A Comprehensive Test Approach on High-Power Low-Noise Intermodulation Distortion
Abstract: With the shortage of
wireless communication bandwidth resource, the radio interferences occur so
frequently. Currently, effcient frequency allocation algorithm designing and
Intermoduation Distortion (IMD) suppression are two means to rationally improve
the bandwidth resource. Therefore, four comprehensive approaches named stimulus
isolation, channel crosstalk isolation; spectrum slight offset and Auto Level
Control (ALC) leak control are proposed respectively to avoid the restriction
of the periphery system’s noise and dynamic range of measurement instruments.
Moreover, the high power and low noise detection approach, the auxiliary
components amelioration and the measurement system improvement are analyzed.
Finally, utilizing Silicon-On-Insulator (SOI) Radio Frequency (RF) switch as
the carrier to do the experiment based on Advantest 93K tester. Experiment
results show that the comprehensive optimized approaches can keep the whole
system to less than -150 dBm (nearly 170 dBc) low noise range under the large
signal cases. The actual intermodulation distortion signal could be rejected and
sampled in precise accuracy which is nearly 20% improved. What’s more, the
approaches are also beneficial to the expansion of the industrial multi-site
test.
Author: Lei Wang, Jingyi Zhang
Journal Code: jptkomputergg160162
