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| To: | [email protected] |
|---|---|
| Subject: | LF: Re: Drooping top loading |
| From: | "Dick Rollema" <[email protected]> |
| Date: | Tue, 22 Oct 2002 12:16:43 +0200 |
| In-reply-to: | <000001c2793a$fcd867a0$276336d2@xtr743187> |
| References: | <DDC408CAE72CD511827A0002A5131CD6D9F7E9@exc_wil08> |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
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To All from PA0SE In order to find the effect of drooping top load wires upon the radiation resistance I modelled an umbrella antenna using K6STI's antenna simulation program Antenna Optimizer. The antenna modelled consists of a vertical wire of 10 m with at the top four wires of 10 m each in the directions N, E, S and W. The wires include an angle of alpha degrees with the horizontal. All wires have a diameter of 1.5 millimetres. The antenna is erected over perfect ground. Alpha Rrad Capacitance (degrees) (mohm) (pF) 0 26 256 (horizontal top wires) 20 18 254 40 12 250 60 8 237 80 8 175 73, Dick, PA0SE JO22GD |
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