| 摘要 |
Microwave harmonic mixer circuit of SQUID(Superconducting Quantum Interference Device) is disclosed, in which a magnetic flux to voltage conversion characteristics of SQUID is used for generating a higher harmonics from an LO(Local Oscillator) signal, and mixing the higher LO harmonics with a radio frequency(RF) signal, including an SQUID for adding a RF(Radio Frequency) signal to a magnetic flux of an LO(Local Oscillator) signal frequency for having a mixing of the frequencies done; a current applying part and a grounding part disposed on both sides of the SQUID and connected to a current source on one side and grounded on the other side respectively for supplying operation current to the SQUID; RF antenna parts one each disposed between the SQUID and the current applying part and the SQUID and the grounding part for feeding a RF signal into the SQUID; an LO signal source and antenna part for applying a flux of an LO signal frequency to the SQUID; and, an IF signal detecting part for detecting an IF(Intermediate Frequency) signal mixed in the SQUID, whereby a flux to voltage conversion characteristics of the SQUID of a superconducting junction is used in modulating the frequency and magnetic flux intensity of the LO signal for generating a dominant LO higher harmonics of very high order and mixing the higher harmonics with a high frequency RF signal in frequency base.
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