| 摘要 |
<p>PURPOSE:To measure a pulse compression ratio over a wide band by using a phase detector of an I/Q phase detection type. CONSTITUTION:In order to obtain an output response waveform of a phase detector in any combination of delay time tau and carrier frequency (f), an I/Q phase detector is used as the phase detector to obtain a phase detection output response waveform having phase difference of 90 deg., so that a pulse compression ratio is measured. Since an I/Q phase detector output signal has phase difference of 90 deg., even if a phase detector output becomes zero every frequency that input signal frequency becomes a value proportional to an inverse number of the delay time tau (that is f = N.1/tau where N is an integer), an output response waveform from the other phase detector can be utilized to count the pulse compression ratio.</p> |
