log periodic antenna radiation pattern
In an earlier post we touched upon different antennas intrinsic characteristics such as gain radiation patterns directivity and VSWRIn this post we touch upon polarization and how it affects an antennas performance. Figure 2 shows the rhombic UHF antenna for TV reception used these days.
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. The polarization of an antenna is loosely defined as the direction of the electromagnetic fields produced by the antenna as energy radiates away from it. The polarization obtained from a horizontal rhombic antenna is in the plane of rhombus which is horizontal. The maximum gain from a rhombic antenna is along the direction of the main axis which passes through the feed point to terminate in free space.
The MESSENGER spacecraft was a space probe mission to the planet Mercury 20112015This was the first deep-space mission to use a phased-array antenna for communicationsThe radiating elements are circularly-polarized slotted waveguidesThe antenna which uses the X band used 26 radiative elements and can.
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