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Performance Of Polarization Diversity In a Linear Array Antenna | ||
| JOURNAL OF THI-QAR SCIENCE | ||
| Article 1, Volume 2, Issue 3, 2011, Pages 171-180 | ||
| Author | ||
| Amean Sh. Ghazi | ||
| Abstract | ||
| AbstractMultiple antennas systems require a separation distance between these antennas greater than or equal half wavelength. In this paper, we study the ability to reduce these separation distance by virtue of polarization diversity, i.e each two adjacent antenna replaced by one dual polarized antenna .The obtained results show that the use of polarization will reduce the required separation distance between antennas and the performance will be best, and these improvement will be more useful at the systems with greater number of antennas, increasing the correlation between antennas due to the separation angle will reduce the channel capacity. The results also show that increasing cross polarization discrimination XPD will increase channel capacity at low level of signal to noise ratio (SNR) and decrease it at high level of SNR if the attenuation for horizontally polarized signal is the same as that for vertically polarized signal(CPF=0),but if (CPF 0) then low values of XPD will improve channel capacity specially at high level of SNR. The results also prove that channel capacity inversely proportional with CPF at rural area (XPD 0),and when XPD=0 (urban area) the channel capacity increase as CPF increase at high level of SNR, and decrease as CPF increase at low level of SNR. | ||
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