TLB-TMB-THB Series VHF Batwing Antennas

RF Technologies builds the time tested VHF batwing antenna in both standard and low downward radiation (low RFR) versions. There are
three standard models: TLB for channel 2-3, TMB for channel 4-6, and THB for channel 7-13. The THB antenna is available in side or top
mounted configurations – the TLB, and TMB models are only available in top mounted models. In addition to the standard models, the
antennas can be scaled for a specific frequency of operation.

RFT Improves Batwing Antenna Technology
For the past 50 years batwing antennas have not changed much from when they were first developed. A little known secret is that batwing
antennas are really 75 Ohm antennas needing bulky 75 Ohm line components to feed them. RFT has advanced batwing antenna technology
by redesigning the feed system using modern 50 Ohm components and introducing a proprietary elemental transformation system at each
element. The result is an antenna that has excellent V.S.W.R and bandwidth, plus much better power handling ability than older generations
of Batwings. The 2 through 6 bay models have a 25 kW input rating, the 8 through 12 bay models have a 40 kW input rating.

Scaled Batwing Antennas Mean Lower Tower Loads
Depending on your channel of operation, a scaled to channel batwing solution from RFT can reduce the weight and windload area of a
Batwing antenna by up to 10%. If your station is on channel 6, why do you need a larger antenna that is built for channel 4? By specifying the
antenna to operate optimally at channel 6 you get a smaller lighter weight antenna, plus a better elevation pattern.

RFR A Big Problem At Your Site?
Batwing antennas can also be low RFR (or downward radiation) antennas by applying some innovative design ideas. RFT has delivered the
world’s first set of low RFR batwing antennas. By optimally scaling, and spacing the batwing elements, a 9 to 15 dB reduction in radiation at
high axial depression angles can be achieved. Besides the lower RFR footprint of these antennas, the vertical height of the antenna is
reduced by up to 15%, with little or no change in elevation gain as compared to a standard batwing antenna design.

Options for the VHF Batwing Antennas
RFT’s batwing antennas can be supplied with element heaters for high ice areas, or radomes to cover the feed area of each element. The
antennas can be supplied with a quadrature hybrid for single feed line applications. The top mounted versions of the antennas are available
in bury or flange mounts. Stacked multi-channel versions of the antennas are available.

VHF Batwing Antenna Data Profile Click here for PDF