Figures 4(a) and 4(b) show the XPD of on-body channels with the transmitting antenna-adopted Z-polarization in the two postures.
The simulation results of source in polarization z are foundationally similar to the analysis for XPD of scenarios ZZ-ZV and ZZ-ZH in Figure 4.
These simulation results of source in polarization [phi] also show that the polarization characteristics of the channel are obvious and depolarization hardly occurs in on-body channel with the field of source in polarization [phi], which is different from the XPD analysis of actual measured on-body channels with the transmitting antenna-adopted H-polarization as shown in Figure 6.
Caption: Figure 4: XPD of on-body channels in two postures.
Caption: Figure 5: XPD of on-body channels in two postures.
Table 2 summarizes the cross polarization discrimination, XPD
of all elements of the studied MAs at 3500 MHz.
To determine the effect of antenna XPD on diversity gain it is necessary to determine the diversity gain associated with each value of input and output correlation coefficient.
For this reason, the consideration of the effect of finite XPD on diversity gain contained in this article concentrates on the situation in which comparable signal amplitudes are present in both diversity branches.
The imperfect XPD of a practical dual-polar receiving antenna will cause a small reduction in the diversity gain, which could potentially be obtained by exploiting the partially uncorrelated nature of the signal components received with orthogonal polarizations.
In the previous analysis the term XPD was used without careful definition of its method of measurement.
The use of XPD in this article differs slightly from its general use.