Filter eliminates adjacent channel interference

A new line of active bandpass filters, known as the "Ultra-Q filter", can solve critical communications issues.

Interference issues for wireless users have reached crisis levels, resulting in critical miscommunications for everyone from utility companies to first responders.

Now a new line of active bandpass filters, known as the "Ultra-Q filter", can solve these critical communications issues.

As more and more people use wireless communications, the available spectrum becomes increasingly clogged with traffic, creating interference on adjacent channels, with the end result being the inability to send and receive critical information.

"The Ultra-Q is designed to completely eliminate all adjacent channel RF interference within specified VHF, UHF, 800MHz and 900MHz frequency bands", said Paul Bartley, CEO of Bartley Machine.

"The Ultra-Q effectively blocks all interfering frequencies without affecting the carrier frequency, resulting in a reduced number of dropped calls and an increase in signal range and quality".

The software-driven Ultra-Q can be programmed in the field using a laptop, thereby eliminating the need for an RF technician to program the filter.

The patent was formally owned by AeroComm, of Englewood Cliffs, New Jersey, which ceased operations a year ago, and Bartley purchased the technology from its successors.

"We knew of this filter and its capabilities, and recognised that the technology was just too good to let go undeveloped".

"The wireless industry is in desperate need of a filter that can do what the Ultra-Q does, and we wanted to ensure the availability of this filter to the industry".

The Ultra-Q is currently deployed in systems throughout the country, including tunnels in New York City and Boston, in several airports and in-building systems, and is used by numerous utility companies to prevent interruption of data transmission and reduce bit error rates in Scada systems.

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