Best Modeling INFO
Updated: Nov 23, 2021
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An interesting feature of traveling-wave wire antennas which are terminated with a load resistor. On account of this, the forward transmit power gain is lower than what might have been otherwise. Therefore, a practical antenna of this type will have higher gain in receive mode due to Receive Directivity Factor (RDF) than the forward power gain in transmit mode
This has led to a myth, especially amongst a large section of amateur radio operators that these antennas are receive-only antennas and not suitable as transmitting antennas. Nothing can be farther from the truth. One must realize, that some of the other popular antennas which are commonly used by amateur radio operators too have a differential between the RDF gain and power gain. Though it is true that the differential is more pronounced in the case of these antennas.
Unlike multi-band resonant wire antennas, the traveling wave antennas have a uniformly directed radiation pattern which does not change drastically with the frequency band of operation. In other words, the direction of the radiating lobes of traveling-wave antennas remains more-or-less same irrespective of the operating band, whereas, in the case of multi-band resonant wire antennas, the direction of azimuth orientation of the main lobe may differ from band to band.