AMY@Lecce: statusAuger Lecce Meeting, 24-03-2011

Power Detector(ZX47-60-S+) Time response Signal Pulse Width from 10 nsec to 200 nsec 2 different frequencies (1.7 GHz and 2.6 GHz) INPUT SignalOUTPUT Signal ( PeakToPeak measure) The power detector seems fully efficient only for signals having a pulse > 100 nsecA similar temporal behaviour on rise/fall. Rise Time > then specifications AMY- Time Response of Power Detector (a reminder from last meeting)

AMY- Power Detector Time response- before and after ModificationsPD modifiedThe AD8318, as used in (ZX47-60-S+) has an external capacitor connected to CLPF (loop filter capacitor) to provide additional filtering for VOUT. However, using the CLPF capacitor slows the response time. For applications requiring maximum RF burst detection capability, the CLPF pin should be left unconnected.

Power Detector(ZX47-60-S+) Time responseDT

AMY- Power Detector Linearity Before and after Mods.PD modifiedPower Detector(ZX47-60-S+) Linearity

Power Detector(ZX47-60-S+)AMY- Power Detector Linearity Before and after Mods.

Power Detector(ZX47-60-S+)

AMY- Power Detector Linearity of Time Response

Power Detector(ZX47-60-S+)There is a 10 internal resistor in series with the output driver. Because of this resistor, it is necessary to add an external 40 back-terminating resistor in series with the output when driving a 50 load. Place the back-terminating resistor close to the VOUT pin. The AD8318 has the drive capability to drive a 50 load at the end ofa coaxial cable or transmission line when back terminatedREADY TO TEST! AMY- Power Detector (ZX47-60-S+) a bit more mods to do

AMY-Characterization of PD(ZX47-60-S+) Fall TimeQuite stable answer from the3 power detectors

AMY-Characterization of PD(ZX47-60-S+) Time ResponseQuite stable answer from the3 power detectors

AMY-Characterization of PD(ZX47-60-S+) Linearity Quite stable answer from the3 power detectors

AMY-Characterization of PD(ZX47-60-S+) Linearity Quite stable answer from the3 power detectors

Power Detectors. 2 more from AD with home made board (not working).. Pietro brain storming Time response Investigating the 3 Power Detectors PD(ZX47-60-S+) now in the lab, mods in the board for the time response investigation ! OnGoingFADC-> ordered ! More LNBF on different bands (C, Ku).Conclusion and outlookTO DO A bit more to do: for time time response investigation- Switch on the LNBFAntenna for S Band (to be finalized)Linearity of PowerDetector (more to do?)Power Supply (for the AMY test Beam)

Personal Comment We are dealing with Power Detector quite smoothly now . It is hard to believe we can reach few nsec time response, but it is also hard to believe that we can reach an high gain without them -60 dBm is 0.225 mVMore work to be done on feeds and antennas.