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

A low-noise amplifier and low-noise amplification technology, applied in the field of wireless communication systems, to achieve the effects of small noise figure, impedance matching, and good frequency band matching

Inactive Publication Date: 2015-12-09
ZHUZHOU TIANWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment 1

[0072] by attaching figure 1 It can be seen that the present invention relates to a multi-band low-noise amplifier. The multi-band low-noise amplifier circuit uses two input terminals 11 and 21. The two input terminals 11 and 21 are respectively two different frequency bands, and one is a high-frequency band. One is the low-frequency band, and at the same time, there are inductors, capacitors and transistors at each input end. The input impedance of the inductors, capacitors, and transistors together form an input series matching network, and a variable capacitance element is set in the circuit. By tuning The variable capacitance element in the input matching network enables the amplifier to work in multiple different frequency bands. At the same time, two resonant networks are connected in parallel to increase the gain and expand the bandwidth; in multiple frequency bands, a smaller noise figure and a higher Gain, and achieve input and output 50Ω impedance matching in multip...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/26H03F3/45
Inventor 韩琪
Owner ZHUZHOU TIANWEI TECH CO LTD
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