Bai: Are you sure that SA + waveguide coupler is a cheaper solution for your return loss measurement ? For a wide band of microwave frequency, you may need a lot of different waveguide couplers, which may cost thousand bucks themselves.
Another problem is accuracy. It's not easy to calibrate your setup to make sure that what you measured is return loss from your EUT rather than something else such as mismatch at the connection between your waveguide and SA. Just my 2 cents. Regards Qu Pingyu > -----Original Message----- > From: Leslie Bai [SMTP:leslie_...@yahoo.com] > Sent: Friday, 13 August 1999 1:15 > To: 'emc-p...@majordomo.ieee.org' > Subject: Horn antennas, pre-amplifier, and return loss measurement > > > Hi, Folks, > > Is there anyone can direct me to some sources > of horn antennas & preamplifiers. > > What I need are sets of horn antenna for spurious > emissions testing to meet FCC Part 101. > > 1 to 18GHz, > 18 to 26.5GHz, 26.5 to 40GHz, or 18 to 40GHz instead, > 40 to 60GHz, 50 to 75GHz, or 40 to 75GHz instead, > 75 to 110GHz, 110 to 170GHz, or 75 to 170GHz instead. > > Due to the significant space loss over 110GHz, I guess > I also need a set of preamplifier from 110 to 170GHz. > > I am also studying on return loss measurement > methodologies to meet ETSI requirement for > radios RF port. Since NAMAS calibration of > network analyzer may cost thousands bucks, > I am wondering if I could achieve a good result > (in terms of accuracy and uncertainty) using > spectrum analyser and waveguide coupler. > If anyone by any chance has an ready error model > of the test setup using spectrum analyzer and > waveguide coupler, I appreciate you could share > with me to short my research path. > > Thanks in advance. > > Leslie Bai > Senior Compliance Engineer > Compliance Quality Manager > Digital Microwave Corporation > 170 Rose Orchard Way > San Jose, CA 95134 > Tel: (408)-944-1754 > > _________________________________________________________ > Do You Yahoo!? > Get your free @yahoo.com address at http://mail.yahoo.com > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
