ELNEC is a powerful but easy-to-use program for modeling and analyzing antennas. A wide variety of antenna types and parasitic structures may be modeled The far-field pattern of an antenna, including gain, can be plotted on an ARRL-type (logarithmic-dB) or linear-dB polar plot, or presented in tabular form. All outputs, including plots, can be printed on a standard dot-matrix printer or HP LaserJet or DeskJet printer. A special ANALYZE feature tells you the forward gain, front-to-back or front-to-side ratio, beamwidth, angles of 3-dB pattern points, major sidelobe level, and front-to-sidelobe ratio. The points which ANALYZE finds can be included on the plot to verify that ANALYZE has measured what you thought it had. In addition, you can display or print the voltage, current, impedance, and SWR (for a 50- or 75-ohm system) at each excitation source, the voltage, current, impedance, and power loss of each load, and the current distribution on each wire. The antenna description may also be printed ELNEC offers an easy, menu-based system for describing and modifying the antenna. Unlike MININEC, ELNEC doesn't require a tedious and error-prone counting of "pulses" to determine where a source or load is placed. And once placed, the source or load stays where it belongs when the antenna is modified. (This feature is described in more detail in the REFERENCE chapter, p. 46.) Many special features are included to make modifications fast and simple; for example, wires can be added, deleted, or tilted, or wire lengths or antenna height changed, with a few keystrokes Antenna descriptions and patterns are easily saved and recalled from disk files
