You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

While this is an old post, some things need to be addressed. First, the Antron 99 is a 1/2 wave antenna, and if anyone said that someone calls it a 1/2wave over a 1/4 wave, I can only imagine they were referencing the input impedance is the same as a 1/4 wave ground plane antenna, because a half wave over a 1/4 wave is 3/4 wave, which has the same input impedance as a 1/4 wave, but slightly less gain at the horizon. But to be clear, the Antron 99 is just a half wave antenna, with no less gain than a half wave dipole, and there is no way to get a radiator of one length to impersonate a radiator of another length.

If the schematic above for the matching network is accurate, then it is a very effective and fairly broad banded solution, that they avoid using a transformer and a counterpoise for impedance matching. So here's the lumped solution:[ATTACH=full]66235[/ATTACH]

<blockquote data-quote="HarryUSA" data-source="post: 827672" data-attributes="member: 66389">While this is an old post, some things need to be addressed. First, the Antron 99 is a 1/2 wave antenna, and if anyone said that someone calls it a 1/2wave over a 1/4 wave, I can only imagine they were referencing the input impedance is the same as a 1/4 wave ground plane antenna, because a half wave over a 1/4 wave is 3/4 wave, which has the same input impedance as a 1/4 wave, but slightly less gain at the horizon. But to be clear, the Antron 99 is just a half wave antenna, with no less gain than a half wave dipole, and there is no way to get a radiator of one length to impersonate a radiator of another length.If the schematic above for the matching network is accurate, then it is a very effective and fairly broad banded solution, that they avoid using a transformer and a counterpoise for impedance matching.&nbsp; So here&#039;s the lumped solution:[ATTACH=full]66235[/ATTACH]</blockquote>

[QUOTE="HarryUSA, post: 827672, member: 66389"] While this is an old post, some things need to be addressed. First, the Antron 99 is a 1/2 wave antenna, and if anyone said that someone calls it a 1/2wave over a 1/4 wave, I can only imagine they were referencing the input impedance is the same as a 1/4 wave ground plane antenna, because a half wave over a 1/4 wave is 3/4 wave, which has the same input impedance as a 1/4 wave, but slightly less gain at the horizon. But to be clear, the Antron 99 is just a half wave antenna, with no less gain than a half wave dipole, and there is no way to get a radiator of one length to impersonate a radiator of another length. If the schematic above for the matching network is accurate, then it is a very effective and fairly broad banded solution, that they avoid using a transformer and a counterpoise for impedance matching. So here's the lumped solution:[ATTACH type="full"]66235[/ATTACH] [/QUOTE]

Top Bottom