Electromagnetics is fun! So far, I have two courses online -- ECE 3300 Introduction to Electromagnetics and ECE 6340 -- Numerical EM. For more information on these courses (like the course notes, better photos of the webcam lectures, etc.) go to www.ece.utah.edu/~cfurse and click on courses.
Learn about reference planes and your connectors. The Open, or other standard, presents a set of conditions that are well documented and also fed into your VNA (or built in). This allows the analyzer to establish near ideal conditions at the reference plane ... for THAT connector type. All that comes before it, port, test cable, are removed mathematically.
Cool, I ride Icelandic saddles on my Icelandic horses, which are amazingly comfortable. Been packing all kinds of stock and saddles for 19 years now and never seen anyone put a load that far back on a horse. Does it have any historical precedent? Have you ever run this rig at a canter or a trot? I'm all for keeping weight off the kidneys-people pack way too much in saddle bags. I think large pommel bags would be a better choice for the heavier items. Really neat system you have developed. Ever had the velcro ice / clog up? This should help some equestrian types get out further in the back country. Equestrians are my favorite clients up here in AK. Why people want to ride western when they arent working cows is a mystery to me.
Hello, I would invite to ask Keysight Solution engineer to provide an education update how to use the VNA. You have added a channel, instead of a trace. A channel is a new measurement configuration and have its own calibration set. You could have done correctly your experiment if you would have use {cal}{cal other} and select “Cal All”. Then both channel would have been calibrated and you would not have seen the S22 Problem. For single channel calibration, better to use smartCal and not basic cal.
And also teach your students not to spin RF connectors, especially in cal kits. This means sometimes holding a stubby little end so the center pin does not turn as you tighten the barrel.
Oh my goodness! Not enough Coulombs! At 3:00, the integration (in time) should be integrated with time in SECONDS, not HOURS! So, integrate from 0 to 3600 seconds (= 1 hour), and you'll get (20)(3600) Coulombs!
Sorry to say, but you seem to not having understood the very basics of a calibration kit. You can't just take any open/short/load and expect proper results.
Technically you are correct, you should not reuse the standard you have use, because the VNA has computed the error for this particular standard. Better to use another one. But if you don’t have other the you have to know that usually the standard has a delay where the open or short take place. So when you reconnect them you will see the effect of this delay on the smith chart.
Calibration with 'ideal' loads is definitely possible, albeit at the right frequency band where the electrical length of the load/connector is sufficiently small ( typically HF, VHF and lower UHF).
You seem to have, at around 1:42, that V_0 = 0 if V_p = V_n, and that V_0 = Vcc if V_p = V_n. Not sure what you meant, but this is ambiguous as V_0 equals both 0 and Vcc if V_p = V_n.
Would you be able to tell me if a Gary-Hoverman antenna used for TV could be made to have more gain with some changes to the design itself ??? Thanks and nice video too.
I don't think so, because those types of filters only work if the wavelength (lamda) of the signals approach the dimensions of the elements/conductors ( for example lambda/4 stubs etc.) A 20kHz signal would have a wavelength of c/f = 15 kilometers ! (in vacuum). On a conductor the wavelength is a bit different, but still way too big to realize such a Microstrip filter for audio, unless you're willing to build such a big PCB... ;)
For audio, just use op. amp. with capacitors and resistors like everyone is doing. It is even smaller than 50GHz microstrip filter. Google for Sallen-Key filters
@@davidbrooks8621 the problem with capacitors in audio filters is the introduction of signal phase shifting, delay, and distortion at the filter cut off point.
@@chasepe5762 Every analog filter design with capacitors or inductors has the problem you mentioned. Use it first with wider bandwidth and then use a DSP and symmetric FIR filter and the job is done. Any way all the stuff with microstrips is for microwave frequency and not audio freq.
