"waveguides" - 1 õppematerjal

Liha töötlemine

This is split into two frequency bands: radio ization periods, and cooling of surfaces with frequency and microwave. The first uses air or liquid nitrogen. Penetration depth more typical electrical techniques, with con- depends upon temperature and frequency, ductors, electrodes, etc. The second relies being generally much greater at frozen tem- more on electromagnetic wave technology, peratures and greater at lower frequencies. with waveguides to “beam” the waves into a cavity. Ultrasonic Radio Frequency In some work, ultrasound has been merely used to assist heat transfer during immersion This uses the application of alternating thawing. However, research has shown that electric e.m.f. (3–300 MHz), using elec-