radiation pattern for a

radiation pattern for a

Antennas : 20M

• 20m delta loop  ^pop - This antenna is fed for vertical polarisation, to give a low angle of radiation for DX and also a nearly omni-directional radiation pattern.
  [ Hits: 65723 | Votes: 69 | Rating: 6.71 ]

• Halo and Stub antenna for 50MHz and 70MHz - Omni-directional mixed polarisation antenna for 50MHz & 70MHz. This is a simple Halo and Stub antenna which provides an omni-directional radiation pattern with mixed polarisation, which I built for use with the SUWS WEB SDR
  [ Hits: 137 | Votes: 1 | Rating: 9 ]
• End-fed 6-meter Zepp - A half-wave antenna can be end-fed or center-fed. An end-fed half-wave antenna may offer mechanical and construction advantages over a center-fed antenna. The radiation pattern for an end-fed half-wave antenna is no different than a center-fed half-wave antenna.
  [ Hits: 174 | Votes: 2 | Rating: 9 ]

• Tri-Band J-Pole - This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands
  [ Hits: 1922 | Votes: 5 | Rating: 9 ]

• A Multi-band HF loop antenna - The multi band HF loop antenna, a good performer on 80 and 40-10 meters. This excellent article covers all aspects of designing a resonant loop antenna, examining gain and radiation patterns, and describing practical notes on how to build this antenna.
  [ Hits: 11239 | Votes: 26 | Rating: 6.76 ]

• Rhombic Antenna for Shortwave Radio Broadcasting - Rhombic antenna for shortwave radio broadcasting, general description and radiation patterns
  [ Hits: 2806 | Votes: 1 | Rating: 10 ]

• Antenna Height Theory - Antenna mounting height, the higher the better? Learn how radiation pattern change, and decide if you need an higher or a lower angle for your dx needs.
  [ Hits: 1878 | Votes: 5 | Rating: 7.2 ]
• Radiation Characteristics - Tailoring Patterns for HF Verticals
  [ Hits: 246 | Votes: 0 | Rating: 0 ]
• Variations on a Dipole - Antenna patterns are all about interference. Presentation on wire antennas for HF bands. Dipoles, horizontal and vertical dipoles, effects of ground on radiation patterns, multi-band wires antennas. Knowing what you should expect from the radiation patterns for waves on your wires will help you choose what will work best for your needs. The principles of interference can lend insight into what to expect from a wire antenna.
  [ Hits: 98 | Votes: 0 | Rating: 0 ]

• Understanding Antenna Gain in a Few Minutes - A collection of videos on antenna gain and explanations of how some antenna designs may perform better than others based on how their radiation pattern is drawn. Understanding how one antenna can gain more in reception and transmission than another can be complicated, but with these videos the author has without any doubt made it easier.
  [ Hits: 84 | Votes: 0 | Rating: 0 ]

• Yagi Designer - Program that produces antenna radiation patterns and graphs for SWR, forward gain, and F/B ratios
  [ Hits: 22768 | Votes: 64 | Rating: 6.31 ]
• 4NEC2 antenna modeler  ^pop - 4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler. Can be interfaced to HFwin32 propagation prediction software.
  [ Hits: 30104 | Votes: 131 | Rating: 7.32 ]
• AN-SOF - Professional Antenna Simulation - AN-SOF is a professional comprehensive software tool for the modeling and simulation of antenna systems. AS-SOF allows to describe antenna geometry, Choose construction materials, Describe the environment and ground conditions, Describe the antenna height above ground, Analize radiation pattern and front-to-back ratio, Plot directivity and gain, Analize input impedance and VSWR,Predict antenna bandwidth
  [ Hits: 242 | Votes: 2 | Rating: 10 ]