Microwave/Lasers
 Microwave is the name given to radiated energy with wavelengths of 0.03 - 3 mm. This corresponds to frequencies of 1 - 100 GHz. There are no sharp frequency boundaries between radio waves (RF), microwaves, or infrared (heat related) radiation.
Microwave Devices
Magnetrons and oscillators are microwave devices used to generate microwaves. Traveling-wave tubes and linear beam tubes guide microwaves. Cross-field amplifiers, klystrons, ferrite isolators, circulators, and rotators control or modify microwave propagation. Devices with garnet (microwave ferrite) components in them employ magnets to develop a static bias field in these components. These devices function based on the principle of gyromagnetic resonance, and the atomic dipole moments precess at a frequency proportional to the magnitude of the static field within the microwave ferrite. The microwave ferrite in the waveguide devices then changes the properties, or direction of the energy wave or signal.
Microwave Magnets
 Magnets establish some level of induction in the microwave ferrite inside the cavity by partially magnetizing the ferrite material. Simple plate or disk magnets are frequently used. They are most often attached to the outside surfaces of the device, and the microwave ferrite is placed inside. The magnetic circuit is often 'open' in that there is no yoke connecting the far poles of the two magnets together. Others use several magnets around the outside of the device, in parallel to the ferrite parts. The ends of ferrite and magnets are then connected by a steel plate to form a magnetic circuit that resembles a typical full yoke dipole. The biasing field across the microwave ferrite in these devices is directly proportional to flux density in the gap and the shape of the ferrite. Operating flux density can be adjusted, or tuned, by magnet positioning, shimming, shunting, or stabilizing the magnets.
For further inquiries, please e-mail us at info@dextermag.com -or- call us at: 800-345-4082 (In North America) or +44 (0) 1189 602430 (In Europe).
|