To Eznec users (quad loop vs dipole)

FM antenna discussion
Post Reply
User avatar
Patrick73
Posts: 305
Joined: 22 Mar 2015 12:36
Location: french Alps, JN35am

To Eznec users (quad loop vs dipole)

Post by Patrick73 » 23 May 2019 20:02

Hi there !

Does anyone master Eznec, or similar software ? I want to know the "real" gain of a band 2 quad loop (312 cm perimeter) and the F/B value.
Some documents state it equals a 3 elements Yagi (5 dBd), some other say it's barely better compared to a half-wave dipole (2.15 dBi).

In the end, I'm a bit confused with those conflicting informations.

Thanks !
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

satnipper
Posts: 1179
Joined: 03 Oct 2014 12:58
Location: Western Europe

Re: To Eznec users (quad loop vs dipole)

Post by satnipper » 24 May 2019 12:42

It’s in between those two extremes. See

https://www.w8ji.com/delta_loop.htm

User avatar
Patrick73
Posts: 305
Joined: 22 Mar 2015 12:36
Location: french Alps, JN35am

Re: To Eznec users (quad loop vs dipole)

Post by Patrick73 » 25 May 2019 08:34

Hi Stuart,

Thanks for the interesting link.

According to some comments, I think it's actually irrelevant to build a quad loop, though it seems quite effective for some people ("The quad has no gain over a dipole, and actually can have loss, at heights where the dipole has a vertical pattern null, such as 1/2 and 1 wavelength. The standard horizontally polarized quad element is less effective than a dipole at mean heights below 1/2 wave."). Thus, I will limit myself to the dipole when I need a compact antenna.
Patrick
Main interests : NDB, MW & FM DX'ing
REU Editor http://www.classaxe.com/dx/ndb/reu

Post Reply

Return to “Antennas”