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Gaussian cluster antenna array data
On 3 May, 18:23, "Frank's"
wrote: Frank, Your comment about segment taper dimensions not being shown I use tapered telescopic fibre glass fishing poles for elements(they cannot fall apart only get tighter) and therefore segments do not come into the equation. I adhere .002 inch aluminum foil to the exterior for conduction and place glass fibre tape along the length if there is a question of environment problems, tho ice easily slides down in the absence of clamps. Also insert foam at ends to prevent occillation. Note. It is sometimes convenient to insert solenoids wound on plastic syringes within the elements to create a dual or multiband antenna which would duplicate the IR antenna with respect to band coverage. Aluminum has become so expensive and fishing poles so inexpensive that if you are experimentaly minded the choice becomes obvious( see Ebay for poles) I also use scrap circuit boards as element to boom connections since element weight is best kept down ( don't use my military rotor , prop pitch, anymore since antenna boom length and weight and torque requirements is no longer a factor). It was wind sway on a 60 foot boom that forced me to re think things tho I am not responsible for all those windmills that have just been planted in Central Illinois but they do emphasise my past predicaments. Best regards Art factors are now a thing of the past. Code modifies as shown below: CM Gaussian Array CE GW 1 30 273.3 164.1 820 25.1 203.3 1079 0.65 GW 2 41 171.1 202.1 582 321.6 178.4 1036.5 0.65 GW 3 31 2.1 206.5 701.2 153.5 194.5 1038.1 0.65 GS 0 0 0.025400 GE 1 -1 0 GN 2 0 0 0 13.0000 0.0050 EX 0 3 16 0 1 0 FR 0 5 0 0 14.15 0.05 LD 5 0 0 0 3.08E7 RP 0 1 361 1000 63 0 1 1 EN Third element fed in the center. NEC 4.1 Computes at 14.25 MHz: Gain 5.4 dBi F/B ratio 7.9 dB TOA 27 deg. Zin 66.8 - j 32.5 Max currents (1V peak applied to TAG 3): TAG 1 0.0022 mA (peak) TAG 2 0.0037 mA (peak) TAG 3 0.0134 mA (peak). Frank- Hide quoted text - - Show quoted text - Frank, I stated quite clearly that the elements stated had mirror images on the other side of the antenna array so why are you only considering only three elements? Remember, I stated that to simplify things I have varied ONLY the height of the individual elements with respect to each other. I have NOT introduced variance in length, diameter, skew, material or any thing else which is required for the ultimate Gaussian array i.e. For maximum effect all cartesian coordinates and related dimensions must be variable to obtain the optimum condition of equilibrium. For simplicity I have varied ONLY the height of individual elements while holding to parallelism to each other and to the earths surface . ART |
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