MPDRAMichigan Purebred Dog Rescue Alliance (Dexter, MI)
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As compared to the RDRA, MPDRA with small metal plate there is reduction in resonant frequency.
Figures 4-7 show the measured radiation patterns of the proposed RDRA and MPDRA respectively with co-polar and cross-polar characteristics.
As MPDRA gives maximum bandwidth among the proposed antennas, Figure 8 shows Smith chart plot of impedance locus versus frequency of the proposed antenna wherein it validates that presence of two loops on the Smith chart proves dual frequency functionality with better impedance matching characteristics between the input and the load.