开云体育

I'm not sure the noise floor is greatly affected by shielding; it would be dominated by the noise of the input amplifier (if any - the original NanoVNA just feeds the mixer through a pad, with no gain

That bites microwave designers a lot - you have a gold plating over nickel, which "sticks" a lot better to many things, and doesn't have a diffusion problem like gold or silver directly on aluminum or

If someone has the skills to create a 3D model for the case, printing with both RF-absorbing carbon-fiber-fill FFF filament along with using cavity-style infill seems it might be a nice upgrade on the

That's what I suspected. I'd appreciate a photo or two, but I think I could work it out without them. Jim KC3DPO

(apologies for the previous post; there was some fat-fingering on my part :-) ) I didn't know this, thanks. - Roland 9V1RT

Note that what was discussed in the article was a driven element of an antenna (a microwave horn), not a parasitic (like a parabolic reflector for example). The numbers that you suggest would make for

I endorse N0YWB's recommendation of using self-adhesive copper sheet. On the usual Chinese sales websites one can easily find it, in rolls of various widths, with conductive glue. This copper tape is

I'm not sure I would call $45 for a 12 oz can inexpensive unless all alternatives cost more. The article refers to professional applications which can easily absorb such costs. McDermid Chemical which

Hi Jim, Some metal working is required: I've made a slot in the top to access the controls and it works fine. I'll put up some more pictures if you are interested. Michael (GW7BBY)

It works ok (skin depth isn't much different), but the real issue is that usually, the adhesive is not conductive.? Folks use this to make toroids for Tesla Coils, but in that application, the HV

That's about 0.7 mil thick.? You might be able to find it with conductive adhesive - in which case you don't need to solder.? The 3M stuff is, this doesn't say one way or another, so I'd assume not.

How about aluminum 'duct' tape for shielding? What are the differences compared to copper tape? Mike C.

Here is the one I am using for my H4. https://www.amazon.com/gp/product/B07CG4691Y It has some padding, and pockets for cables, etc. ...Bob / AA2FD

Self-adhesive copper foil may be alternative that offers better shielding. I have used it on many plastic enclosures. I can solder bridge between sheets to cover areas wider than 4 inches.

I like your solution, but how do you access the controls on the Nanovna? It appears they are all inside the case. What is it that I'm missing? Thanks in advance. Jim KC3DPO

Jim, I've used that tin oxide for shielding of a few large products. Visibly it's transparent which was a requirement. But I've found it's only marginally effective, but it's better than nothing. Dave

in practice, touch screens usually have a transparent conductive layer on the top (indium tin oxide is common).? Or the actual LCD display has an ITO top electrode, and the touch screen is resistive

And how are you going to "shield" the touch screen? And those "thin traces" to the SMAs? They are likely printed against a ground plane in the layer beneath the surface layer and likely adjusted in

Here. I look at it this way. 10% in transmission (power) corresponds to a transmitted E field 32% of the incident E field. A surface that reflects 90% of the incident power still allows 30% of the E

I'd call 10dB in power and 20dB in E-field poor shielding and 0.4 dB loss on reflection very good for an antenna. You could take another example, 50%/50%. That's 3 dB each way. We could argue ad