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Are you sure on the noise? More signal, yes... I figured the narrower beam width and higher F/B ratio, all the noise from those directions will be suppressed, more so than in the M3. Perhaps the higher gain will more than offset this? I would expect the noise to be roughly equal if anything else.

A loop is far quieter than a dipole and has gain over a dipole. That is just my experience, not that has anything to do with the beams we are discussing, just noting the affect an antenna can have on received signal and noise.

Here is a handout hosted on the Stanford University site, not notable for their studies in RF/Microwave, but the section on Antenna Temperature is a little interesting.

http://www.stanford.edu/class/ee252/handouts/antenna_noise.pdf

It is interesting to note also that the OP says the M5 has much stronger TX, so being the antenna is a passive reciprocal device, how could that be...

<blockquote data-quote="C2" data-source="post: 482105" data-attributes="member: 568">Are you sure on the noise? More signal, yes... I figured the narrower beam width and higher F/B ratio, all the noise from those directions will be suppressed, more so than in the M3. Perhaps the higher gain will more than offset this? I would expect the noise to be roughly equal if anything else.A loop is far quieter than a dipole and has gain over a dipole. That is just my experience, not that has anything to do with the beams we are discussing, just noting the affect an antenna can have on received signal and noise.Here is a handout hosted on the Stanford University site, not notable for their studies in RF/Microwave, but the section on Antenna Temperature is a little interesting.<a href="http://www.stanford.edu/class/ee252/handouts/antenna_noise.pdf" target="_blank">http://www.stanford.edu/class/ee252/handouts/antenna_noise.pdf</a>It is interesting to note also that the OP says the M5 has much stronger TX, so being the antenna is a passive reciprocal device, how could that be...</blockquote>

[QUOTE="C2, post: 482105, member: 568"] Are you sure on the noise? More signal, yes... I figured the narrower beam width and higher F/B ratio, all the noise from those directions will be suppressed, more so than in the M3. Perhaps the higher gain will more than offset this? I would expect the noise to be roughly equal if anything else. A loop is far quieter than a dipole and has gain over a dipole. That is just my experience, not that has anything to do with the beams we are discussing, just noting the affect an antenna can have on received signal and noise. Here is a handout hosted on the Stanford University site, not notable for their studies in RF/Microwave, but the section on Antenna Temperature is a little interesting. [url]http://www.stanford.edu/class/ee252/handouts/antenna_noise.pdf[/url] It is interesting to note also that the OP says the M5 has much stronger TX, so being the antenna is a passive reciprocal device, how could that be... [/QUOTE]

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