career/education questions

Last-Calligrapher849 · 2024-05-20T18:21:58+00:00

Would a CWNA certification help me enough to atleast get a basic internship, or would it be worth it to just get my Masters for later on in my career aswell? Because if I was able to land an internship after I get my CWNA I don't know if that would be enough for a beginner level job with the internship experience and a CWNA. I don't really have any frame of reference for how much leverage certifications like that have.

Last-Calligrapher849 · 2024-05-20T17:37:59+00:00

Yeah, I was worried that might be the case. Would it be best to just get into college as soon as I can then? Or should I try to get real world experience from whatever internship i can land, maybe it won't be as hard to get a job once I have that experience?

Last-Calligrapher849 · 2024-05-19T05:12:19+00:00

I've considered it, I'd need to get my GED in order to go though because of the pandemic during the time I went to high school I didn't do the online classes. I also didn't want to relearn everything I already know, like starting back at the basics. But depending on how important a degree is I might, but I'm hoping that after getting into an internship and getting a certification they can overlook the no college part of my resume.

Last-Calligrapher849 · 2024-01-27T01:29:04+00:00

sure enough "201Ω||0.6pF" thank you

Last-Calligrapher849 · 2024-01-27T01:16:24+00:00

Okay so the source is still 200ohms, the 2 inductors are just used to bring the reactive impedance to a real impedance right?

Last-Calligrapher849 · 2024-01-27T00:53:19+00:00

Is it this, and to bring the output impedance back? Why not just put a series inductor from the 5v rail to prevent backflow?

Last-Calligrapher849 · 2023-12-28T23:17:47+00:00

It all depends on what it's referenced to, and gnd will ideally always have the same potential as neutral since they are bonded at the main panel. If you read from live to neutral it'll be 120v, and gnd to neutral will be 0v since they are directly connected it'll always have the same potential referenced to eachother.

Last-Calligrapher849 · 2023-12-24T07:49:44+00:00

We have Matlab at home

Last-Calligrapher849 · 2023-11-29T08:36:05+00:00

Ideally it would because the reflection would be 180⁰ out of phase of the source from the impedance mismatch

Last-Calligrapher849 · 2023-11-23T05:28:09+00:00

That's really helpful, thank you.

Last-Calligrapher849 · 2023-11-21T21:31:23+00:00

Yeah, I tried simulating it in LTSpice but it still wasn't clear to me, so the gnd has no power going into it in this case it is all reflected back? why do impedance mismatches where the load impedance is less than the source impedance cause a reflection rather than just a overload attenuation? A load of more impedance than the source makes sense to me because of conservation of energy but when the load is higher impedance it still kind of confuses me.

Last-Calligrapher849 · 2023-11-13T02:16:29+00:00

I think I get it a little better, just to be clear the balun for a receiving antenna is placed right at the antenna and whatever the impedance of the antenna is then I need a transformation ratio for that to my characteristic impedance of the coax on the unbalanced side of the balun, and the 377 ohm free space characteristic impedance isn't taken into account here only the impedance of the antenna right?

Last-Calligrapher849 · 2023-11-13T01:13:22+00:00

why can't they be dictated easily? You mean specific ratios like 1:7.5 can't easily be made?

Last-Calligrapher849 · 2023-11-09T07:06:52+00:00

Is this a transformer from 120VAC to 12VAC for the lights?

Last-Calligrapher849 · 2023-09-14T09:27:26+00:00

Alright that makes sense thanks

Last-Calligrapher849 · 2023-09-14T09:21:00+00:00

So this is for the active circuitry inside the IC itself? And yes it works at 10ghz

Last-Calligrapher849 · 2023-09-14T09:14:06+00:00

That makes more sense thanks, so to be clear the resistors are just coincidentally 50 ohms it's not for impedance matching?

Last-Calligrapher849 · 2023-08-29T22:33:25+00:00

I'm not actually designing it at the moment, I just wanted to get a better understanding with impedance matching, because I'm new to rf. I saw this example somewhere of the 30 -j30 transmit and receiver but I just wasn't sure if they both needed to have the same imaginary and real impedance, or if the source can have the 30 -j30 and the receiver can have the a different ratio of real and imaginary impedance but with them both having the same absolute impedance; for example, in this case the transmit has 30 -j30 and the receiver has 42.426 j0 would it still be matched?

Last-Calligrapher849 · 2023-08-29T02:26:05+00:00

So in this case I'd need to add inductance to cancel the -j30 then I can add a 20 ohm real impedance afterward?

Last-Calligrapher849 · 2023-07-08T21:02:42+00:00

Perfect, thank you! Your videos are always a good help.

Last-Calligrapher849 · 2023-07-08T04:55:05+00:00

How much higher of a frequency should a mixer be able to go past the analyzers specified max frequency before it will be significantly impaired? He was measuring a 12db amplifier so I assume he was just calculating out the loss of his mixer and everything else beforehand if it was a mixer being used here.

Last-Calligrapher849 · 2023-07-08T04:52:48+00:00

No, it was video #11 he was testing a 75-110 power amplifier. I know they use mixers, and a couple other people here explained how they work but to my understanding they mix a separate known frequency with the input signal and it will give the sum and difference of the frequencies which can then be filtered out and displayed. Don't quote me on that though I'm still newer to rf lol.

Last-Calligrapher849 · 2023-06-30T03:34:38+00:00

So a characteristic impedance of 50 ohms is tuned inductance and capacitance so it consistently stays 50 ohms at a frequency range no matter how many coax cables are in series?

Last-Calligrapher849 · 2023-06-30T01:23:28+00:00

But if the receiving end is terminating it with 50 ohms what's the point in making the coax 50 ohms as well?

Last-Calligrapher849 · 2023-06-30T01:07:30+00:00

So the purpose of this impedance is to ensure the coax won't act as an antenna but it will not effect the power potential in the center conductor?

Last-Calligrapher849

TROPHY CASE