Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hi Big Boss! Thanks for pitching in as always :)
It's powered by a drone battery. I've used quite a few DC coupling capacitors before feeding it to the circuitry. I've also used a ferrite bead prior to that. The drone battery is then down regulated using switch mode power supplies. to power the...
Hi Barry,
Sorry :). I'm using LiPo drone batteries and have used ferrites to reduce the potential noise from the battery. It's basically an antenna transmitting at 5Ghz and another antenna 30cm away receiving the reflected signal.
The received signal is mixed using an IQ mixer and I've got...
Hello awesome EDABOARD community!
I've got a DIY CW IQ Radar and the output is "contaminated" with an unknown 50Hz noise that keeps causing harmonics in the result and degrade the result signal.
I'm attempting to measure micro targets, but this 50Hz noise drowns my signals :(
I'm attempting...
Hi Volker :)
Hope you're doing well!
Just wanted to ask you if the cutout in the 2nd ground layer was applied to both SMA pads? Or was it only the first pad ? (even though you mentioned the input section:D )
As for the Gerber file simulation, would CST also be able to get the job done. That's...
You Sir are amazing!!
25 years, wow. Beats everyone I know in this profession :)
I really appreciate your help. I can't believe how far you've taken this from the original attempt.
I'll attempt these changes in a newer model and assemble it!
Thanks a million @volker@muehlhaus
Volker that's amazing work! thank you so much. I'll actually learn how to use that EM solver of yours :)! Looks really professional! Where is the poor matching? and is it something I can resolve in future models Volker ?
I can't think of an additional issue... Could it perhaps be the SMA and...
Volker that would be great! Maybe even tell me what tools you use to do it, so I can adopt your method in the future.
I'm trying to get better at RF design. It's just really hard to find the help needed. I appreciate your efforts :)
I have uploaded the Gerber file
Thanks Volker!
Hi BigBoss
Thank you for taking the time to share your knowledge with me. I'm in the process of learning and I can see I still have a long way to go.
I'll keep this in mind. It's just been a painful experience because I have been trying to replicate analog devices RF amplifiers for so long and...
Hi Volker,
Thanks for that. Really impressed with what you did there.
I thought the PCB top layer ground with a via (or two) would be sufficient. You can see the vias in the below figure (forgot to color those for the amplifiers pad). There's not many of them, but they do connect the ground...
Hi FvM,
Thanks for taking time to look at this. You guys are great!
I literally have no one to ask in our institution 😞
I did have ground the exposed pad to the ground plane :). I guess I went easy on the via fences as you mentioned.
The PCB material used is FR4, and I dont have the current...
Hi Volker
Thank you for having a look :)
I agree the vias might have been on the lower end.. but do you think that will reduce its gain to 1dB gain (while it has a gain of 15dB)
The 4 layers are
Layer 1: RF surrounded by Ground
Layer 2: Ground
Layer 3: Power
layer 4: Ground
This is a...
Hi everyone :)
I've recently started with RF design. So I tried to amplify a 12dbm output power.
I replicated the HMC407MS8G Evaluation board (https://www.analog.com/media/en/technical-documentation/data-sheets/hmc407.pdf) on a 4 layer PCB
The PCBs were made in JLC PCB using the following...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
