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  1. hansen64

    simple E/M question

    Thanks logbook for the fast response. Good info. Now I'm confused as to the difference between the B field and the H field. It seems like they are basically the same thing, with a constant mu multiplier being the only difference between the two. I guess I don't see why *both* B and H are...
  2. hansen64

    simple E/M question

    So, I understand that in free space, E fields and B fields appear together, and they scale by a ratio of 377. But I think this is only true for moving E fields or B fields. So, just to clarify, a permanent magnet sitting on a desk has a B field -- correct? But, since it is not moving in...
  3. hansen64

    Scaler Network Analyzer question

    "seeing reflections from at least two mismatches that are positioned at different physical points along the line" Very good, that makes total sense. To extend my understanding of what's going on one step further, why is the VNA able to cal these effects out for a perfect measurement, while...
  4. hansen64

    Scaler Network Analyzer question

    When I look at my plot of VSWR vs Freq, I see a periodic wave type of thing as I look along the freq scale. In other words, the VSWR seems to differ with freq by as much as .8 or so VSWR. I guess this is some phase effect as the electrical length of the cable changes with freq. But I...
  5. hansen64

    VSWR

    ... Say, I posted a similar (but not exactly the same) question here at eng-tips at http://www.eng-tips.com/viewthread.cfm?qid=106749&page=1 if you have a chance to go over there, that would really help out! Thanks in advance.
  6. hansen64

    Scaler Network Analyzer question

    Hi, I am using an Anritsu/Wiltron 54111A with the accessory SWR autotester to test SWR in the AMPS-CELL band, the GPS band and the PCS band. This is a production test arrangement, and I want to test an antenna that I know is of about VSWR = 1.6 or so. The problem is the antenna is at the end...

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