Questions tagged [microwaves]

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Can air be ionized using microwaves?

I have been doing a good bit of research lately into a new form of electric "jet engine" developed by researchers in Wuhan, China; in the article summarizing the technologies used to produce ...
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1answer
1k views

What are the materials most transparent to microwaves?

I need to build special equipment for a microwave oven ( 2.45 (GHz)). But even glass and plastics do heat up in microwave ovens. Where can I find a list of the materials that are the most transparent ...
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0answers
32 views

Homogeneous magnetic field inside aperture of PCB

I need to create a homogeneous magnetic field of a certain strength across a 10mm diameter opening of a PCB by using a current track on said PCB around the opening. The signal sent through the ...
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0answers
212 views

Please explain this flatbed microwave design

Here is a Galantz flatbed microwave The waveguide is smaller than a wavelength. 1)Usually apertures of less than a wavelength are considered to block EM wave but not here, why ? 2)The width of the ...
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0answers
12 views

In a rectangular waveguide, how can one determine if any propagation modes exist?

I'm currently studying microwave engineering, and I came across the query mentioned above. I know that rectangular waveguides use TE(m,n),TE and TM modes, but I do not understand how these modes came ...
-1
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1answer
113 views

What is the plastic cover thing for in microwave ovens?

With every microwave oven I have ever had, it has come with a plastic thing that you are (apparently) supposed to put over the food when microwaving it. Some food products mention this and tell you ...