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Wireless communication circuit and its impedance adjustment method

A wireless communication and impedance adjustment technology, applied in wireless communication, electrical components, current supply devices, etc., can solve the problems of power amplifier current consumption and radio frequency performance change or degradation, short battery life, high current consumption, etc., to achieve optimization Current consumption and/or other properties, the effect of extending battery life

Inactive Publication Date: 2017-01-11
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] 3G / 4G mobile phones usually have high current consumption (power consumption), resulting in shorter battery life compared to other phones
However, in reality, the load (impedance) of the transmitting end is time-variant under wireless conditions, and when the user holds the phone at different positions, the current consumption of the power amplifier and the RF performance (such as output power level or signal quality) may change or degrade
In addition, for different power amplifiers, different receiver frequencies and different power amplifier output power, the power amplifier load with the best current consumption and RF performance will be different from 50ohm

Method used

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  • Wireless communication circuit and its impedance adjustment method
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  • Wireless communication circuit and its impedance adjustment method

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Embodiment Construction

[0016] Certain terms are used in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" and "comprises" mentioned throughout the description and claims are open-ended terms, so they should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. In addition, the term "coupled" includes any direct and indirect electrical connection means. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device may be direct...

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Abstract

A wireless communications circuit includes: a transceiver; a power amplifier module including a plurality of power amplifiers coupled to the transceiver; a filter module, including a plurality of filters coupled to the power amplifier module; an antenna switching module coupled between the filter module and an antenna; a tunable matching network coupled between the antenna and the antenna switching module; and a baseband circuit coupled to the tunable matching network. The baseband circuit is used for generating a control signal to the tunable matching network to adjust an impedance of the tunable matching network, wherein the impedance of the tunable matching network is adjusted to be different values under different operating conditions of the wireless communications circuit.

Description

technical field [0001] The present invention relates to the improvement of power consumption in mobile communication devices, and more particularly relates to wireless communication circuits and impedance adjustment methods thereof. Background technique [0002] 3G / 4G mobile phones usually have high current consumption (power consumption), resulting in a short battery life compared to other phones. Improvements in current consumption and RF performance contribute to a better user experience. [0003] A front end circuit of a 3G / 4G mobile phone includes at least one transceiver, a power amplifier (Power Amplifier, PA), a filter and an antenna. Currently, there are three common schemes for reducing current consumption: an averaging power tracking method, an envelope tracking method, and an optimized load method. The average power tracking method reduces the supply voltage of the power amplifier to improve the efficiency of the power amplifier. The advantages of this method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/73
CPCH04W52/0261Y02D30/70H03G3/20
Inventor 刘伟正蔡俊任康庭维
Owner MEDIATEK INC