Figure 5
Determined propagating wave character in the superposition of two counter-propagating SAWs from opposing IDTs. The first IDT is kept at a fixed nominal power of −27 dBm, while the power at the second IDT is varied. Black and red squares (dots) give the propagating wave content determined from FFT maps of the amplitude and phase of recorded detuning `movies' as explained in the text. The blue line is a one-parameter fit to the data, revealing the difference between the points of nominal and real power balance. |