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Thanks for the reply. I understand this but the footprint is covered by some tape rather than being below the impedance controlled trace. I attach a more detailed view of the final board for clarity. My concern is the mismatch the copper piece will have rather than having a 50 ohm trace at lower...
Good day fellas,
I designed the following board which includes a bias tee, gain amp, and an attenuator which I am still working on since it requires me to program the main IC on an external board to control it via I2C. In the meantime, I would like to make it work and test on it. What I came up...
Tony,
I didn't have a 4 port directional coupler, but I tried the setup with the 3 port coupler I have in the pictures and it worked! To think that I was just beating my head against the desk trying to think of how many more components I would need to replicate the S-parameter test fixture but...
Here is a rough block diagram of what the setup looks now. To me, it seems like RF out should be combined with R while B is coupled to their sum. Still, the VNA can't seem to operate near one with the test fixture.
Looking at the manual of option 011, they show a lot of testing procedures...
Clearing my ignorance some more, I found that the bottom block that I am missing is a solid-sate switch referenced as 85046A/B. Also, this VNA would be option 011, which still doesn't answer my question as to how I can use the ports since the manual shows the usage of the VNA with the test...
Hello guys,
We have an HP/Agilent 8753D, with what I am assuming is incomplete options and fixtures, that I want to use for 2-port testing of equipment as well as S-parameter characterization. So far, I've been able to test 2-port systems to a certain degree (to which I don't know if it's right...
I was able to find why the power consumption was so high. Apparently, the cables I ordered to test this design out where not the same as the ones in the lab nor the devices we use to test, so I was inputting 5V into a data line with polarity protection. This caused the 5V regulator to act...
Hey guys!
So I was finally able to do some testing, I ordered some cheap boards and got my hands to work. I found a couple issues to which I scrapped through datasheets to figure them out but can't seem to pinpoint the issue.
A little background: I wanted to use P2 (bottom connector) to power...
Thanks again for the help.
My idea was to use two bias tee: One for the amp, another one for a remote piece of equipment on the input (left side). I have seen some chokes like the one above, but using different inductors so I wanted to make sure that everything, hopefully, goes as planned if I...
Thanks for the heads up! This is my first time doing a design this way since I learned to do it in microstrip for higher frequencies and in more than ideal cases so it's basically brand new to me.
Right now is looking something like this, I have been doing tons of research and ordered some...
Hello all,
I am fairly new into RF applications but I got some of the basic theory down. I have my first task for my company: Design a bias t with a bandwidth of 100MHz to 1GHz or higher (I was thinking 4GHz so I can use it for other testing purposes) with as low as an insertion loss as...
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