| 摘要 |
1277942 Radar SOC DE FABRICATION D'INSTRUMENTS DE MESURE 18 July 1969 [18 July 1968] 36246/69 Heading H4D The Specification describes a CW Doppler radar, of the type comprising an oscillating diode 8 acting as a solid state microwave source within a resonant cavity 9 communicating with a transmit/receive antenna 11, wherein said diode also acts as a receiver mixer producing at its output, across a biasing resistor 14 thereof of value 100 to 500 ohms, the Doppler frequency signals. A preferable range of biasing resistor values is 250 to 350 ohms with a best value of 330 ohms. The diode may comprise a Gunn effect element or an avalanche effect diode. A tuning plunger 13 may be provided as a waveguide 10 coupling the cavity and antenna. |
