ground antenna

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ground antenna

169 links - and 1 categories

Antennas : 160M
  • 160m portable vertical antenna - The Shoddytenna is a 160 meters band vertical antenna intended for portable use. This antenna takes just 15 minutes to erect on site, can be carried by hand and is ideal for local groundwave work.
    [ Hits: 380 | Votes: 0 | Rating: 0 ]
Antennas : 40M
  • Hairpin antenna for 40m band - A modified Hairpin antenna for a wider bandwidth an mounted on a grounded metalic mast
    [ Hits: 326 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Delta Loop Antennas
  • Delta Loop DX Antenna for 40 meters band - A monoband delta loop antenna for the 7 MHz. This vertically polarized DX Antenna is a full wavelength sngle side antenna and has a total length of 42.3 meters (137,1 inch) Can be easily setup with a flag pole or fishing pole as center top mast. For optimal performance lower side should be at 2 meter above the ground. This antenna offers a low radiation angle and 1 DB Gain.
    [ Hits: 431 | Votes: 3 | Rating: 6.33 ]
  • Delta Loop for 40 and 20 meter Band by UR0GT - This wire antenna for 40 and 20 meter band feature a good SWR. Horizontal side of the antenna is placed at two meters above the ground. Impedance of the antenna are depending by the height of the base from the ground and conditions of the ground
    [ Hits: 533 | Votes: 5 | Rating: 7.8 ]
Antennas : 40M : 40 meter Vertical Antennas
  • A very efficient half size 40 meter Vertical Antenna - A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.
    [ Hits: 735 | Votes: 4 | Rating: 8.5 ]
Antennas : 6M
  • G3JVL Vertical Antenna for 50 MHz - The G3JVL 6M ground plane vertical is a compact antenna that is ideal for portable operations. It packs away into a small bag only 1.3 metres long which is an ideal size for hand-baggage on aircraft.
    [ Hits: 244 | Votes: 2 | Rating: 9.5 ]
Antennas : 6M : 6 meter J-Pole Antenna
  • 50MHz / 6m J-pole Antenna by VK4ADC - The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarized antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
    [ Hits: 439 | Votes: 4 | Rating: 6 ]
  • J-POLE for 50MHz by IZ0UPS - The J Pole antenna is a good omnidirectional antenna that can be used for portable or fixed station usage. It does not need a ground, and neither complex feed systems. It can be homemade with simple material and in several ways.Article in Italian
    [ Hits: 244 | Votes: 2 | Rating: 10 ]
Antennas : 80M
  • 80 Meter Shortened Ground Plain Antenna - This antenna is a vertical loop antenna mounted on a 8 meters high grounded mast with an input impedance of 50 Ohms without a matching device
    [ Hits: 443 | Votes: 1 | Rating: 5 ]
  • Top Loaded Vertical Antenna for 80 Meters Band - Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
    [ Hits: 268 | Votes: 0 | Rating: 0 ]
Antennas : Baluns
  • Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
    [ Hits: 248 | Votes: 1 | Rating: 10 ]
Antennas : Helical
  • Helical Antennas -Theory - Helical antenna or helix antenna is the antenna in which the conducting wire is wound in helical shape and connected to the ground plate with a feeder line. It is the simplest antenna, which provides circularly polarized waves.
    [ Hits: 137 | Votes: 0 | Rating: 0 ]
Antennas : Longwave
  • Notes on Designing LF-MF antennas - A free book on designign LF MF antennas. The six chapters in the body of the book are limited to basic information which, combined with a little modeling or simple calculations, can be applied directly using graphs for special problems like inductor design.
    [ Hits: 266 | Votes: 2 | Rating: 9.5 ]
Antennas : Theory
  • Ground Systems as a Factor in Antenna Efficiency - A classic document originally presented in Proceedings of the Institute of Radio Engineers in 1937 and is, still today, the standard referenced by the FCC, text books and many amateur radio publications.
    [ Hits: 394 | Votes: 1 | Rating: 1 ]
  • Optimizing Ground Radials in End-Fed Antennas - An interesting article focused on defining the optimal lenght and number of ground radials in vertical, inverted-L, end-fed antennas. This article compares also the radial length vs number of ground radials to power loss in transmitted power.
    [ Hits: 432 | Votes: 1 | Rating: 10 ]
  • Practical Antenna Modeling with 4NEC2 - Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
    [ Hits: 473 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • A 40m-10m vertical antenna with elevated radials - A multiband vertical antenna for HF bands with elevated ground radials slant down at 45 degrees and acting also as guy wires.
    [ Hits: 540 | Votes: 1 | Rating: 6 ]
  • Field Day Vertical Antenna by KN5L - This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna. The design of this Field Day Antenna is not very novel and leverages ideas from Butternut verticals and ARRL publications. The one essential requirement was that the antenna can be raised by just one person. The design of this Field Day Antenna is an above ground mounted ground plane vertical.
    [ Hits: 213 | Votes: 3 | Rating: 7 ]
Manufacturers : Towers and Accessories
  • Volda Communication - Volda is specialized in telecom tower antenna line accessories such as cable hangers, coaxial jumpers, grounding buss bar kits, pole clamps.
    [ Hits: 63 | Votes: 0 | Rating: 0 ]
Technical Reference : Grounding
  • How to Ground an Antenna: aerial earthing - The antenna ground or earth system can be key to its operation whilst also being a key safety feature. This article is about grounding systems for antennas, covering different aspects of grounds made for antenna safety, or expressly for lightning or just to improve antenna performance, being ground an antenna component.
    [ Hits: 230 | Votes: 1 | Rating: 4 ]

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