This circuit was found in a 1967 General Electric documentation. Tunnel diodes can oscillate at very high frequencies. These are not currently easy to obtain components.
This circuit was obtained in the Philips integrated circuits manual of 1990. The indicated power is...
This converter for the 150 MHz band was found in an American documentation. Transistors are...
This circuit simply triggers an LED when the sensor is activated. The circuit is from a Popular...