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Dual-polarised dielectric-loaded monopole antenna for wideband communication applications

Dual-polarised dielectric-loaded monopole antenna for wideband communication applications

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A dual-polarised dielectric-loaded monopole antenna for wideband communication applications is presented. The antenna is constructed by using two antenna elements orthogonal to each other. The antenna element consists of a microstrip-line-fed printed monopole with a finite truncated ground loaded with a dielectric resonator (DR). First, the antenna element is designed, fabricated and experimentally tested. Then the proposed design was extended to develop a dual-polarised antenna. The antenna impedance match is better than 10 dB over 91.3% from 4.4 to 11.8 GHz for both polarisations and the measured isolation between the two polarisation ports is better than 20 dB within the frequency band of interest whereas the maximum isolation achieved is ∼27 dB. The cross-polarisation levels in both planes are better than 20 dB. Both theoretical and experimental results in terms of return loss, isolation and radiation pattern are presented and discussed.

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