Talk:Shortwave broadband antenna

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ITU Bands[edit]

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.