Impedance calculations and measurements
In the table below are lists calculated (Z1) and measured (Z2 and Z3) impedances of the antenna dipoles in the bandwidth of the antenna from 85 to 95 MHz.
| Frequency | Calcuated | Measured | Measured | |
| ant# | Z1 | Z2 | z3 | |
| MHz | norm. | norm. | norm. | |
| 95 | 1 | 1.2+j0.5 | 1.7+j0.4 | 0.9+j0 |
| 2 | 0.7-j.2 | 1.8+j0.3 | ||
| 92.5 | 1 | 1.1+j0.2 | ||
| 2 | 0.8-j0.1 | |||
| 90 | 1 | 0.9-0.1 | 1.1+j0.1 | 0.9+j0.1 |
| 2 | 0.9+j0 | 1.1+j0 | ||
| 87.5 | 1 | 0.7-j0.4 | ||
| 2 | 1.0+j0.2 | |||
| 85 | 1 | 0.6-j0.8 | 0.6-j0.5 | 1.0+j0.1 |
| 2 | 0.8+j0.7 | 0.6-j0.6 |
Z1:
The calculated impedances (averaged over solar panel angle) of the two dipoles (ant#1 and ant#2) at the points where they are to be combined, (i.e. after the transformation of the impedance to 50 Ohm, and for one antenna (ant#2) further a 90 phase transform), are listed in the table below. Note that the reactive component of the two dipoles have opposite signs and varies in the opposite sense, so that these reactive components will tend to cancel each other and produce a combined impedance closer to being real at 50 Ohm.
Z2:
The measured impedances of the individual dipoles after transformation of the impedance.
Z3:
The measured impedance of the combined dipoles after transformation to 50 Ohm and a 90 degrees phase shift for ant#2.