MGA-31189-TR1G

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RF Amplifiers

RF amplifiers can be used for numerous applications, but the most common purpose is to amplify signals. The MGA-31189-TR1G is one of the many RF amplifiers that specializes in achieving high power gain in relatively small form factors. The MGA-31189-TR1G has been designed for specific applications and its working principles allow it to be highly effective.

Application Field

The MGA-31189-TR1G RF amplifier is commonly used in Wireless Local Area Network (WLAN) systems, such as IEEE 802.11n/ac 2.4GHz WLAN. It utilizes a high linearity design and is optimized for use with the Qorvo QPF2816 and QPF2820 WLAN Power Amplifiers. This amplifier is also ideal for use in applications such as: Direct Sequence Spread Spectrum (DSSS) and 802.11g OFDM, as it provides excellent linearity and power efficiency, while having an output power of 20dBm.

Working Principle

The MGA-31189-TR1G utilizes a low noise MMIC amplifier to achieve its high linearity and power efficiency. This amplifier utilizes an input transistor, active bias circuit, and push-pull output transistor to achieve its linearity, and power efficiency is increased by a shielded inductor and RF current sensor. The RF current sensor also helps maintain the current limiting of the output transistors, which in turn reduces the power loss. The amplifier also utilizes a carefully optimized topology to reduce the input signal distortion and minimize the P1 dB compression point

The entire amplifier is sealed in a miniature 8-pin surface mount package, making it ideal for portable applications. The performance specifications for the MGA-31189-TR1G include a gain of 17dB and a noise figure of 4.5dB. The amplifier also has a maximum input power of +20dBm, and a minimum output power of +20dBm.

Conclusion

The MGA-31189-TR1G RF amplifier is a highly efficient and effective amplifier designed for WLAN applications. Its features and design principles make it an ideal choice for applications such as direct sequence spread spectrum and 802.11g OFDM, as it provides excellent linearity and power efficiency while maintaining a maximum output power of 20dBm. It has a very small form factor and is sealed in a 8-pin surface mount package which makes it ideal for portable applications.

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