【应用】ASB低噪声放大器AST20S-A用在汽车接收天线上，108MHz时的增益为26dB

时间： 2021-12-17 来源：世强

技术问答

汽车接收天线是现在汽车必不可少的一个部件，可以用来接收外部的无线电磁波信号，获取各种信息。随着物联网技术的不断发展，汽车也越来越智能化，需要接收的外部信号也变得越来越复杂。

车载的接收天线一大功能就是对FM信号的接收，来实现接收各种广播的功能，已变成了必不可少的一部分。由于接收的电磁波信号都比较弱又有各种干扰，因此要采用射频前端电路来对接收的信号进行处理。其中低噪声放大器是重要的一环，主要将接收的信号进行放大处理。本文推荐1颗ASB的低噪声放大器AST20S-A用在汽车接收天线的设计中，具有高增益等特点。

图1 AST20S-A电路

ASB的低噪声放大器AST20S-A用在汽车接收天线的设计中，有以下特点：

1、108MHz时，增益为26dB。具有高增益的特点，有利于提高接收灵敏度的设计。

2、108MHz时，噪声系数为0.8dB，具有低噪声系数的特点，有利于降低系统的整体噪声。

3、采用工作电压为5V，有利于电源电路的整体设计。

4、符合AEC-Q100的车规标准，可以满足车载产品上的应用。

5、封装采用SOT363,尺寸为2.1x2.0 mm，具有小封装的特点，有利于节省电路板空间，减小产品尺寸。

综上所述，ASB的低噪声放大器AST20S-A可以满足在汽车接收天线设计中的应用。

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型号- ASF143,ASL55T8,ASF140,ASL51T8,ASL362,ASL360,AWB512,AWG0123E,ASL912,ABX0618Q,ABU2513,ASF150,ABX0618M,ASF153,ASL5543,ABU2516,ASX201,AGN0942D,ASX1436,ASW234,ASX1437,ASW114,ASX1037,AWG1023E,ASL59D4,AHB5614T8,ASX601,ASX602,ASX1037HG,AGN1440,ASL882,AWG0015E,ASL920,ASL425,AWG0117E,ABU1513,AWG3023,ABU1516,AWG3020,AWG1020E,ABU1510,ASL380,AWG0317,AWB578,AWB577,AWB459,AWG0313,ASL09C,ASL51S9,ABU1526,ASL552,ASL550,ASX621,ASX620,ASL390,AWB51D2,AWG1017E,ASX501,AGN1540,AWB51D9,AWB589,AWG3015,ABU1519,AHL5218T8,AWG3017,AGT0510,ASL41S9,ASL53T8,AGT0515,ASW320,ASL560,AWG2716,AWG2719,ASL31C,ASW204,ASX415,AWB312,AWB319,AWB317,AGN0944Q,AGN922,AWG2020,ABB2516,ASX520,ABB2513,AWG0917,ASL5463,ASL330,ASX401,AWG1015E,ASX521,AWG011E,ASW318,AWB31D1,ASX403,ASW313,ASW314,AHB5616T8,ASW316,AWB688,AWB31D7,AWG2023,AWG0120E,AWB31D9,AWB31D2,AWG0023E,ASL54T8,ASL226,ABB1519,AHB3612T8,ABB1516,ASF240,ASX311,ABB1513,ASX0837HG,ABB1510,AHL5318T8,ASL580,ASW220,AHL5220T8,AWG0913,ASL33C,ABB817,AWG2015,AWG0020E,AGN0942Q,AWG2017,ASF133,AGN0994M,ASF255,ASF250,AHB3612S6,ASF130,ABB1526,ASL5563,ASX420,ASX423,ASW212,ASX1536,AGN0944D,ASL590,AWG1715,ASW335,AWG1718,ASW214,ASW338,AHL5216T8

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