  We demonstrate a Josephson parametric amplifier design with a band-pass
impedance matching network based on a third-order Chebyshev prototype. We
measured eight amplifiers operating at 4.6 GHz that exhibit gains of 20 dB with
less than 1 dB gain ripple and up to 500 MHz bandwidth. The amplifiers further
achieve high output saturation powers around -73 dBm based on the use of
rf-SQUID arrays as their nonlinear element. We characterize the system readout
efficiency and its signal-to-noise ratio near saturation using a Sycamore
processor, finding the data consistent with near quantum limited noise
performance of the amplifiers. In addition, we measure the amplifiers'
intermodulation distortion in two-tone experiments as a function of input power
and inter-tone detuning, and observe excess distortion at small detuning with a
pronounced dip as a function of signal power, which we interpret in terms of
power-dependent dielectric losses.
