Relationship between radiated EMI measurable lower level and antenna gain
Lower levels of radiated EMI noise can be measured by using a high gain antenna.
By using a high gain antenna, lower levels of noise can be measured in radiated EMI (emission) measurements.
Measurement examples with Handheld signal analyzer MSA538E + PC software for EMI MAS530 are shown.
Antenna MAN150B and MAN150 that have different gain were used in the measuerments.
We input a weak noise-level signal of 50 MHz and compared the peak of it (upper).
The measurement results without signal input are also shown to compare the noise floor (bottom).
☆The MAN150B (Large gain) has a lower noise floor so you can clearly see the 50 MHz peak.
|Biconical Antenna MAN150|
|Stand for MAN150|
|Handheld signal analyzer MSA538E|
|Coaxial Cable ( SMAP/SMAP 4m ) MC203|
|Adapter ( NP/SMAJ ) MA306|
|PC software for EMI MAS530|
|Communication Cable USB cable MI400|
*MICRONIX Corporation reserves the right to make changes in design, specification and other information without prior notice.