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Beverage Antenna. Theoretical Look on Practical Result.

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ANTENTOP- 01- 2016 # 020

Beverage Antenna. Theoretical Look on Practical Result.

 

 

The Table 1 shows that at all amateur HF Bands my Beverage Antenna has the gain much below zero. However it is possible compensate at receiving mode by turn on the internal transceiverís preamplifier. At transmitting mode only propagation may help me. However I often received reports 559- 579 at 160- 20 Meter Bands where the antenna losses are big enough. At the 17- 10 Meter Bands the report 599 is common one there. It is very interesting that practically measured SWR is close to the theoretical one above the 160- Meter Band where the some known inaccuracy in simulation is happened. Figure 2 shows SWR of the Beverage Antenna measured with the Rig Expert AA1000. It is very close to the reading by the IC- 718 and to the theoretical calculated by the NEC for MMANA.

Another important side of the Beverage Antenna is the Diagram Directivity. Below Figure 3 to Figure 11 show DD of the Beverage Antenna at the 160, 80, 40, 30, 20, 17, 15, 12 and 10- meter Bands in the vertical plane. Feedline with matching transformer is on the left side and the termination resistor is on the right side of the figures. As you can see from the Figure 3 - Figure 11 the DD of the Beverage Antenna is far away from a perfect one. Antenna has signification radiation into zenith. It is may be not bad for 160- 40 Meter Bands where it gives local QSOs. However at the higher bands it is just waist of the transmitter power.

 

 

 

 

Figure 2

SWR of the Beverage Antenna shown by the Rig Expert AA1000

 

 

Figure 3

DD of my Beverage Antenna at 160- Meter Band

 

Figure 4

DD of my Beverage Antenna at 80- Meter Band

Figure 5

DD of my Beverage Antenna at 40- Meter Band

Figure 6

DD of my Beverage Antenna at 30- Meter Band

 

 

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July 3, 2016 16:36

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