Anyone know how can i design antenna for electric field detection. i m trying to make contactless Ac mains Detector which range is near about 1-mtr long.
my question is about possibility of antenna construction for electric field sensor. but as i calculate the wavelength (for 50hz) is around 6*10^6km its mean the antenna height (lambda/4) is equal to 1500km long. so this is very difficult to construct. i need some pcb mounted antenna for that. is anyone have an idea please help me out.
$\begingroup$
$\endgroup$
5
-
$\begingroup$ If your calculations are causing errors, you could show them here and we can look at that. $\endgroup$– joseph hDec 21, 2020 at 7:29
-
$\begingroup$ no sir i m not doing any calculation till now. bcoz i have no idea how to start from beginning. i have an idea only about calculation of microstrip patch antenna @Dr jh $\endgroup$– Er.rhtDec 22, 2020 at 10:32
-
$\begingroup$ If you are doing a calculation (as in your question you stated but as i calculate the wavelength (for 50hz) is around 6*10^6km its mean the antenna height (lambda/4) is equal to 1500km long) ....a six billion meter wavelength seems a bit off don’t you think? $\endgroup$– joseph hDec 22, 2020 at 22:55
-
$\begingroup$ just can tell me how do i start for calculation $\endgroup$– Er.rhtDec 23, 2020 at 4:10
-
$\begingroup$ which type of antenna is best for this application $\endgroup$– Er.rhtDec 23, 2020 at 4:11
Add a comment
|
1 Answer
$\begingroup$
$\endgroup$
1
this can be easily done by making your "antenna" in the form of a loop consisting of many turns of wire, surrounding the AC mains line. This coil then becomes the secondary winding of a transformer in which the AC mains line is the primary. For this to work, only the HOT line of the two-wire AC mains should go through the loop- NOT both of the lines, and a load (like a small heater, etc.) must be connected to the AC mains, so that current will be flowing.
You can buy a tool called a clip-on ammeter probe which is a miniature version of what I have just described. You then connect the output plug of the clip-on probe to the input of an oscilloscope, on which you can monitor the mains signal.
answered Dec 21, 2020 at 19:40