| 摘要 |
A microwave therapy unit for human and veterinary medicine is described, in which the microwave power is generated in a magnetron, as used, in particular, for microwave ovens, and guided via a coaxial line to the microwave applicator and applied by the latter to the biological tissue to be treated. Connected directly to the magnetron, which is designed primarily for waveguide connection, without the interposition of a waveguide transition is a microwave output coupling which employs coaxial technology and, firstly, effects a coaxial impedance step-down transformation of the internal impedance of the magnetron to the characteristic impedance of commercially available coaxial lines with 50 or 60 ohms, and secondly contains a microwave bypass which represents a low impedance for microwave currents of nominal frequency and a high impedance for low-frequency control currents, and thirdly contains a coaxial low-pass filter whose output impedance is matched to the characteristic impedance of conventional coaxial lines with 50 or 60 ohms.
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