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We have demonstrated that a superconductor-insulator-superconductor (SIS) mixer pumped by a photonic local oscillator (LO) covers the whole frequency range of 0.2-0.5 THz. In the bandwidth of 74 % of the center frequency, this single-band receiver exhibits the noise temperature of TRXles20hf/kB, where h is Planckpsilas constant, f the frequency, and kB Boltzmann constant. Resultant TRX is almost equal...
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