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    • 79. 发明公开
    • Finline millimeter wave detector
    • 精密微米波检测器
    • EP0245048A3
    • 1988-10-05
    • EP87303936
    • 1987-05-01
    • Hewlett-Packard Company
    • Upham, Herbert L.
    • H03D09/06
    • H03D9/0641H03D9/02H03D9/0633
    • A finline detector (100 or 110) comprises a dielectric substrate-mounted circuit disposed within a millimeter waveguide, said substrate circuit comprising a substrate (114) with a diode (224) mounted thereon in series with the waveguide (16). The mounting of a diode (224), which may have a characteristic impedance substantially lower than the characteristic impedance of a realizable finline, in series with the waveguide transmission line minimizes sensitivity to the high capacitance and therefore low impedance realizable with such a detection diode. Furthermore, the transmission line may be terminated more easily in a wideband termination (50), thus increasing the effective bandwidth of operation of the detector. Two representative embodiments of the invention are, for example, an unbalanced detector (100) and a balanced detector (110). Each embodiment includes a detection device, namely a diode (224, 324), coupled in series with the finline transmission line (101). Capacitance means (34,134,36,136,38,138) are also provided.