rkvbobby123
Electrical
What is the purpose of Antenna in the EMC Tests. Can we not bend some tubes and make one. Can somebody explain its basics. dbm db etc.
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Antenna
- Thread starter rkvbobby123
- Start date
- Status
What is the purpose of Antenna in the EMC Tests. Can we not bend some tubes and make one. Can somebody explain its basics. dbm db etc.
You've not really provided much information, but an EMC test is looking for vulnerabilities of the victim circuit relative to radiated susceptibility, so the source needs to have an antenna to properly radiate its EM signal against the victim.
This site is not for tutorials; I would suggest using Wikipedia and other internet resources for that.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
This site is not for tutorials; I would suggest using Wikipedia and other internet resources for that.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
- Thread starter
- #3
rkvbobby123
Electrical
My question was how does it radiate EM signal to its victim. Amplifiers provide these Signals? Conic Antenna, how does it provide the signal.
Again, I suggest Wikipedia until you have a more specific question:
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
The test equipment connects a Wide frequency Signal Generator, Amplifier, antenna, sends energy through the airwaves ... energy arrives at victim. This Energy moves electrons at the victims equipment and causes the victims equipment to malfunction.
Usually, victim needs to shield the equipment.
Most equipment is an accidental antenna, with poor antenna efficiency.
Most people never realize the equipment leaks energy out or can leak in side their equipment.
In a properly sealed set of electronics, the equipment is a very very inefficient antenna.
The purpose of the EMC tests is to find out where equipment is acting like an antenna, then seal that area (usually using metal shielding), then redo the EMC tests until the level of energy received does not affect the equipment. Two type tests;
1) How much energy leaks out of your equipment (you run your equipment, and use an external antenna to measure the amount of energy that leaks out of your antenna).
2) How much energy when sent into the equipment bothers it (they put a calibrated amount of energy into your equipment from a calibrated antenna at a distance of 1 meter or 3 meters, then have that antenna move around (to represent real life where the offending antenna can be oriented in many directions) and see if your equipment malfunctions when running certain tests.
Usually, victim needs to shield the equipment.
Most equipment is an accidental antenna, with poor antenna efficiency.
Most people never realize the equipment leaks energy out or can leak in side their equipment.
In a properly sealed set of electronics, the equipment is a very very inefficient antenna.
The purpose of the EMC tests is to find out where equipment is acting like an antenna, then seal that area (usually using metal shielding), then redo the EMC tests until the level of energy received does not affect the equipment. Two type tests;
1) How much energy leaks out of your equipment (you run your equipment, and use an external antenna to measure the amount of energy that leaks out of your antenna).
2) How much energy when sent into the equipment bothers it (they put a calibrated amount of energy into your equipment from a calibrated antenna at a distance of 1 meter or 3 meters, then have that antenna move around (to represent real life where the offending antenna can be oriented in many directions) and see if your equipment malfunctions when running certain tests.
- Status
Similar threads
- Locked
- Question
- Locked
- Question
- Locked
- Question