Multi-band low-noise amplification method and multi-band low-noise amplifier

Abstract

The invention provides a multi-band low-noise amplification method and a multi-band low-noise amplifier. A multi-band low-noise amplifier circuit adopts two input terminals which respectively belong to two different bands (a high band and a low band); an inductor, capacitors and a transistor are arranged at each input terminal; the inductor, the capacitors and the input impedance of the transistor together form an input-series matching network; variable-capacitance elements are arranged in the multi-band low-noise amplifier circuit. Through tuning of the variable-capacitance elements in the input matching networks, the amplifier can work at a plurality of different bands; meanwhile, two resonance networks are connected in parallel to improve the gain and broaden the bandwidth; a relatively small noise factor and a relatively high gain can be achieved within multiple bands, and input-output 50 omega impedance matching is realized within multiple bands.

Description

technical field [0001] The invention relates to an electronic component and a working method thereof, in particular to a low-noise amplifier applied to a multi-mode multi-band wireless communication system and a low-noise amplifier method thereof, belonging to the technical field of wireless communication systems. Background technique: [0002] At present, an important trend in the development of mobile communication is that a single communication terminal can be compatible with multiple communication standards, such as the widely used third-generation (3G) cellular mobile communication system and Bluetooth (Bluetooth) or Wireless Local Area Networks (Wireless Local Area Networks, WLAN) and other wireless The integration of communication systems is a typical case. Therefore, the realization of a high-performance multi-band compatible receiving module will significantly reduce the cost of multi-module assembly for the integrated system of these multiple communication modes, ...

AI Technical Summary

Problems solved by technology

[0017] The object of the present invention is to propose a new multi-band low-noise amplifier and its multi-band low-noise amplifier for the deficiencies in the existing multi-band low-noise amplifier Method, the multi-band low noise amplifier and its multi-band low noise amplification method can effectively realize a multi-band low noise amplifier, which can work in multiple frequency bands in a wide input frequency range, so that it can be applied to multi-mode Multi-band communication system, and can improve the technical indicators of noise figure, gain, input and output matching to a certain extent