Recent developments in two-port YIG delay lines

A new type of two-port YIG delay line has been designed and realized which makes use of the YIG acoustic birefringence in order to obtain the smallest level of losses for the transmitted signal through the YIG bar. A minimum value of 26 dB was measured at 2.5 GHz for a 3.5-µs delay and a 3-dB bandwidth of 160 MHz.