| 摘要 |
A subharmonic pumped mixer circuit utilizes quarter wavelength transmission lines at a local oscillator (LO) frequency to provide high radio frequency (RF) to local oscillator (LO) port isolation while allowing the RF and LO ports, as well as an intermediate frequency (IF) port, to be connected directly to a semiconductor switch. A transmission line supressor network connected between the semiconductor switch and the RF port allows operation at any selected even LO harmonic by suppressing response to even harmonics of the LO frequency below the selected harmonic and includes transmission line suppressors which are each a quarter wavelength at the frequency to be suppressed.
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