list emc-p...@ieee.org
Subject: Re: E-field to voltage
Date: Wed, Sep 4, 2002, 2:30 PM
We don't disagree that at 30 Mhz, 3 meters is too close for a dipole. It's
too big for the distance, even if we are often compelled to use it that
way.
In this case, however, an AF of 5 dB puts
We don't disagree that at 30 Mhz, 3 meters is too close for a dipole. It's
too big for the distance, even if we are often compelled to use it that
way.
In this case, however, an AF of 5 dB puts the dipole at about 50 MHz -- 3
meters long. The distance to the source, 3 meters at the dipole's
.
--
From: Cortland Richmond 72146@compuserve.com
To: am...@westin-emission.no am...@westin-emission.no, ieee pstc list
emc-p...@ieee.org
Subject: Re: E-field to voltage
Date: Wed, Sep 4, 2002, 10:48 AM
AMund,
That's correct. One adds the antenna factor in dB to measured dBuv
137 cm
will be vastly different than that over 5 meters.
--
From: am...@westin-emission.no
To: emc-p...@majordomo.ieee.org
Subject: E-field to voltage
Date: Wed, Sep 4, 2002, 5:20 AM
Hi all,
Assume you have a device which radiates 40dBuV/m @ 30MHz, measured at 3m
distance
AMund,
That's correct. One adds the antenna factor in dB to measured dBuv to get
the field.
Ken Javor points out that you do need to worry about being in the
plane-wave, far-field. 5 dB dipole AF is typical of around 50 MHz, where a
three meter distance is enough to be in the far field - for a
-emission.no
To: emc-p...@majordomo.ieee.org
Subject: E-field to voltage
Date: Wed, Sep 4, 2002, 5:20 AM
Hi all,
Assume you have a device which radiates 40dBuV/m @ 30MHz, measured at 3m
distance. In real life this device is placed adjacent (3m) to a dipole
antenna (radio receiver system 30
Hi all,
Assume you have a device which radiates 40dBuV/m @ 30MHz, measured at 3m
distance. In real life this device is placed adjacent (3m) to a dipole
antenna (radio receiver system 30-80MHz). Lets say the dipole antenna factor
is 5dB.
What is expected to measure on the antenna terminal ?
Can
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