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  • The characteristics of a vertical mono-pole antenna with 1,2,3,4,6 or 8 . . .
    Data tables, OCF and tuning methods, graphics and discussion of the results from 4NEC2 modeling of elevated vertical dipoles with 1,2,3,4,6 or 8-radials
  • A Simple Pull-Up Mono-Band Vertical Dipole Antenna Design 4NEC2 Tutorial
    With vertical antennas, the ground model will have an enormous effect on the level of losses, far field radiation pattern, and gain For comparison purposes, I use the 4NEC2’s “Average” “Real Ground” model
  • POTA PERformer (Portable, Elevated, Resonant) Antenna - White River Radio
    an elevated vertical antenna for 40M-6M sitting on a tripod (or an extended ground spike) with the feed point about 5-6’ off the ground and two elevated tuned radials This is a fantastic portable antenna – easy to pack, fast to deploy, very effective and highly efficient And it is simple for you to build and deploy yourself!
  • Antenna Modeling With 4NEC2 - HOTARC
    Basic Modeling Approach using 4Nec2 The goals of this 30 minute presentation on 4Nec2: 1 Installation and basic set -up 2 Brief Discussion on NEC2 format 3 Basic modeling approach 4 Example model 5 Brief overview of some 4Nec2 tools What this presentation will not cover: 1 Method of Moments and RF Theory 2 NEC2 capabilities 3 All of
  • antenna - How to model my rooftop vertical on 4NEC2? - Amateur Radio . . .
    The following graphic from 4nec2 shows the radiated fields vs height AGL at a horizontal distance of 50 meters from the antenna defined by your NEC model There is significant attenuation in its fields due to the lossy ground plane, even at that short distance
  • New??? Antenna Design, 4NEC2 Modeling - RadioReference. com Forums
    The basic idea is to take a folded 1 4-wave ground plane antenna whose overall length is set to be resonant at the lowest frequency you're trying to receive, and starting a short distance above the feedpoint, periodically shunt the parallel vertical conductors with capacitors, starting with small value capacitors and small intervals, and
  • Simulation of Wire Antennas using 4NEC2 - Gunthard Kraus
    NEC (= Numerical Electric Code) is a simulation method for wire antennas, developed by the Lawrence Livermore Laboratory in 1981 or the Navy To realize this an antenna is divided into “short segments” with linear variation of current and voltage (like SPICE when simulating circuits) The results are very convenient and the
  • How to Modeling Wire Antennas for Free with Visualizations Using 4NEC2
    • Best Free tool for modeling dish antennas was GRAPS 9 Student Version from TICRA (Denmark) • Other Programs use: Geometric and Physical Optics, Uniform Theory of Diffraction, Ray Tracing and Scattering If your antenna is not large relative to a wavelength (most HF, VHF, and UHF antennas) can use techniques that involve
  • Practical Antenna Modeling Using NEC Codes - WordPress. com
    Practical Antenna Modeling Using NEC Codes With Examples of HF Wire Antennas and 4NEC2 Gary Rondeau , AF7NX Overview Describe the NEC codes How to define and edit the models Running the simulations and work flow Work some examples Using Variables Deal with Feed Lines in the models Grounds Optimization More Examples The NEC Codes
  • Antenna modelling - gw4ezw. org. uk
    4NEC2 is a (free) Windows program that adds a graphics UI and full variable parser to the NEC2 engine (can use NEC4, and with tweaking NEC5) MMANA is a (basic=free advanced=paid for) program using the MiniNEC3 engine, with a nice graphical editor, but limited expressions





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