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LNA for LORAN

Does anyone know what to use as an amplifier coming from an antenna for a LORAN system?  The frequency is only 100KHz.  The only RF amplifier that might work is the ADL5530, but I'm not 100% sure.  Would an op-amp be better suited here?  If so, which one or how do you choose?

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  • AD8353 and AD8354 is specified to operate down to 1 MHz. It can go lower than this. It's just a question of increasing the ac-coupling caps. There is a discussion of this in the apps section of the datasheet along with a plot showing operation down to 300 KHz.

    A low noise op-amp would also work. However, the addition of 50 ohms resistors at the input and output to properly match the device will drive up the noise figure.

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  • AD8353 and AD8354 is specified to operate down to 1 MHz. It can go lower than this. It's just a question of increasing the ac-coupling caps. There is a discussion of this in the apps section of the datasheet along with a plot showing operation down to 300 KHz.

    A low noise op-amp would also work. However, the addition of 50 ohms resistors at the input and output to properly match the device will drive up the noise figure.

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