The exploitation of high-frequency radio waves for heating substances was made possible by the development of vacuum tube radio transmitters around 1920. By 1930 the application of short waves to heat human tissue had developed into the medical therapy of diathermy. At the 1933 Chicago World's Fair, Westinghouse demonstrated the cooking of foods between two metal plates attached to a 10 kW, 60 MHz shortwave transmitter. The Westinghouse team, led by I. F. Mouromtseff, found that foods like steaks and potatoes could be cooked in minutes.
Frozen dinners, pies, and microwave popcorn bags often contain a susceptor made from thin aluminium film in the packaging or included on a small paper tray. The metal film absorbs microwave energy efficiently and consequently becomes extremely hot and radiates in the infrared, concentrating the heating of oil for popcorn or even browning surfaces of frozen foods. Heating packages or trays containing susceptors are designed for a single use and are then discarded as waste.
In our heat map test, the Toshiba produced the most even heating pattern of all the microwaves we tested, perfectly browning the layer of marshmallows from edge to edge. It expertly cooked a baked potato in about 6 minutes, which was average for the microwaves we tried. It also reheated beverages well and perfectly cooked frozen macaroni and cheese. And it made tasty popcorn, with only 5 grams of kernels left unpopped, which was on a par with most of the models we tested. This model allows you to defrost by time or weight, but like most of the microwaves we tested, it didn’t defrost meat well.
Microwave ovens come in a variety of styles to fit all your home decor needs. It doesn’t matter if we are talking about otr microwaves or countertop microwaves. Some are black stainless steel, others are shiny stainless steel finish for the modern kitchen. If you have retro decor, there is also a retro microwave for you. Many people prefer a stainless steel exterior. It is easy to find the right model that blends right into your kitchen and matches your, espresso machines, food processors, coffee makers, air fryers and other appliances. Many of today’s models can even work with other smart home devices if your home is a smart home.
You’ll find the perfect microwave from our microwaves Black Friday 2019 collection. Treat yourself to a microwave that is outfitted with features you’ll use frequently. There are many different features a microwave can have, including auto defrost, sensor cooking and shortcut keys. Check out our Microwave Buying Guide for more information on each feature and how they can simplify getting dinner on the table.