The magnetron

Magnetron Frequency Twinning

Pulsed magnetron oscillators sometimes show an instability known as “twinning” in which the spectrum shows two, or more, closely spaced peaks. This phenomenon is undesirable and can lead to problems when it occurs in magnetrons used in radars. An experimental investigation of twinning is described from which conclusions are drawn about the design parameters that affect it. It has been shown tha...

A. Magnetron Development

To facilitate the construction of the high-power magnetron, the entire output section, including the quarter wave transformer and window, has been redesigned. The new design is based on standard S band waveguide. The quarter wave transformer was changed to increase the external loading of the tube. Cold test measurements on a tube with the redesigned output section give an external Q of 230. Wo...

Novel waveform for magnetron radar

Magnetron does not lend itself to pulse-compression. To achieve narrow range resolution it must transmit short pulses. For given peak-power, antenna-gain and rotation-rate, increasing energy-on-target can be achieved by increasing the pulse repetition frequency (PRF), which is ordinarily limited by the specified unambiguous range. The proposed pulse-train waveform unties the two. Transmitting t...

Magnetron High Power System Design

This paper describes the design of an X-Band Magnetron to Linear Accelerator (LINAC) High Power Transfer System consisting in an 8 resonant cavities Magnetron connected to a dedicated vacuum Dielectric Window (DW). A main analytical design of devices is shown with compact formulas and is followed by numerical optimization. Electromagnetic and Thermomechanical coupling between these devices is d...

Magnetron Sputter Epitaxy of GaN