Re: 122GHz Chip Transceiver

Andy G4JNT
 


On Sat, 14 Sep 2019 at 12:20, Andy G4JNT via Groups.Io <andy.g4jnt=gmail.com@groups.io> wrote:
Interesting article in the latest Dubus about a Siliconradar chip used as a transceiver for 122GHz

The chip itself has a VCO (with output at 1.9GHz from an internal  prescaler) , 0.5mW PA , LNA and quadrature downconversion to 0 - 200MHz IF

By adding of a Fract-N synth the chip can be locked and you have a standalone 122GHz transceiver for CW and any modulation  that can be done by changing the frequency .   A modern Fract-N with tiny frequency resolution will allow quite narrow step size.

Downside is, it has separate Tx and Rx antennas so mounting on a dish is problematical.   The chip can be physically shifted between Tx/Rx, or the authors have designed a combiner.

Interesting ....

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