Radiation Influence of ACP Probe in S-11 Measurement

The on-chip strip dipole antenna is measured for reflection coefficient with different GSG probes at W band. The manufactured antenna simulation is compared with three different measurement results which are realized using Infinity@ and ACP probes. Although the simulation and measurement results obtained from Infinity probes are in good agreement, however, the result of ACP probe shows discrepancy with the other measurements. Therefore, the model of ACP probe tip is employed in simulation to feed the antenna and show the radiation effect of the ACP probe tip. The ACP probe circuit is then de-embedded from the simulated S-11 using the software calibration of the probe. Finally, the measured S-11 via ACP probe is compared with the simulated/de-embedded result.