公开(公告)号：US4284868A

公开(公告)日：1981-08-18

申请号：US971727

申请日：1978-12-21

Applicant: James E. Simpson

Inventor： James E. Simpson

IPC: H05B6/72 ,  H05B6/80

CPC classification number: H05B6/725 ,  H05B6/72

Abstract: A microwave oven having a directional rotating antenna axially supported on an axis of one wall of a microwave oven cavity of the microwave oven which provides circularly symmetric uniform energy distribution of microwave energy within the microwave oven cavity and consistent heating of a product in the microwave oven cavity. The directional rotating antenna includes a two-by-two array of antenna elements where each element is an end driven half-wavelength resonating antenna element supported by a length of conductor perpendicular to the wall of the microwave oven cavity. A parallel plate transmission line connects to each of the supports, four of which join at a junction which connects to a cylindrical probe antenna. The probe antenna is excited by microwave frequency currents of a waveguide adjacent to the wall of the microwave oven cavity. The directional antenna is rotated by a moving stream of air circulated through the microwave oven cavity. A dome having a flattened conical shape extending outwardly in the wall of the microwave oven cavity provides a nearly circular recess partially surrounding the directional rotating antenna and provides uniform energy distribution in the product being heated. The dome returns microwave energy reflected from the product towards a circular area in the middle area of the microwave oven cavity. A transition section extends between the top of the dome and the one wall of the microwave oven cavity. The waveguide including three sides affixes to the outside wall of the dome, the transition section, and an extension of the wall extending beyond the microwave oven cavity which supports the microwave power source, all of which comprise the fourth wall of the waveguide. The microwave oven provides a consistent cooking pattern, especially for sensitive foods by utilizing high power of the microwave power source.

Abstract translation: 一种微波炉，其具有定向旋转天线，其轴向支撑在微波炉的微波炉腔的一个壁的轴线上，其提供微波炉腔内的微波能量的圆周对称均匀能量分布，并且在微波炉中一致地加热产品 腔。 定向旋转天线包括两乘二阵列的天线元件，其中每个元件是由垂直于微波炉腔的壁的导体长度支撑的端部驱动的半波长谐振天线元件。 平行板传输线连接到每个支撑件，其中四个连接在连接到圆柱形探头天线的连接处。 探头天线由与微波炉腔壁相邻的波导的微波频率电流激发。 定向天线由循环通过微波炉腔的空气流动旋转。 具有在微波炉腔壁的外部向外延伸的扁平圆锥形的圆顶部提供部分围绕定向旋转天线的近似圆形的凹部，并且在被加热的产品中提供均匀的能量分布。 圆顶将产品反射的微波能量返回到微波炉腔中部的圆形区域。 过渡部分在圆顶的顶部和微波炉腔的一个壁之间延伸。 包括三个侧面的波导固定在圆顶的外壁，过渡部分和延伸超过支撑微波功率源的微波炉腔体的壁的延伸部分，所有微波功率源都包括波导的第四壁。 微波炉提供了一致的烹饪模式，特别是通过利用微波功率的大功率敏感食品。