Plots


 Frequency characteristics

   Push the Plot button at the bottom of the optimization window to calculate the frequency characteristics of the antenna. Make sure that you have calculated the antenna model at least once before you use this function.

   Speculation button: MMANA-GAL calculates the antenna model with a little frequency offset and speculates the frequency characteristics around the center frequency. MMANA-GAL uses a linear approximation for R, Ga, and F/B. MMANA-GAL assumes that the antenna is a serial resonance circuit and speculates the jX and SWR. MMANA-GAL cannot speculate the far field pattern, Hi.

   All points button: MMANA-GAL calculates the antenna model at all five points and plots the graph.

   Detail button: MMANA-GAL calculates the antenna model at intermediate frequencies as well as the grid points. This is useful for obtaining the antenna characteristics in the wide frequency range. The number of intermediate points can be set in the property window.

   Resonance button: MMANA-GAL first calculates the resonance frequency of the antenna and shows the Fo in the Z graph. Care should be taken that it takes substantial time for the calculation if you put the frequency that is very far from the resonance frequency.

   Setup: You can calculate the antenna model having a matching circuit. MMANA-GAL assumes that the matching section is composed of no-loss lumped-constant LC circuit. If you turn it on, MMANA-GAL always supposes a perfect matching circuit is attached.

   It should be noted that these values are calculated from the jX transition on the assumption that the antenna is a serial resonance circuit. Therefore, the values would not be valid for some kinds of antennas. In addition, the error of them is not small if the frequency for the calculation is far from the resonance frequency.

  The beam pattern chart in the far field page superimposes all the results. If you want to focus on one of the results, click on the frequency you want to see, or click on ON field. The results marked with On are displayed.

Push the Print button to invoke a print dialog box. Z, SWR, and Ga/FB charts are printed in a sheet. The far filed pattern is not printed.