Wantok Enterprises Ltd.

Telecommunications/Broadcast Consulting


P.O. Box 89 Grunthal, MB Canada R0A 0R0

Tel: (204) 434-6423 Fax: (204) 434-6442

Email: wantok@mb.sympatico.ca




This type of antenna forms part of the Wantok SBS-1 Suitcase Broadcast Station

Continuous reliable power.....




The double stacked dipole has the benefit of 3.7dBi of gain and broadband operation. This is achieved using a specially designed splitter box to feed each dipole antenna with the correct RF signal phase. Providing the antenna is mounted correctly the SWR is less than 1.8 across the whole band from 87.5 to 108 MHz. This antenna system never needs tuning, just put your transmitter on any frequency from 87.5 to 108 MHz and switch on.

Normally the dipole system clamps as high off the ground as possible to a mounting pole of at least 4 meters in length and 50mm in dia which you need to provide and engineer yourself.

The RF field strength directly below this antenna is lower than that of a single dipole. The built in balun provides a truly unbalanced input and prevents any RF currents traveling down the outer of the feeder cable. This combined with the low field strength below the antenna reduces the chances of audio and TV interference considerably and maximises RF power to the horizon.

Coaxial line losses can be considerable at 87.5 - 108 MHz. For long runs use a good quality cable such as RG213 or equivalent for connecting the antenna system to the transmitter.

3.7dBi Gain at Band Centre, 2.3 times Effective Power Increase

SWR less than 1.8 from 87.5 to 108 MHz

20 MHz Bandwidth

Aluminum and ABS Construction

50 ohm unbalanced input (SO-239 socket)







Visit our web page at www.wantokent.com