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Thanks. I've used the harwin shield clips before, along with a folded copper box. Was looking into alternatives, otherwise that's what I'll do again as it worked, despite taking some time.
Hello,
Not strictly RF/microwave, as it's more EMC, but this is obviously something important in RF/microwave so hopefully someone here will know the answer.
I am looking for a simple way to construct PCB shielding cans. I need the cans to be quite large and tall, and I would rather not cut...
I have a small, cheap (bought from ebay) 2.4GHz video transmitter which I am using with a small CCTV camera to transmit back footage from a quadrocopter. The reception isn't fantastic, it only cost about £5 so it's not a huge issue, but before I buy something else I may as well see what can be...
biff44 and kaggie, thank you for your help here. I had forgotten about the PIN diode handbook, although in the past I have used it mainly for the MRI chapter...
Taking into consideration all that has been said here I have redesigned the gate. Given that when I don't want to transmit the...
biff44 - thanks for your help with this.
So it looks like it's best if I go back to the design I used with the 1W gates (which similar to how you described), but with a larger power supply (+-50V) so the diodes don't accidentally turn on when reverse biased.
Thanks for your comments bif44
In my analysis I have used parasitic values for my capacitors given on by the ATC100B datasheets (equivalent capacitors to what I am using), I have measured the SRF of my inductors and found them to be all above 500MHz. My chokes have a SRF of about 220MHz...
It's not just a DC blocking cap, it also series resonates out the reactance of L1. Theoretically, the combined reactance of L1 and C4 at 123.259MHz should be zero (and in simulation with ideal components it is), of course due to parasitics it doesn't quite get there. The problem I am having is...
The 50R after the chokes is to provide current regulation to bias the diodes at 100mA. The other 50R is a load for in black mode.
Pin diodes are from Passive Plus, Inc. - Passive Plus Inc., a manufacturer of HI-Q Capacitors and other RF/Microwave and MRI components.. Probably not ideal but I...
the schematic thumbnail appears to be broken, but click on the dark space.abed out will show a full size image.
I don't follow what you mean by control. I'm not trying to build a new rfpa, I already have an extremely linear one specifically designed for nmr/mri, the only issue is noise. The...
Hi,
I am currently building a high power (ideally 100W+ CW) noise blanking gate for the output of an AMT M3205A power amplifier for use in MRI. Basically, even with the blanking circuitry switched in (for all stages in the amplifier) there is a significant amount of noise being emitted from...
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