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ANTENTOP- 01- 2005, # 007  

Window Dipole Antennas with Capacitive Loads

 

Parameters of the 10- meters Band Window Dipole Antenna with Capacitive Loads of Up and Bottom Installation

 

Theoretical parameters of the antennas (copper, wire in 1-mm (18- AWG) diameter)  (see Figure 12) were simulated with help of MMANA. Figure 16 shows input impedance of the antenna installed at window 150 cm wide.

Figure 17 shows input impedance of the antenna installed at window 210 cm wide.  Theoretical input impedance for ‘narrow’ antenna is 12- Ohms, for ‘wide’ antenna- 26- Ohms. Practically measured impedance is higher on 8- 10 Ohms the theoretical due losses at neighbor subjects. Figure 18 shows a SWR at 50- Ohm coaxial connected through matching device (see Figure 14) to ‘narrow’ antenna (see Figure 12).

 

Figure 16 Input impedance of the antenna installed at window 150-cm wide

 

 

Figure 17 Input impedance of the antenna installed at window 210-cm wide

 

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August 3, 2016 16:46

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