On Thu, 04 Mar 2004 22:31:40 GMT, "aunwin"
wrote:
....
give the pros and cons between a series
circuit and a parallel circuit from which to base a radiator ?
....
Just to give you a start a series circuit radiator is a dipole.
And we will
say a parallel circuit radiator is one with at least one capacitive lumped
circuit and one inductive lumped circuit in parallel.
....
Here is a start
A dipole provides a lot of signals at the same time( good)
A parallel circuit can only supply one signal at a time (bad )
Get the idea?
Hi Art,
A dipole is the most efficient antenna.
The parallel circuit offers loss to an already most efficient antenna.
A dipole is simple to load and often requires no matching.
The parallel circuit is difficult to load and always requires
matching.
A dipole offers a standard of gain.
The parallel circuit offers no change in gain except the prospect of
reducing it through making the antenna smaller to become a resonant
system.
A dipole is a simple construction.
The parallel circuit adds complexity which raises the prospects of
mechanical and electrical failure.
A dipole offers hazardous potentials at its tips.
A parallel circuit double that danger by offering hazardous potentials
at both its tips and its drive point.
A dipole requires isolation/insulation at its tips due to high
potentials.
A parallel circuit requires isolation/insulation at its drive point
AND its tips due to high potentials.
Is that the idea? I presume you can distinguish good/bad.
73's
Richard Clark, KB7QHC
|