Questions tagged [magnetron]

A magnetron tube is a metal clad glass tube with a hot cathode in the center which is surrounded by a powerful magnet. It is a low-cost way to generate ~10 GHZ microwaves of high intensity but not a stable frequency. Good for cooking food but no longer used for Radar. The Klystron tube is a much better microwave generator.

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How reflection occuring in antenna fed by transmission line affects performance?

Transmission line considered is lossless. Basically the configuration is simple. For transmitter side : a non ideal source (can be voltage current or power) feeding a transmission line (TL1) with ...
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5answers
716 views

Can a lower voltage overheat a magnetron?

Background I am working on a microwave oven that starts to emit an odor after 2 minutes of full heating despite otherwise working correctly. The smell is the same as that "sweet", ...
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168 views

Drive a magnetron with low power via a CCFL backlight driver

[EDIT] My real question here is: can a magnetron from a microwave oven be used to output low power microwaves? If so, how can I achieve this? If not, what is a source for low power microwaves? In this ...
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201 views

How is it possible that emitting electrons create alternating charges in the cavities of a magnetron?

In a magnetron, electrons are emitted from the cathode and create alternating charges in cavities (fig). These alternating charges produce oscillations in the cavities which result electromagnetic ...
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2answers
147 views

In what pattern does the electrons get emitted from cathode in thermionic emission?

We have structure with an cathode and filament at the center. A cylindrical shaped anode with cavities surrounds the cathode (fig 1). When the cathode get heated the electrons are emitted from cathode ...
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6answers
418 views

Magnetron Working Principle

I was reading this simple description of magnetron working principle. Can you explain me why when electrons go near the cavities, they start to resonate at microwave frequency? I do not see the link ...
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1k views

Microwave oven: How can I temporarily limit the startup load?

Problem: It's a common problem for "NON-inverter" type microwave ovens to pop circuit breakers, and mine is no exception. UPDATE Jan 2021: Extension / power strip added, (mentioned below) ...
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What causes loss of power over lifetime of a magnetron?

The power of a magnetron declines over time\$^1\$. While not noticable for most consumer applications (A 2000-hour lifetime would last over 20 years if the device is used only 15 minutes a day), this ...
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835 views

UHF Tesla coil powered by low voltage?

I want to know if it is possible to use a 2.4 GHz magnetron as a oscillator for a Tesla coil circuit. The idea is to use a oscillating relay-driven step up transformer (12 V to 10 kV) and then charge ...