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Questions tagged [shield]

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1
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2answers
38 views

How I can simply measure interwinding capacitance in a transformer with electrostatic shield

I want to measure which is the effect of the connection of the electrostatic shield (between primary and secondary) to ground (or to neutral) in reducing the interwinding capacitance in my transformer....
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0answers
25 views

Wire shield when using connector for strain gauge sensor

I have made strain gauge sensor with 1 strain gauge. Thet gauge is in "bottom" part of Wheatstone brigde (one strain gauge terminal is signal, second is connected to ground). I'm using Sommer CICADA ...
4
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2answers
76 views

Why is shielding effectiveness different for various hole geometries?

I have run into the equation below in various literature/app notes. (example). I have never seen the derivation for such an equation and don't understand why round apertures are more effective at ...
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0answers
113 views

Connecting the Chassis Ground and Signal Ground in my PCB

I have been reading alot of questions on this site to clear my understanding on Chassis, Signal Ground, ...
3
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1answer
193 views

Shield in Inner Copper Layer

I have been designing second version of 4 Layer PCB. The PCB has connectors all over the PCB. In the first version, I had Copper Pour (I call it ...
1
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1answer
64 views

Lightning protection for Antenna Connector

I want to add lightning and ESD protection for the antenna used with my PCB (Wireless Gateway). The antennas that will be used with my PCB are Pole Mount Antenna. There are three different types of ...
1
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1answer
60 views

Double Shielding — Insulator between shields?

To minimize RFI and provide maximum shielding on an enclosure, a double shield will be used. I need 120dB of isolation over a certain range of frequencies and will be testing using a reverberation ...
1
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3answers
257 views

RS485: Where to connect the cable shield in a battery-powered system?

I have implemented a Modbus with the RS-485 bus. The length of the bus is about 80 meters and I have connected the master and 10 slaves. The system is battery-powered and will be outdoor. My question ...
1
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2answers
343 views

Altium Designer - Shielding footprint “component clearance” violation

I'm trying to make a footprint for an RF shield. I made a footprint just putting few pads in square shape but the problem is that the Altium report me a "component clearance" violation. How can I ...