Let me add my five cents to your explanation. Any small antennas when their sizes ?( either the loop antenna perimeter or the length of dipole antenna ) are physically small, say ten times of wavelength of interest, are considered electrically small antennas ( loop ?or dipole antennas ) which ?have low radiation resistance ?and non-compensated reactance.
These factors shall be taken in account regardless you deal with a broadband or narrowband antenna. However, for narrowband antenna is much easier to match up or compensate for reactance and ¡°resistiveness¡± caused by antenna.
From:[email protected] <[email protected]> On Behalf Of VE7VXO Sent: Tuesday, November 8, 2022 7:45 PM To:[email protected] Subject: Re: [loopantennas] STLcalc: the missing Linux update message attachments
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Hi Frederico
The losses impact the antenna's efficiency which is a reciprocal thing ie it affects both TX and RX, however on RX we often use very low efficiency antennas, especially when we want a broad band antenna, if it is small it is automatically inefficient (if it is broad band), but the thing is modern recievers have excess gain for HF especially the low end of HF so we can disregard the efficiency problem for RX as long as noise level increases when the antenna is connected.? Of course a highly efficient antenna will always bring stronger signals but you get the point.
