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Re: LF: Re: LF antennas

To: [email protected]
Subject: Re: LF: Re: LF antennas
From: [email protected]
Date: Thu, 9 Mar 2000 11:07:15 EST
Reply-to: [email protected]
Sender: <[email protected]>
In a message dated 3/9/00 4:17:45 AM Eastern Standard Time, [email protected] writes:
<< Due to its directivity, a short vertical monopole has a gain of 2.6dB over
a dipole (4.77dBi versus 2.15dBi for a dipole). >>

This is one point which may deserve some clarification. A real-world implementation of a short vertical monopole will have a net loss over most other antennas, rather than a net gain. When using the term "gain" without further description, I suspect most people take the meaning of overall or net gain. Overall gain of an antenna is, of course, the product of directivity in the vertical plane, directivity in the horizontal plane, and efficiency (related to radiation resistance and loss). It might be better to say the short monopole has a directivity advantage of 2.6dB over the dipole.
<< Although I speak English very often here at the university (thanks to -
mainly - US guys who refuse to learn Dutch even after living here for several
years) my writing is far from perfect. >>
Be assured, Rik, your spelling and grammar are a lot better than many of the
U.S. guys when they attempt to put a page together. Just as we assume anyone
will understand us if we speak loudly and slowly, we assume you'll read our
Web pages the same way and somehow absorb the meaning from them. <grin> Your
writing is eminently readable and understandable. Congratulations on a job
well done!
73,
John



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