I am sure you are right Derek, but it seems nowadays that one amp covers the entire 80 - 1000 MHz range, so you go with about 100 - 150 Watts.
---------- >From: Derek Walton <[email protected]> >To: Ken Javor <[email protected]> >Cc: [email protected], [email protected] >Subject: Re: Power Amps for Immunity Testing >Date: Sat, Nov 20, 1999, 12:30 PM > > Ken, > > I get away with 50 to 75 watts from about 150 MHz to 1 GHz: using amplifier > research > Amps and the EMCO 3142 antenna. To get the extra field reliably below this takes > about 200 watts. OR, if the sample is small enough, I make up as strip > line, and 100 > watts is more than enough down to really low... > > As for rental, there are several companies on the west coast that rent just about > anything: but mention EMC testing and the cost will double;-) > > Derek Walton > Owner > L. F. Research EMC Design and Test Facility > 12790 Route 76, > Poplar Grove, > IL 61065. > www.lfresearch.com > > > Ken Javor wrote: > >> You will need 100 Watts or more below 1 GHz. Usual purveyors are IFI and >> Amplifier Research, but I don't know where to rent them. Above 1 GHz it >> gets more complicated. If you must maintain the 1.5 m square quiet zone of >> iec 1000-4-3, you will continue to need 100 W amplifiers and it will get >> quite expensive, since these amps or only good for octave or double octave >> bands. If you get some relief, to where your quiet zone radius is related >> to the wavelength, then power source requirements drop with increasing >> frequency and eventually you can run from a signal generator output. There >> is a company which services the old Hughes TWTAs (no longer manufactured) >> from which you may be able to rent. If no one else comes up with useful >> sources, I will try to find out who they are. BTW, TWTA = traveling wave >> tube amplifier. This technology is fairly common above 1 GHz, although >> solid state devices are slowly catching up. >> >> ---------- >> >From: [email protected] >> >To: [email protected] >> >Subject: Power Amps for Immunity Testing >> >Date: Fri, Nov 19, 1999, 8:59 AM >> > >> >> > >> > >> > >> > List-friends, >> > >> > I am trying to perform some in-house immunity troubleshooting, and I want to >> > generate 10V/m fields up to several GHz. What power amps would you recommend, >> > and does anyone know of a good source to rent them? >> > >> > Dana J. Bergey >> > W. L. Gore & Associates, Inc. >> > [email protected] >> > >> > >> > >> > --------- >> > This message is coming from the emc-pstc discussion list. >> > To cancel your subscription, send mail to [email protected] >> > with the single line: "unsubscribe emc-pstc" (without the >> > quotes). For help, send mail to [email protected], >> > [email protected], [email protected], or >> > [email protected] (the list administrators). >> > >> > >> >> --------- >> This message is coming from the emc-pstc discussion list. >> To cancel your subscription, send mail to [email protected] >> with the single line: "unsubscribe emc-pstc" (without the >> quotes). For help, send mail to [email protected], >> [email protected], [email protected], or >> [email protected] (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
