A non-magnetic gyrator utilizing switched delay lines

A nonreciprocal phase shifter (gyrator) is designed to operate at 24.83 MHz using two transmission lines and two single-pole, double-throw (SPDT) switches switched at 24.83 MHz, 90° out of phase. In one direction, the signal passes as if the gyrator were a normal transmission line. In the other, the signal is trapped in the transmission line such that it sees a line effectively three times as long. This design can be easily scaled to higher frequencies with the use of subnanosecond switches in an integrated circuit.

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