching circuit or between the change-over switch and the second matching circuit. The wireless communication device can be used for effectively improving the performance 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 further decrease, so that the frequency of the signal sent and received by the antenna A change occurs, namely the frequency offset effect. When the frequency offset effect occurs, it will lead to weak-field call drop in the wireless communication device, which seriously affects the call quality. Con...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/40
Inventor 董行王晓冬
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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