Adjustment
of the both antennas is simple. A SWR meter or HF bridge (see
References [1])
is connected to feed points of the tuned antenna. Gradually shorten
moustaches (symmetrically each moustache) of the antenna to minimum
SWR or when antenna input impedance is just active (have no reactance)
at needed frequency. At shortening moustaches the moustache wires
roll up to a little coil.
Input Impedance
of
10meters Band Window Dipole Antennas with Capacitive Loads
Theoretical
parameters of the antennas (copper, wire in 1mm (18 AWG) diameter) were simulated with
the help of MMANA. Figure 13 shows input impedance of the antenna
shown in Figure
11. Theoretical input impedance of the antenna is 22
Ohms. Practically measured input impedance of the antenna was
30 Ohms. Losses in neighbor objects add the 8 Ohms. Theoretical
gain for the antennas is near 1,5 1,7 dBi.

Figure 12 A window dipole antenna with capacitive loads of up or down installation
