Optimization of dielectric microwave heating by moving radiator

Finite Element Analysis of Mode Stirrer Impact on Electric Field Uniformity in a Microwave Applicator

“…[7,[16][17][18] The second, which is more relevant to our work, is based on increasing or changing coordinates of nodes and antinodes of the EM field. [13] To accomplish this we can use several techniques: a) to increase the number of waveguide ports in an applicator; b) to use a combination of different sources of EM with different frequencies, for instance to combine MWs with infrared or convective heating [19][20][21][22] ; c) to vary frequency of MWs [11,23] ; d) to use a moveable source of MWs [24] ; and e) to install EM field mode stirrers inside the applicator. [25] Mode stirrers are devices that mechanically change reflection conditions (geometrical configuration) as they move during the application of MWs.…”

Effects of Magnetron Arrangement and Power Combination of Microwave on Drying Uniformity of Carrot

“…[1,20,23] Therefore, drying uniformity using different magnetrons varied and it also varied according to whether the sample was placed at the upper layer or the lower layer. [1,24,25] However, in the present study, the dried carrots had a poor appearance, and some were obviously charred.…”

Effect of the Inside Placement of Electrically Conductive Beads on Electric Field Uniformity in a Microwave Applicator

“…[10,11] The EM field distribution in the cavity depends on its geometry as well as the physical and dielectric properties of the materials subjected to the MW field. [12][13][14][15] In the literature, many methods have been proposed to improve uniformity of the electromagnetic field distribution; e.g., by changing microwave frequency, [16] using mode stirrers, [17][18][19] increasing the number of microwave feed ports suitably distributed, [20,21] using pulsed microwave heating, [22,23] using a moving microwave radiator, [24] combining microwave and infrared irradiation, [25][26][27] and fluidizing electrically conductive beads inside the microwave cavity jacket walls. [28] Li et al [10] have given an evaluative overview on various issues related to uneven microwave heating.…”