Variable gain power amplifier for multi-channel self-adapted matching network

Abstract

The invention discloses a multichannel self-adaptive matching network power amplifier with variable gain, which comprises a state controller, an input matching network, a multichannel power amplifier module with variable gain and an output matching network. The power amplifier adjusts impedance matching networks of the input matching network and the output matching network. The state controller provides a matching selection signal to be used for adjusting the input matching network and the output matching network for various application so as to obtain high linearity and low power consumption. Power amplifier units of the multichannel power amplifier module with variable gain respectively have different saturation output powers. Based on a channel selection signal provided by the state controller, one of the power amplifier units is in operation; therefore, comparatively high efficiency can be obtained in two modes of a mode of comparatively high output power and a mode of comparatively low output power. In quite wide range of the output power, the transmission efficiency of the signals can be improved. The power amplifier of the invention can be applied to various application occasions and have good performance parameters, compared with the existing power amplifier.

Description

technical field [0001] The invention relates to the fields of wireless local area networks and radio frequency integrated circuits, in particular to a multi-channel self-adaptive matching network variable gain power amplifier, which is especially suitable for radio frequency front-end transmitters of various wireless network system-on-chips. Background technique [0002] In order to improve the utilization rate of frequency spectrum, modern communication technology generally adopts the technology of simultaneous amplitude modulation and phase modulation; in addition, it is necessary to prevent mutual interference between different communication systems and crosstalk between adjacent channels in this system. Therefore, the PA (power amplifier) ​​must have good linear characteristics; based on the mobile requirements of communication, the PA should have the highest possible power efficiency. In a radio frequency transceiver, the power amplifier is an extremely important part, ...

AI Technical Summary

Problems solved by technology

But the shortcomings of existence are: first, the article only selects two modes: low output power and high output power mode

Second, the linear amplification of the signal cannot be achieved

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