Is it theoretically possible to engineer manufacture a RFID tag that works within the Bluetooth wavelength range allowing a standard booth-tooth device (a phone for example) to power and pick up data from this specially designed passive tag.
I understand there are bluetooth tags but these have batteries and are not passive nor are they necessarily cheap or small.
I am a novice when it comes to electronics (chemical engineering background) but would like to understand more. If you worked with an actual RFID manufacturer, could you design a passive tag that natively was powered and passed a very small amount of data to a bluetooth device? Data would only need to be transmitted 5-12 inches, keeping the power requirements and footprint small.
I appreciate any feedback! Hopefully my question makes sense!