Biquad antenna reflector design: Does it need to be a groundplane or float?

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I am unclear from the various designs put out on the web. To me it appears that
if the reflector itself is connected to the coaxial cable, it then becomes a
part of a semi-dipole that now forms between the 2 antenna terminals. One leg of
the dipole is the reflector and the other is the other signal terminal.
So we have a case of a biquad and this qasi dipole being in parallel?

Re: Biquad antenna reflector design: Does it need to be a groundplane or float?
On Thu, 01 Oct 2015 18:37:59 +0000, Sudhir Brahma

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Nope.  Two random twisted pieces of metal do NOT magically make a
usable dipole antenna.  The biquad is basically two full wave loops in
parallel, with a reflector behind it.  The reflector is usually
grounded to the coax cable shield, although it will work equally well
if it were floating.  For example, this reflector is not grounded and
works acceptably:
<http://802.11junk.com/jeffl/antennas/biquad2/index.html

More:
<http://802.11junk.com/jeffl/antennas/Biquad/index.html

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