Making my own Circularly Polarized Antenna

Hello all you antenna freaks

The location of my antenna is like this.

My potential listeners in %
To the front 75%
To the rear 22%
To the right 3% (but very close less than 100m, after that its mountains only)
To the left 0% (the sea)

So I am making my own atenna to cover the area

After many design hours I have come up with one

And this is what it will look like

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*NOTE*
All measurements are with a 2m long mounting pole connected to the boom (as pic).

The polar diagram

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The SWR at my chosen frequency comes out at 1.52649
The impedance at my chosen frequency comes out at 196.479
All I need will be a 4:1 balun using RG-213 like this

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Unless I come up with a better one that is (I'm never satisfied)

BB

The Horizontal Plane at my 98.6MHz

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BB

Interesting indeed

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128

	pcs wrote:
	Interesting indeed

It cetainly is

But it's a pig to design, the position of the mast in original
design is causing SWR problems, it's very critical

So..... Back to the drawing board

Many hours later I have come up with this beauty

Design. . . . . . . >

All measurements taken as picture (with a beam, fitted to a mast)
Using the 4nec2 Program

Rear Gain 2.29dbi
Front Gain 6.05dbi
SWR 1.02579
Imp 195.791 Ohm

Gain. . . . . . . >

SWR. . . . . . . >

Imp. . . . . . . >

Hor. . . . . . . >

Ver. . . . . . . >

And the best thing is the girlfriend likes it, she says it looks sexy

BB

For some reason only small pics came out this time

Anyone interested here are the full size Pics

Design. . . . . . . > http://postimg.org/image/d45rb3p53/

Gain. . . . . . . > http://postimg.org/image/xyszlkte7/

SWR. . . . . . . > http://postimg.org/image/7t99krvch/

Imp. . . . . . . > http://postimg.org/image/3w9fbg8cz/

Hor. . . . . . . > http://postimg.org/image/kvm0e5ylj/

Ver. . . . . . . > http://postimg.org/image/6peekxwar/

BB