![]() ![]() ![]() Therefore when sending a purchase order for two-port SAW resonators, please indicate the phase shift value (180° or 0°)at a nominal frequency. The phase conditions of a two-port resonator for oscillation vary with the oscillation circuits used. In particular, such a two-port resonator demonstrates its real value in high frequency circuit use. Thus, a two-port resonator is often used as well as a one-port resonator. ![]() Since a two-port resonator is a low-insertion loss band pass filter with a very narrow bandwidth, it can readily be used to form an oscillation circuit by building a feedback loop with a single stage amplifier. A two-port resonator (Fig.3) has a pair of IDTs flanked by a pair of reflectors, resulting in a similar high-Q resonance to a one-port resonator. ![]()
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