A non-reciprocal quantum device that comprises a first terminal and a second terminal, a transmission structure connected between the first and second terminals and configured to transmit microscopic particles in at least a partially phase-coherent manner from the first terminal to the second terminal and possibly from the second terminal to the first terminal, wherein a time-reversal symmetry of the transmission of the particles is broken with respect to at least a portion of the transmission structure; wherein the time-reversal symmetry is broken in such a way that the transmission structure comprises a higher transmission probability for particles moving in a first direction from the first terminal to the second terminal than in a second direction from the second terminal to the first terminal.

A non-reciprocal quantum device that comprises a first terminal and a second terminal, a transmission structure connected between the first and second terminals and configured to transmit microscopic particles in at least a partially phase-coherent manner from the first terminal to the second terminal and possibly from the second terminal to the first terminal, wherein a time-reversal symmetry of the transmission of the particles is broken with respect to at least a portion of the transmission structure; wherein the time-reversal symmetry is broken in such a way that the transmission structure comprises a higher transmission probability for particles moving in a first direction from the first terminal to the second terminal than in a second direction from the second terminal to the first terminal.

RF co-designed bandpass filters/isolators (BPFIs) are based on series-cascaded non-reciprocal resonant stages, microwave resonators and multi-resonant cells. The non-reciprocal stages are shaped by an in-parallel cascaded transistor-based path and a transmission line (TL) that result in a zero-phase resonance in the forward direction and high isolation in the reversed one. This includes coupling routing diagrams (CRDs) of BPFs that result in low- and high-order transfer functions with and without transmission zeros in their forward direction and high levels of isolation in the reverse one. BPFIs provide alternative-type of filtering responses (e.g., flat-passband, quasi-elliptic) with and without gain in the forward direction and high levels of isolation in the reversed one. BPFIs include five planar microstrip/lumped element (LE) prototypes using hybrid combinations of non-reciprocal resonant stages, microwave resonators and multi-resonant cells.

Disclosed herein is a non-reciprocal circuit element that includes a dielectric substrate having a through hole, a magnetic rotator accommodated in the through hole, and a permanent magnet that applies a magnetic field to the magnetic rotator. The magnetic rotator is supported by the dielectric substrate without contacting an inner wall of the through hole.

Disclosed herein is a non-reciprocal circuit element that includes a dielectric substrate having a through hole, a magnetic rotator accommodated in the through hole, and a permanent magnet that applies a magnetic field to the magnetic rotator. The magnetic rotator is supported by the dielectric substrate without contacting an inner wall of the through hole.

Disclosed herein is a non-reciprocal circuit element that includes a magnetic rotator, a permanent magnet for applying a magnetic field to the magnetic rotator, a lower yoke, and an upper yoke fixed to the lower yoke and housing therein the magnetic rotator and the permanent magnet. The upper yoke includes a top plate part that covers the magnetic rotator and the permanent magnet from an upper side, and first and second side plate parts that face each other and cover the magnetic rotator and the permanent magnet from a side. The first and second side plate parts have first and second plate spring parts that sandwich the permanent magnet and bias it.

Disclosed herein is a non-reciprocal circuit element that includes a magnetic rotator, a permanent magnet for applying a magnetic field to the magnetic rotator, a lower yoke, and an upper yoke fixed to the lower yoke and housing therein the magnetic rotator and the permanent magnet. The upper yoke includes a top plate part that covers the magnetic rotator and the permanent magnet from an upper side, and first and second side plate parts that face each other and cover the magnetic rotator and the permanent magnet from a side. The first and second side plate parts have first and second plate spring parts that sandwich the permanent magnet and bias it.

Disclosed herein is a non-reciprocal circuit element that includes a substrate having lower and upper surfaces, a magnetic metal layer provided on the lower surface of the substrate, a magnetic rotator provided on the upper surface of the substrate, and a permanent magnet for applying a magnetic field to the magnetic rotator. The magnetic metal layer includes a lower yoke provided at a position overlapping the magnetic rotator in a plan view and a plurality of terminal electrodes connected to the magnetic rotator.

Disclosed herein is a non-reciprocal circuit element that includes a substrate having lower and upper surfaces, a magnetic metal layer provided on the lower surface of the substrate, a magnetic rotator provided on the upper surface of the substrate, and a permanent magnet for applying a magnetic field to the magnetic rotator. The magnetic metal layer includes a lower yoke provided at a position overlapping the magnetic rotator in a plan view and a plurality of terminal electrodes connected to the magnetic rotator.

RF co-designed bandpass filters/isolators (BPFIs) are based on series-cascaded non-reciprocal resonant stages, microwave resonators and multi-resonant cells. The non-reciprocal stages are shaped by an in-parallel cascaded transistor-based path and a transmission line (TL) that result in a zero-phase resonance in the forward direction and high isolation in the reversed one. This includes coupling routing diagrams (CRDs) of BPFs that result in low- and high-order transfer functions with and without transmission zeros in their forward direction and high levels of isolation in the reverse one. BPFIs provide alternative-type of filtering responses (e.g., flat-passband, quasi-elliptic) with and without gain in the forward direction and high levels of isolation in the reversed one. BPFIs include five planar microstrip/lumped element (LE) prototypes using hybrid combinations of non-reciprocal resonant stages, microwave resonators and multi-resonant cells.