Making Accurate Radar Pulse Power Measurements
應用說明
Pulse power was traditionally determined by measuring the average power of the pulse and then dividing the measurement result by the pulse duty cycle value to obtain the pulse power reading, as shown: Pp = Pavg/Duty cycle
The drawbacks to this measurement method are that the measurement result is a mathematical representation of the pulse power rather than an actual measurement and it assumes constant peak power. The pulse power averages out any aberrations in the pulse, such as overshoot or ringing. For this reason it is called pulse power and not peak power or peak pulse power as is done in many radar references.
In order to ensure accurate pulse power readings, the input signal must be a repetitive rectangular pulse of constant, known duty cycle (see Figure 1). This application note demonstrates the capability of the Keysight Technologies, Inc. power meters and power sensors to measure radar pulse power signal using a duty cycle methodology and an internal/external triggering time-gated methodology.