Proximity sensor for about 120-200 cm

I was asked to create a device which would detect a presence of some token (nfc for example) in distance of 120-200 cm - to enable/disable a relay when a person wearing a token or so gets close to the sensor.
However I can read everywhere that NFC operates only to about 30 cm due to a wawelength and antena size...

So what would be a best solution according to your experience?

It cant be a ultrasonic nor IR sensor as the access direction must be anywhere around the sensor, it shall be rather small (no large antena or so) and it will be powered by battery and driven by arduino pro mini/nano. Thanks for any tip /link to such sensor.

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