antentopSince2 July

Ham Spirit
Antentop Free E-Magazine
Free Choice

 

 

Free Antentop Amateur Open Book
Antentop Album
Antentop Survey

 

 

 

Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

BA- Butterfly Antenna

Custom Search

 

ANTENTOP- 01- 2007, # 009

BA- Butterfly Antenna

 

 

 

By: N. Filenko, UA9XBI ua9xbi@online.ru

 

Credit Line: www.cqham.ru

 

The antenna is a version of a shunt fed loop (Reference 1). However, the antenna has some advantage compare to a version from Reference 1.

  1. Input impedance is closed to 50 Ohm.
  2. The antenna has more narrow diagram directivity.
  3. Easy to installation. It could be hanged between trees, trees and house, etc.

Figure 1 shows the antenna at a horizontal installation. Figure 2 shows the diagram directivity of the antenna at its height 5 meters over real ground. Mostly vertical polarization is at the installation. Figure 3 shows the SWR the antenna at its height 5 meters over real ground. Figure 4 shows input impedance the antenna at its height 5 meters over real ground. The plots were taken with help of MMANA (Reference 2).

 

UA9XBI

Radio club Arktika Championship 2004

Photo Credit Line: http://www.arktika.komi.com/Champ_2004.htm

 

Figure 1 Butterfly Antenna at Horizontal Installation

 

http://www.cqham.ru/

 

 

http://www.antentop.org/

Page 22

 

22 23 24 25 26

 

 

QRP Transceivers and PA from Accessible Parts IP for QRP Antentop Book Radio Antenna Engineering Book Antentop Printed and e- magazines
 


 

 

Just for Fun:

Map IP Address
Powered byIP2Location.com

Thanks for your time!

Last Updated:

August 2, 2016 23:23

Antentop Home Page

Free Antentop Open Book