Disclosed is an apparatus and a method for facilitating a first frequency filtering and a second frequency filtering together with non-reciprocal frequency conversion for electromagnetic isolation.

Disclosed is an apparatus and a method for facilitating a first frequency filtering and a second frequency filtering together with non-reciprocal frequency conversion for electromagnetic isolation.

A frequency selector for superconducting parametric amplifiers. According to illustrative embodiments, a frequency selector system for superconducting parametric amplifiers may comprise a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency, a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency, and an inverse diplexer electrically connected to the resonator for separating the signal frequency and the idler frequency. In some embodiments, a frequency selector system for superconducting parametric amplifiers, comprising a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency; a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency; and a multiplexer electrically connected to the resonator for separating the signal frequency and the idler frequency.

A frequency selector for superconducting parametric amplifiers. According to illustrative embodiments, a frequency selector system for superconducting parametric amplifiers may comprise a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency, a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency, and an inverse diplexer electrically connected to the resonator for separating the signal frequency and the idler frequency. In some embodiments, a frequency selector system for superconducting parametric amplifiers, comprising a Josephson traveling wave parametric amplifier (JTWPA) for producing entangled photon pairs at signal frequency and idler frequency; a resonator electrically connected to the JTWPA for tuning the signal frequency and idler frequency to an application frequency; and a multiplexer electrically connected to the resonator for separating the signal frequency and the idler frequency.

A matching technique for receivers with ESA so that the receiver can achieve low noise performance over a broad bandwidth. An electrically small dipole is matched directly to a parametric amplifier, without using any inductors. The parametric amplifier operates in a time-varying fashion, driven by a higher RF frequency pump, and exhibits a high impedance, time-varying capacitive load to the ESA. Therefore, the low frequency voltage output from the ESA is detected at the input of the parametric amplifier, being amplified and upconverted to the proximity of the pump frequency at the output with minimum contamination of noise in this process.

A matching technique for receivers with ESA so that the receiver can achieve low noise performance over a broad bandwidth. An electrically small dipole is matched directly to a parametric amplifier, without using any inductors. The parametric amplifier operates in a time-varying fashion, driven by a higher RF frequency pump, and exhibits a high impedance, time-varying capacitive load to the ESA. Therefore, the low frequency voltage output from the ESA is detected at the input of the parametric amplifier, being amplified and upconverted to the proximity of the pump frequency at the output with minimum contamination of noise in this process.