A microwave heating system having a combination rotary blower and multiport microwave radiator positioned in a cavity and having radiating ports at different distances from the axis of rotation which direct overlapping radiation patterns at a body to be heated. A combination heater may be used having...http://www.google.com.au/patents/US4335290?utm_source=gb-gplus-sharePatent US4335290 - Microwave oven blower radiator
