Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [faraday-cage]

Use this tag when the topic is related to shielding of sensitive electronic circuits where outside influences (whether electric or magnetic) may influence how they operate so must be eliminated.

Use this tag when the topic is related to shielding of sensitive electronic circuits where outside influences (whether electric or magnetic) may influence how they operate so must be eliminated.

An example discussion may include the degree of covering required to achieve isolation of the circuit, as with the front door of a microwave oven which must allow visible light while blocking microwaves - essentially a high-pass filter. Hence the name Faraday "cage" as opposed to "box"

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Would a small hole in a Faraday cage drastically reduce its effectiveness at blocking interference?

I'm shielding the pickup cavity of a guitar to minimize interference. I'm doing this with copper tape that has conductive adhesive, and I'm connecting this tape to ground. Without getting into too much detail, let's say there's a small spot I miss…
Anthony
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Wouldn't putting an electronic key inside a small Faraday cage render it completely useless?

Am I missing something? The Engadget article Kia made a tiny Faraday cage to protect your wireless key from thieves says: Many existing keyless entry systems aren't secure, but few people are likely to replace their cars just to reduce the chances…
uhoh
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Digital Signal Cables Penetrating a RF Shielded Room

Disclaimer: I'm not a trained electrical engineer...I'm a recent Computer Science grad with about ten years experience as a RF test tech. I don't know everything, and to me, experience reigns supreme for practical applications like this. I'm also…
GroundRat
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ungrounded chassis shielding

I'm looking into whether an ungrounded metal box provides good/bad EM shielding. This thread seems like a definite "good", for reasons of the box acting as a faraday cage : How much shielding does an ungrounded metal box provide? But when a similar…
user2913869
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Can you get shocked if you touch a hot wire whilst perfectly electrically insulated?

Okay this issue has been bothering me immensely so hopefully someone will be able to help me out or steer me in the right direction. Lets say hypothetically I possessed an absolutely perfectly insulating chair and I stood on it and then touched the…
SalahTheGoat
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Is it necessary to implement a sensing resistor plus pre-amp with Faraday cage on a PCB if I would like to have the range about 10nA measurement?

I put a 60 kΩ sensing resistor plus low-bias current amplifier with a gain of 500 into an aluminium bag and tied it to AGND for EMI shielding. The second stage is an ADS1256 24-bit ADC. The purpose is to try to get a lower noise level during…
Bill Lin
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Faraday Cage: incomplete graph?

I am looking to shielding for electronics, and I am reading this wikipedia article. And I wonder for this image: Say I have aluminum (Al) of 2 mm, this means I am at 2 kHz on frequency. This means that my Aluminum faraday cage of 2 mm blocks…
Christianidis Vasileios
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Solid Faraday cage with a hole for a wire

Is it possible to make a solid Faraday cage with a hole for a wire (to transmit information inside)? What is needed to prevent electromagnetic waves from going through the hole?
nvq
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Would a Faraday cage still work if it was part of a circuit?

Faraday cages protect against EM radiation and charges. As far as I understand, this effect happens through the induction of an electric field, which produces a current inside of it, which then counteracts any incoming current. So, my question: If I…
Mat NX
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How do I detect a Faraday bag?

How do I detect a Faraday bag coming into or leaving my store? The intention of detecting Faraday bags is to be aware of customers who have the ability to walk out of the store with an RFID-tagged product that hasn't been paid for.
Michael
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How much of my mixed-signal PCB should I shield with a Faraday cage?

I'm designing a PCB with an AFE (Analog Front-End) for measuring/recording bipotentials and I'm trying to determine how much of the circuit I should shield with a Faraday cage. At the moment, I'm thinking of shielding the ADC and the digital…
Dionysus
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Best shielding material for a Faraday cage against 36kHz electric fields?

I have a room aka cuboid with 4 x 3 x 2.5 meters. In the 3D center is a device under test. To shield against 36kHz electric fields I want to build a Faraday cage. I learned the hard way that aluminium foil does not really work so I am asking now…
Hansebenger
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What is the difference between a cavity resonator and a faraday cage?

In my internet research, I found that several people believed microwave ovens act as faraday cages and some said they act as cavity resonators.  I know that Faraday cages block incoming electric fields in microwaves/EMwaves, while in a cavity…
Prerna
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PCB Edge "via shield" (Faraday Cage) using Altium

I am trying to add a "via shield" to my PCB edges, which is also called a Faraday cage. I am trying to add vias using Altium software, but the vias are added outside the PCB edge and not inside. Any idea how to add vias inside the PCB edge? Above…
Vikash Kumar
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Design spec for faraday cage

I need to build a faraday cage to shield from the following source: 8 Watt, 14 MHz. The signal is AM modulated I want to build an metal box enclosing the source. I want it to shield the signal so that the AM signal cannot be received, but I want to…
Johan Kirsten
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