Thursday, October 6, 2022


Hand-held microwave fits in backpack!

By Bob Difley

Flicking on a gas burner or building a fire might be the most common way of cooking in the great outdoors, but another option is on the way. The Wayv Adventurer is a battery-operated radio frequency cooking appliance that’s small enough to fit in a backpack. In other words, it’s a hand-held microwave.

Handheld microwaveWayv produced the Adventurer in partnership with NXP Semiconductors, having raised £150,000 of funds for its development via a 2014 Crowdcube crowdfunding campaign. It is designed to heat food and drink anywhere, while being compact, rugged and lightweight. It can be also be used in areas where having a lit flame is banned.

The Adventurer was conceived for use by military personnel and adventurers, but it can be used when you’re simply out hiking or fishing, or even in workplaces or cabins where there are no cooking facilities. Between 100 ml (3.4 fl oz) and 500 ml (16.9 fl oz) of food or drink can be heated in the unit.

Power is provided by interchangeable quick-charging li-ion batteries, which can be charged from in-car sockets or solar chargers as well as via AC power. A full charge will provide about 30 minutes cooking time (up to six cycles of heating for food or drink).

It measures 305 x 128 mm (12 x 5 in)and weighs in at just 1.2 kg (2.6 lb). This means it will fit easily in a backpack. Simple controls on the top of the unit include start, stop, backlight and time adjustment buttons, as well as a digital display.

Unlike the vacuum tubes used in conventional microwave ovens, the Adventurer uses technology developed for RF amplifiers in cellphone towers – laterally diffused metal oxide semiconductors (LDMOS) transistors – to generate its 250 W of power. This is what makes the design so compact and lightweight, and it also enables food to be heated evenly without the need for a turntable.

The Adventurer should land sometime next year at a cost of US$199. Check it out on the Wayv website.

You can find Bob Difley’s RVing ebooks on Amazon Kindle.

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Bob Difley
6 years ago

Actually, Dutchman, I wouldn’t know, but the Engineer Guy in an article on his website states: “Inevitably, tiny transistors and microchips replaced clunky vacuum tubes, but it’s too soon to relegate them to the museum. Microchips can’t easily replace tubes for producing power. For example, in heating food.

Now, a microwave contains three main components: A vacuum tube called a magnetron – it generates the energy that heats food. A waveguide hidden in the wall to direct that energy to the food, and a chamber to hold the food and safely contain the microwave radiation.”

You can read more on this heated topic on the Engineer Guy’s website.

6 years ago

Conventional MW ovens do not use vacuum tubes. They use high voltage magnetrons…