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I am coming from this world, yes indeed;) actually, I am coming from: "as good as conceivable". That is "all frequencies at 0 S11". But I learned from others and from my simulations that this is unrealistic.
I want to have a real-world antenna (actually, a phased array of 4 elements) for...
> If they touch the side wall that would be perfect.
I double checked (see pics below), and it indeed might be a mistake: me mounting the metal brackets _not_ in the right 180° orientation .. there is a very small gap .. I need to check whether I am able to screw the brackets turned around ...
Thank you so much for your feedback and thoughts!
rgd PCB: yeah, I am "medium-happy". this is my very first PCB, and for 1 iteration, I guess I should be "happy".
basically, the only problem I encountered is wrt to the material: I mean, the mouse bites are good and do work, but I didn't know...
Hi all,
as a RF newbie, I've been making some progress starting from EM modeling, having first PCBs designed and manufactured, but I am now stuck just before "closing the loop" with real-world measurements using LibreVNA =(
any help or hints would be greatly appreciated!
Cheers,
/Tobias...
thank you both a lot for your comments!
funny enough, after spending last night learning and skimming distributors and through tons of datasheets, I basically arrived at almost the same chip as @KlausST suggested, just a variant, as I need 3 PLLs in the clock synthesizer:
Texas Instruments...
Hi all,
I am designing a clock tree / distribution network for my device, which has various clocking needs, and requires a stable, phase synchronous clock tree throughout the whole system for the following frequencies:
* 30.72 MHz
* 25.0 MHz
* 24.0 MHz
For that, I've designed the clock tree...
I found out the reason!
I'll dump it here maybe it's of use for others, and then will close this issue for now as "resolved" - thank you all for your kind help and tips!! Blocker removed.
So the reason was pretty much unexpected - for me;)
Early on I was recommended to design the LPDA for 50...
Thank you so much for pointing me to Marki! I never heard of before, but it looks great and I've added the company to my docs / pot. parts suppliers.
also sorry for not making power requirements explicit from the beginning:
* the absolute minimum RF transmit power I need is _500mW ERP for each...
Can I use a 1:1 LTCC Balun of _any configuration_ to match a balanced 50 ohm dipole to an unbalanced 50 ohm line?
After searching parts, I now realize that there are at least a couple of different configurations, eg
I might understand stuff wrongly, or incompletely, I'm really a RF newbie (I have a ton know-how/experience in all kinds of software tech).
_Connecting_ a coax to a dipole is of course possible, but
- it will use the coax cable to transport a balanced signal (for which it is not designed)
- it...
This sounds great!!
If I can avoid digging into yet another area new to me (transmission line balun), that would be highly welcome!
I've searched Mouser, and it appears only 2 part might fit:
1. Mini-Circuits NCS1.5-232+
- 400 MHz to 2.3 GHz
-1:1.5 Ratio
-RF Power 2W
2. Mini-Circuits...
thank you very much! this is obviously crucial.
it sounded too good with the "just a bunch of SMDs" approach. I thought I could avoid going yet another round on a road completely new for me (this transmission line transformer thing .. I have never done RF before;)
oh well. I'll figure it out;)
Hi all,
I'm new here, also a RF newbie, and this is my first post, so pls bare with me;)
I'm looking for help with 2 specific questions rgd a Printed LPDA I am designing using openEMS.
The PLPDA goals are:
* 400 MHz - 2.8 GHz
* -10 to -20 dB S11 over the whole range
* 50 Ohm unbalanced...
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