| 摘要 |
An excitation system structurally compatible with a low profile streamlined microwave oven appliance configuration, comprising a generally planar antenna member disposed between the bottom wall and a support shelf centered laterally in the oven cavity and extending over a substantial portion of the bottom wall. An open peripheral region is defined between the front, back, side and bottom oven cavity walls and the peripheral edge of the antenna member. A plurality of radiating apertures are formed in the antenna member and arranged in a triangular fashion such that straight lines connecting the centers of any three closely adjacent apertures intersect to define an equilateral triangle. Microwave energy is coupled from the magnetron to the center point of the antenna member, whereby microwave energy radiates from the apertures in the antenna member to heat items placed on a support shelf from below and energy propagates between the antenna member and the bottom cavity wall to the periphery of the antenna member from which it is radiated through the peripheral region into the interior of the cavity and reflected by the front, back, side and top cavity walls to the heat items on support shelf from above.
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