name: XPD
full_form: Cross-Polar Discrimination of the antenna
context: Figure B.2.1.10-2: Common calibration approach based on calibrating the polarization matched signal paths In the remainder of this analysis, it is assumed that the leakage between the two polarization ports of the measurement probe is assumed to be the same, i.e., XPD = XPDï±ï¦ = XPDï¦ï± and ï¡ = ï¡ï±ï¦ = ï¡ï¦ï±. The normalized powers at the measurement probe terminals can then be written as (1.3) (1.4) The normalized ratio of total powers at measurement probe and the centre of the quiet zone is therefore (1.5) This simple analysis shows that the XPD of the measurement probe introduces a small error of the total power measured by the measurement probe and that the conservation of measured powers is not guaranteed, i.e., the MU based on the XPD can be expressed as (1.6) This XPD MU is tabulated for different levels of XPD in Table B.2.1.10-1. Table B.2.1.10-1: XPD MU for different XPD values When the range reference calibration is based on a full matrix-based approach, i.e., all signal paths are
description: Cross-Polar Discrimination (XPD) of an antenna refers to the ratio of the power received by an antenna in its co-polarized state to that received in its cross-polarized state. It is a critical parameter in evaluating the performance and accuracy of antenna measurements, particularly in scenarios where polarization mismatch can significantly impact signal quality.
explanation: The context describes XPD as a measurable attribute directly influencing antenna performance and measurement accuracy. This aligns with the definition of a 'Parameter' as a quantifiable characteristic affecting system behavior.
section_title: B.2.1.10Influence of the XPD
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