A magnetron is a vacuum tube that generates microwave energy through the interaction of electrons with a static magnetic field. Electrons emitted from a central cathode are deflected by the magnetic field and interact with resonant cavities arranged around the anode, producing microwave oscillations. Magnetrons are used in industrial microwave heating, microwave ovens, radar systems, and medical linear accelerators.

What is the difference between a CW magnetron and a pulse magnetron?

A CW (continuous wave) magnetron generates microwave power continuously at a lower, sustained power level (typically up to a few kilowatts). It is used in industrial heating and scientific applications. A pulse magnetron generates very high peak power in short bursts (microseconds), with much lower average power. Pulse magnetrons are primarily used in radar and navigation systems where very high peak power enables long-range detection.

What is the YJ1600 magnetron used for?

The YJ1600 is an S-band CW (continuous wave) magnetron operating at approximately 2.45 GHz with 1.5 kW output power. It is used in industrial microwave heating systems, scientific research equipment, and laboratory applications requiring continuous microwave power at S-band frequencies.

Where can I buy a replacement magnetron?

PartnerTubes (partnertubes.com) supplies magnetrons worldwide, including CW and pulse types for industrial, medical, and radar applications. Contact info@partnertubes.com or call +31 (0) 50 711 0348 to request a quote or check availability for your specific part number.

What magnetrons are used in medical linear accelerators (linacs)?

Medical linear accelerators use high-power S-band or X-band magnetrons typically operating at 2856 MHz (S-band) or 9300 MHz (X-band) to generate microwave energy that accelerates electrons for cancer radiation therapy. Common types include magnetrons in the 1–6 MW peak power range. PartnerTubes can source magnetrons for Varian, Elekta, Siemens, and other medical linac brands.

Product Category

Magnetrons

CW and pulse magnetrons for industrial microwave heating, medical linear accelerators, radar navigation, and scientific research. Stocking 200+ types with global shipping.

What Is a Magnetron?

A magnetron is a high-power vacuum tube that generates microwave electromagnetic radiation through the interaction of an electron stream with a magnetic field. At its core, a magnetron consists of a cylindrical cathode surrounded by a cylindrical anode block containing resonant cavities. When electrons emitted by the heated cathode are subjected to the crossed electric and magnetic fields, they follow cycloidal paths and excite microwave oscillations in the resonant cavity structure.

Magnetrons are among the most energy-efficient microwave power sources available, offering conversion efficiencies of 60–85% in practical devices. This makes them the preferred choice wherever high RF power output and energy efficiency matter.

Types of Magnetrons

CW (Continuous Wave) Magnetrons

Continuous wave magnetrons generate microwave power at a sustained, constant level. They operate at relatively lower peak powers but deliver power continuously, making them ideal for:

Industrial microwave heating (food processing, drying, vulcanizing)
Scientific research and plasma generation
Medical diathermy equipment
ISM-band (2.45 GHz, 5.8 GHz) applications

Pulse Magnetrons

Pulse magnetrons deliver extremely high peak power in short microsecond bursts. The ratio of peak power to average power (duty cycle) can be as high as 1000:1. This makes them essential for:

Marine and air traffic radar
Military radar and electronic countermeasures
Weather radar systems
Distance measurement and navigation

Medical Magnetrons

Medical linear accelerators (linacs) use specialized S-band (2856 MHz) or X-band (9300 MHz) magnetrons to generate the microwave power needed to accelerate electrons for cancer radiation therapy. These devices require extreme reliability and tight performance specifications. PartnerTubes sources magnetrons compatible with Varian, Elekta, Accuray, and Siemens medical linac platforms.

Featured Magnetron Models

Magnetron models with key specifications
Part Number	Type	Frequency Band	Power	Mode	Key Application
YJ1600	Magnetron	S-band (~2.45 GHz)	1.5 kW	CW	Industrial heating, scientific
M1568BS	Magnetron	Radar band	High peak power	Pulsed	Radar, navigation
TH3077	Magnetron (TESLA)	S-band (2.9–3.1 GHz)	High peak power	Pulsed	Radar, fire control
MI99A	Magnetron (Soviet)	X-band	High peak power	Pulsed	Radar, navigation
MI158	Magnetron (Soviet)	X-band	High peak power	Pulsed	Marine / airborne radar
MI29 / MI184 / MI215	Magnetron (Soviet)	S / X-band	High peak power	Pulsed	Military radar systems
CKM99	Magnetron (Soviet)	X-band	High peak power	Pulsed	Radar, fire control
Medical S-band	Linac Magnetron	S-band (2856 MHz)	1–6 MW peak	Pulsed	Medical linac (Varian, Elekta)
Medical X-band	Linac Magnetron	X-band (9300 MHz)	High peak	Pulsed	Compact medical linac
Custom / Cross-ref	All types	S, C, X, Ku bands	On request	CW or pulse	Industrial, defense, medical

Don't see your part number? Contact us — we cross-reference 10,000+ tube types.

Applications by Industry

Industrial Heating

Microwave drying, rubber vulcanization, food processing, and plasma generation using CW magnetrons at 2.45 GHz or 5.8 GHz.

Medical Linacs

S-band and X-band magnetrons for electron linear accelerators used in cancer radiation therapy — the most demanding reliability application.

Marine Radar

Pulse magnetrons for ship navigation radar (9 GHz X-band), providing reliable clutter discrimination and target detection at sea.

Weather Radar

High-power S-band and C-band pulse magnetrons for meteorological radar with long detection ranges and Doppler capability.

Airport Surveillance

L-band and S-band magnetrons for terminal and approach radar used in civil aviation traffic control.

Scientific Research

CW magnetrons for plasma physics experiments, materials research, particle injection systems, and cyclotron ion sources.

Frequently Asked Questions

What is a magnetron and how does it work?

A magnetron is a crossed-field vacuum tube that converts DC electrical energy into microwave RF energy. Electrons emitted from a hot cathode are deflected by a permanent magnet into cycloidal paths. As they orbit between the cathode and anode, the electrons excite resonant cavity structures in the anode block, producing high-frequency microwave oscillations that are extracted via an antenna or waveguide port.

What frequency do magnetrons operate at?

Magnetrons operate across multiple frequency bands: S-band (2–4 GHz, including the industrial ISM frequency of 2.45 GHz), C-band (4–8 GHz), X-band (8–12 GHz, including marine radar at 9.3–9.5 GHz), and Ku-band (12–18 GHz). The most common frequencies are 2.45 GHz (ISM industrial/microwave oven), 9 GHz (marine radar), and 2856 MHz (medical linear accelerators).

How long does a magnetron last?

Magnetron lifetime depends heavily on application and operating conditions. Industrial CW magnetrons typically last 3,000–8,000 hours before output power drops significantly. Medical linac magnetrons have design lives of 2,000–5,000 hours. Pulse magnetrons in radar applications can last 1,000–10,000 hours depending on duty cycle and peak power. PartnerTubes supplies high-quality replacement magnetrons and can advise on expected service life for your specific application.

Can PartnerTubes cross-reference magnetrons to equivalent types?

Yes. Our technical team maintains a comprehensive cross-reference database covering thousands of magnetron part numbers from manufacturers including Hitachi, Panasonic, NEC, Toshiba, Thales, CPI, and others. If you have a part number, serial number, or equipment model, we can identify compatible replacement options and advise on direct substitutions versus functional equivalents.

Do you supply magnetrons for Varian and Elekta medical linacs?

Yes. PartnerTubes sources and supplies magnetrons compatible with Varian (Clinac, TrueBeam), Elekta (Synergy, Versa HD), Accuray, and Siemens medical linear accelerator platforms. Contact our team with your equipment model and we will identify the correct magnetron specification and availability.