I Estimated about 15 to 25 inches
The first microwave, the Radarange, weighed around 340 kilograms (750 pounds) and stood over six feet tall.
The first microwave oven was built in 1945, as a proof of concept, by Percy Spencer.
The C-Max Microwave Oven has 1200 watts of power which I believe is the most power of any microwave oven.
The first commercial microwave was invented by Dr. Percy Spencer in 1946.
The main limitation of a sold state microwave device is its surroundings. The microwave tower needs to be tall enough to overcome trees and other objects getting in the way of transmission.
An employee of Raytheon, Dr. Percy Spencer, invented the microwave. The company improved on the design and eventually sold the first microwave.
No
Percy Spencer, an engineer for Raytheon, invented the microwave oven in the early 40s. Raytheon patented it in 1945 and began marketing the Radarange in 1947. The Radarange was six feet tall, weighed 750 pounds, and cost $5,000 ... and didn't sell particularly well.
Percy Spencer
America
Radarange, from 1947.
Assuming you are referring to microwave ovens, Raytheon Co. of the United States filed the patent for the microwave cooking process on 8 October 1945. The first microwave oven model available for sale to the public was the Radarange, which cost the equivalent of about 50,000 2013 US dollars in 1947.