Impedance matching method and device
A matching method and matching device technology, applied to devices, antennas, electrical components, etc. that enable antennas to work in different bands at the same time, can solve the problems of short battery life and high power consumption, and achieve extended use time and reduced power consumption. consumption effect
Inactive Publication Date: 2019-02-05
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
[0004] Embodiments of the present invention provide an impedance matching method and device to solve the technical problems of relatively large power consumption and relatively short battery life in existing impedance matching methods
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
[0023] Please refer to figure 1 , figure 1 It is a flow chart of the impedance matching method provided by Embodiment 1 of the present invention.
[0024] The impedance matching method of this preferred embodiment includes:
[0025] Step S101, acquiring at least two initial impedances of the antenna in a passive state.
[0026] For example, when the terminal is not connected to an access point (Access Point, AP), at least two impedances of the antenna are obtained by debugg...
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The invention provides an impedance matching method and apparatus. The impedance matching method comprises the steps of obtaining at least two initial impedances of an antenna in a passive state; when the antenna is in an active state, obtaining first radio frequency power consumption of a terminal corresponding to the antenna at each initial impedance; according to the first radio frequency power consumption, determining a target impedance of the antenna in the initial impedance, the target impedance being used for matching an output impedance of a radio frequency power amplifier with the current impedance of the antenna; and adjusting the current impedance of the antenna to the target impedance. The impedance matching method and apparatus in the invention obtain, based on the impedances of the antenna in the passive state, the radio frequency power consumption of the terminal in an active state and obtain the impedance through the radio frequency power consumption, so that the output impedance of the radio frequency power amplifier is matched with the impedance of the antenna, thereby reducing the power consumption and extending the battery life.
Description
technical field [0001] The present invention relates to the technical field of terminals, in particular to an impedance matching method and device. Background technique [0002] In the existing radio frequency technology, when the antenna form is fixed, the loadpull (load pull) position of the antenna is basically fixed, and the load pull position is used to determine the impedance of the antenna, but through tuning devices (such as RF1117, RF1118, SPXT switch like RF1119) can adjust the loadpull position of the antenna, that is, adjust the impedance of the antenna. When the output impedance of the RF power amplifier is inconsistent with the actual impedance of the antenna (that is, mismatch), it will cause the reflection of the RF signal to increase, thereby losing more RF transmission power and increasing the output current. [0003] Since the antenna is often adjusted according to the position of the standing wave to adjust the antenna matching, in order to achieve the h...
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IPC IPC(8): H01Q5/335
CPCH01Q5/335
Inventor 巫国平
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD