We theoretically investigate a high-efficiency and broadband microwave storage and retrieval scheme employing a superconducting artificial chiral molecule embedded in a one-dimensional transmission line. By optimizing the parametric coupling, the chiral $\mathrm{\Lambda }$-type molecule enables near 100% storage efficiency and fidelity across a bandwidth of 100 MHz. Our results provide a feasible pathway toward implementing microwave quantum memories compatible with broadband quantum networks.

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• Electromagnetically induced transparency
• Quantum circuits
• Quantum information with solid state qubits
• Quantum memories
• Quantum optics with artificial atoms
• Superconducting quantum optics
• Superconducting qubits