What will happen to the side lobes? What will happen to the front-to-back ratio? How much wider would the bandwidth be with a folded dipole? Would folding the dipole change anything else? Would changing to a gamma match change the bandwidth? In which direction and how much? How would adding another driven element, another director, or another reflector change all these things? What would be the effects of changing the dipole driven element How much wider will the bandwidth be with 12 AWG rather than 14 AWG wire? Will the feed impedance match the feedline better if the antenna is raised slightly higher? If the feed impedance changes, how will that affect the bandwidth? Will the resonant frequency change? In which direction and how much? What will the height increase do to the radiation pattern? What effect will it have on main-lobe gain.
If that is your situation, this step-by-step inverted-coat-hanger antenna design example won't teach you everything there is to know about MMANA, but it will get you started, and probably will get you hooked.īe forewarned that it won't take you long to learn the basics so you can start modeling your own antennas, but it may be days, weeks or months, before you "surface for air," because it seems the results from every new antenna design raise more questions you won't be able to resist exploring.
#Mmana gal download how to
All that combines to leave many first-time-users wondering how to begin, and if they do begin, wondering whether the results they obtain are valid.
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However, there are important issues that can totally invalidate results, there are some annoying software bugs to avoid, many program capabilities are not immediately obvious, and the documentation is limited. It can model a wide range of antenna types, calculate radiation patterns, power gains, front-to-back ratios, feed impedances, bandwidths, the effects of loading inductors, capacitors and resistors, the effects of resonant traps, the effects of some types of transmission lines, and other things of interest to anyone interested in antennas. M MANA is a powerful antenna modeling program that is fascinating to experiment with. MMANA Antenna Modeling Program Tutorial, Part 1 A step-by-step inverted-coat-hanger antenna MMANA modeling program design example
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