You should be able to… Construct a vertical ground plane with one vertical element, and two radial elements, from readily available parts. The final result is I have a new location for the antenna which is more XYL friendly, does not spoil the view of our sunsets and is ready to accept my new 43 foot antenna, ground radial installation and coaxial cable routing. antenna) was used commonly in amateur and commerical antenna systems for more than 10 years. Using the threads, I could then mount another water pipe to it using a threaded coupler, and then mount the antenna … For vertical antennas with an impedance greater than 50 ohms you will need a step up impedance transformer (e.g. x 7.5 in. In this case, it’s a multi-band antenna the customer is using (it can be used from 700 MHz – 2700 MHz) so the ground plane required could be anywhere from 4 … The amount/size of the “ground-plane” required for the optimal performance of a monopole antenna is determined by the frequency you are transmitting/receiving at. element to boom plate 2 DX-Engineering DXE-SAD-075A 3/4 inch saddle clamps 4 DX-Engineering DXE-CAVS-2P 1.5 inch saddle … To function as an antenna ground plane… Proper Antenna Grounding - posted in Technical Discussion: OK, being new to base station and repeater building I have a very important question. 25 ohm load to 50 ohm coax, also know as a 1:2 unun). 1 EX-Engineering DXE-MMP-P2 polymer plastic 25 in. To explain my setup: I will be installing a gable antenna mount which has a 6 extender pole on my single story home. You should use an RF choke balun in the transmission line to prevent RF from traveling back to the radio shack over … This is pretty much the system I used for my 43-foot ground mount vertical. It is found that for a monopole antenna like a quarter wavelength vertical, the ground acts as a plane to reflect the radio waves so that an image of the top half of the antenna is seen in the Earth. To raise For vertical antennas with a feed point impedance less than 50 ohms, you will need a sub-ratio impedance transformer (e.g. 100 ohm load to 50 … x 11.5 in. The ground stake at the base of my inverted-L antenna provides a place for the antenna current to flow, at a true ground potential relative to the antenna potential. It is possible to simulate this function by replacing the real earth with a conducting plane. As the counterpoise was developed, its usual configuration became a symmetrical pattern of radial wires used as the "artificial ground" under electrical- ly short (one quarter wavelength or less) vertical antennas, as … Note, however, that, For best performance, the ground plane antenna should be isolated from the tower structure. The antenna is simulated over "real" ground of "medium" conductivity (Sommerfeld model), with the lower set of elevated radials .05 $\lambda$ above ground and .01 $\lambda$ vertical separation between the radial sets to prevent shorts. A single band 1/4 wave ground plane vertical antenna can be installed atop a tower. The ground stake near the house provides a place for the common mode noise current to go, far from the antenna where it cannot couple significantly. The antenna … More engineering would have to be done to result in a practical design. What is the best way to ground a fiberglass antenna? It sets up in about 20 minutes – so make sure that mounting pipe is straight up and down so the antenna won’t be leaning. Simple CB Base Station Antenna: This is a simple base station CB antenna You can make in 30 minutes out of a bit of PVC pipe and fittings, some wire and a SO239 coax connector and a piece of coax to connect it to your radio. If you put up a vertical with a poor radial system you usually get a good match because the ground LOSS adds to the 36 ohms to get you at or near 50 ohms, but with a big drop in signal strength. Stay tuned for upcoming posts. You should have a 1.5 SWR on this. As more radials are added the impedance of the antenna drops, over perfect ground a vertical is 36 ohms. A feed point impedance less than 50 ohms you will need a sub-ratio transformer. 43-Foot ground mount vertical which has a 6 extender pole on my single story...., the ground plane vertical antenna can be installed atop a tower this... 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