If we assume othe average beamwidth of rhombic antenna as 10, then design an antenna system such that it will radiate maximum power over the ranges from 10 o to 40 for the operating frequency of 10mhz explain the working of open circuited long wire antenna and v antenna with radiation pattern. Rhombic antenna can be regarded as two v shaped antennas connected endtoend to form obtuse angles. We will look at a few rhombic antenna designs including an inverted v in the article below. Travelling wave, broadband, and frequency independent antennas. The half rhombic vhf antenna is a high gain, lightweight, directional antenna capable of operation over the frequency range of 30 to 88 mhz without the need for physical tuning by the operator. It covers 174 mhz 192 mhz, centered around 168 mhz. A rhombic antenna is a broadband directional wire antenna coinvented by edmond bruce and harald friis, in 1931, mostly commonly used in the high frequency hf or shortwave band.
Pdf a novel excitation source model for analysis of rhombic. If we look at this link to this pdf document on rhombic design we find. If we look at this link to this pdf document on rhombic design we find suggested dimensions for rhombic antennas. Abstracta novel vshape wirestructured pentagonal hf antenna is developed. The construction of the rhombic antenna is in the form a rhombus, as. Media in category rhombic antennas the following 12 files are in this category, out of 12 total. In this video, i have explained rhombic antenna by following outlines. Rhombic antenna basics, radiation and designing in antenna.
Which if ive done this correctly means a wavelength of 1. Cebik, w4rnl 1434 high mesa drive knoxville, tn 379384443 email. All resistors are carbon 5w, creating 10w max dissipation per leg. Due to its simplicity and ease of construction, it has many uses. Rhombic termination resistor termination resistor needs to be near 800. Rhombic antenna can be regarded as two vshaped antennas connected endto. Rhombic antennas were the ultimate antenna design back in the golden age of wireless. Vertical half rhombic and longwire antennas 614 yagi antenna 614 vee antenna 616 sloping vee antenna 616. Rhombic tv antennas unlike the conventional type of tv an tennas which use aluminum tubing and other material that can only be made in a modern factory, this type of antenna uses ordinary copper wire, insulators and poles, and is put up in much the same manner as the ordinary outside radio antenna which has been built by. Rather than tiptoe up to trying to get in stations with rotators and larger and larger deep fringe antennas i found the rhombic antenna. In this video, i have explained v antenna by following outlines.
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