Magnetic-free traveling-wave nonreciprocal superconducting microwave components

• URL: http://arxiv.org/abs/2106.02928v1
• Date: Sat, 5 Jun 2021 16:15:38 GMT
• Title: Magnetic-free traveling-wave nonreciprocal superconducting microwave components
• Authors: Dengke Zhang and Jaw-Shen Tsai
• Abstract summary: We propose a design to realize integrated broadband nonreciprocal microwave isolators and circulators using superconducting circuit elements without any magnetic materials. The bandwidth of 580 MHz can be realized over a nonreciprocal isolation of 20 dB in reflections.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a design to realize integrated broadband nonreciprocal microwave isolators and circulators using superconducting circuit elements without any magnetic materials. To obtain a broadband response, we develop a waveguide-based design by temporal modulations. The corresponding compact traveling-wave structure is implemented with integrated superconducting composite right-/left-handed transmission lines. The calculations show that the bandwidth of 580 MHz can be realized over a nonreciprocal isolation of 20 dB in reflections. Such on-chip isolators and circulators are useful for cryogenic integrated microwave connections and measurements, such as protecting qubits from the amplified reflected signal in multiplexed readout.

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