LBA Technology Engineers a Triplexer Solution for Snug Tower Site in Middle of Lake in Taiwan
- North Carolina telecommunications innovator LBA Technology overcomes challenging conditions and
delivers a second multiplexer unit to Broadcast Corporation of China.
NC – LBA Technology has designed, built and delivered to Taiwan an advanced technology
Medium Wave Triplexer system for Broadcasting Corporation of China. This is the second successful multiplexer
project undertaken by the North Carolina company for the BCC.
The project is especially notable because the
tower site posed an engineering challenge. The triplexer had to be incorporated into an electrically short tower
in the middle of a lake, with the tower base and triplexing equipment fitted snugly on a small platform area 30
feet above the water.
Half a world away from Taiwan, LBA senior engineer Marvin Brewer simulated the
electrical requirements by NEC modeling. He specified installation on the tower of an LBA Technology Q-Cage™
broadbanding kit to improve matching impedances and then designed a triplexer system in three independent ATU – RF
filter combinations. The system’s weatherproof cabinets were clustered around the base of the tower base in a way
that allows full access to them for maintenance. LBA Technology shop experts fabricated, adjusted and tested the
As its name implies, a triplexer allows the simultaneous use of three medium wave AM transmitters on a single
antenna. Triplexers combine an antenna-tuning unit and a rejection filter section for each frequency, which
effectively sort out and pass through desired frequencies and reject undesired frequencies. The triplexer system
for BCC was designed for 531kHz, 648kHz and 963kHz, and 10,000 watts power at 125 percent modulation for each
The triplexer system was delivered through Broadcast Electronics in Quincy , Ill., an
international transmitter manufacturer. LBA has partnered with the Illinois company on projects in the U.S., the
Middle East, Far East Asia, Afghanistan, Iraq and the United Kingdom.
LBA Technology routinely
custom-engineers multiplexers so broadcasters can feed multiple transmitters to common antenna systems. It is a
cost-effective way to minimize the physical plant requirements of AM broadcast stations. With almost 50 years of
experience, LBA provides a wide variety of AM broadcast antenna solutions for all power levels… worldwide.
About LBA Technology, Inc. LBA Technology is a leading
manufacturer and integrator of radio frequency systems, components and test equipment for broadcast, industrial
and government users worldwide. With
Lawrence Behr Associates, Inc., the
company is a unit of
LBA Group, Inc, which has nearly 50 years experience in
providing support for infrastructure assets of the wireless telecommunications industry. The companies are based
in Greenville, NC.