Talk:Shortwave broadband antenna

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ITU Bands edit

Latest comment: 7 years ago2 comments2 people in discussion

This article claims that HF is generally considered to be 2MHz to 30MHz. The ITU HF designation refers to the range 3MHz to 30MHz. Is the 2-3 MHz band portion referred to in the article a mistake or is it popular with amateurs (or similar) and generally considered part of HF for convenience? --Spuzzdawg (talk) 23:05, 16 October 2015 (UTC)Reply

Please read Shortwave_radio#Frequency_classifications. --Glenn (talk) 19:10, 13 April 2017 (UTC)Reply

Commercial advertisement for Robinson-Barnes antenna edit

I commented out about half of the text in the subsection on the Robinson-Barnes antenna, put some of the rest into a citation, and demoted the subsection to yet another bullet item. The text seems to be mere marketing for the Bushcomm company that sells the Robinson-Barnes antenna. The commented-out part also appears to be deceptive: It claims that the Robinson-Barnes antenna is more efficient than a dipole, but doesn't specify the frequency at which the comparison is made. (At the dipole's resonant frequencies, it will certainly be much more efficient than the resistively-terminated Robinson-Barnes antenna, which is in fact a folded antenna: Its electrical length, not counting the termination, is longer than its end-to-end length.)

Example antennas – section needs a tidy-up edit

I added off-center fed (Windom) antennas to the list, since they certainly are a widely used, simple, multi-band, nearly-omnidirectional antenna. However they have huge gaps in coverage, so might not qualify.

In a similar vein, there are several bullets in the Examples section that overlap: "Traveling wave antennas" is a very generic category that covers several of the more specific antenna types present (Robinson-Barnes, T2FD, TC2M) and several more that are left out (Rhombic, terminated delta = resistively terminated loop, Beverage). All that they really have in common is that they have a resistor in them, and actually, the "traveling wave" effect is a receive-only phenomenon. I'm not sure how this ought to be sorted out.

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