Re: 122GHz Chip Transceiver
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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.
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