Systematic design of microwave parametric amplifiers, frequency converters, and circulators

Impedance-matching and filter synthesis techniques from microwave engineering can be harnessed to systematically design Josephson parametric amplifiers and non-reciprocal devices. We will show that parametric couplings function analogously to immittance inverters in microwave circuits, and then apply filter synthesis techniques to the design of wideband Josephson parametric amplifiers, frequency converters, and circulators. We will present data from degenerate parametric amplifiers having engineered Chebyshev gain profile with over 400 MHz bandwidth and 20 dB gain, and show preliminary results from frequency converting devices.