| 摘要 |
<p>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.</p> |
