{"id":2252,"date":"2015-04-01T00:00:54","date_gmt":"2015-03-31T15:00:54","guid":{"rendered":"https:\/\/micronix-jp.com\/?p=2252"},"modified":"2023-03-20T17:19:14","modified_gmt":"2023-03-20T08:19:14","slug":"man120_meas_j","status":"publish","type":"post","link":"https:\/\/micronix-jp.com\/english\/note\/application\/man120_meas_j.html","title":{"rendered":"Magnetic Field Strength Measurement with Loop Antenna"},"content":{"rendered":"

\nThe magnetic field strength measurement from 100kHz to 30MHz with Loop antenna, Low noise amplifier and Signal analyzer.\n<\/p>\n\n\n

Application<\/h2>\n

Connection block diagram<\/h3>\n\"Figure:Handheld\n\n\n\n

Solution<\/h2>\n

It is possible to display the magnetic field strength directly on the signal analyzer MSA538 by inputting a calibration coefficient values obtained by subtracting the gain of the low noise amplifier MAP301 from the antenna factor of the loop antenna MAN120.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Frequency (MHz)<\/th>\nMagnetic Antenna Factor
\n(dB\/m) (typ.)<\/th>\n		MAP301 Gain
\n(dB) (typ.)<\/th>\n		Antenna Factor
\n\uff0dMAP301 Gain
\n[Calibration coefficient values]<\/th>\n<\/tr>\n
0.1<\/td>\n13.5 <\/td>\n55.0 <\/td>\n-41.5 <\/td>\n<\/tr>\n
0.15<\/td>\n10.1 <\/td>\n55.1 <\/td>\n-45.0 <\/td>\n<\/tr>\n
0.2<\/td>\n7.7 <\/td>\n55.1 <\/td>\n-47.4 <\/td>\n<\/tr>\n
0.3<\/td>\n4.5 <\/td>\n54.9 <\/td>\n-50.4 <\/td>\n<\/tr>\n
0.5<\/td>\n1.1 <\/td>\n54.9 <\/td>\n-53.8 <\/td>\n<\/tr>\n
0.7<\/td>\n-0.8 <\/td>\n54.7 <\/td>\n-55.5 <\/td>\n<\/tr>\n
1<\/td>\n-2.3 <\/td>\n54.7 <\/td>\n-57.0 <\/td>\n<\/tr>\n
1.5<\/td>\n-3.3 <\/td>\n54.5 <\/td>\n-57.8 <\/td>\n<\/tr>\n
2<\/td>\n-4.0 <\/td>\n54.4 <\/td>\n-58.4 <\/td>\n<\/tr>\n
3<\/td>\n-4.2 <\/td>\n54.2 <\/td>\n-58.4 <\/td>\n<\/tr>\n
5<\/td>\n-4.5 <\/td>\n54.1 <\/td>\n-58.6 <\/td>\n<\/tr>\n
7<\/td>\n-4.1 <\/td>\n53.9 <\/td>\n-58.0 <\/td>\n<\/tr>\n
10<\/td>\n-4.1 <\/td>\n53.8 <\/td>\n-57.9 <\/td>\n<\/tr>\n
15<\/td>\n-4.2 <\/td>\n53.7 <\/td>\n-57.9 <\/td>\n<\/tr>\n
20<\/td>\n-4.0 <\/td>\n53.6 <\/td>\n-57.6 <\/td>\n<\/tr>\n
30<\/td>\n-4.5 <\/td>\n53.5 <\/td>\n-58.0 <\/td>\n<\/tr>\n<\/tbody><\/table>\n\n\n\n

System configuration<\/h2>\n\n\n\n\n\n\n\n\n\n<\/tfoot>\n<\/table>\n\n\n\n

Products introduction<\/h2>\n

Signal analyzer [MSA538]<\/a><\/td>\n x 1 <\/td>\n<\/tr>\n
Loop antenna [MAN120)]<\/a><\/td>\n x 1 <\/td>\n<\/tr>\n
Low noise amplifier [MAP301]<\/a><\/td>\n x 1 <\/td>\n<\/tr>\n
SMA(P)\/N(P)coaxial cable<\/td>\n x 1 <\/td>\n<\/tr>\n
SMA(P)\/N(J)coaxial cable<\/td>\n x 1 <\/td>\n<\/tr>\n
Loop antenna stand<\/td>\n x 1 <\/td>\n<\/tr>\n<\/tbody>\n