Fig. 3
From: Synchronized conductivity modulation to realize broadband lossless magnetic-free non-reciprocity
Infinite-bandwidth gyrator based on a balanced pair of delay lines with switches. a Schematic and operation diagram of the balanced infinite-bandwidth gyrator, consisting of a pair of transmission lines of characteristic impedance Z 0 (which is the same as the port impedance) and delay T s/4, sandwiched between ideal switch quads clocked at ω s with 50% duty cycle. A pair in the switch quads connects the balanced inputs and outputs to the transmission lines directly in one half cycle, and the crisscrossed pair performs a polarity inversion in the other half cycle. The switch quads on either side operate with quarter-period delay between them. This structure provides a non-reciprocal phase shift of π with zero insertion loss and perfect input/output matching (i.e., ideal gyrator operation) over all frequencies. b Scattering parameters for the case of f s = 8.33 GHz
