02.16.2010 02:35 PM
Originally featured on BroadcastEngineering.com
Dielectric to debut filter, two new antennas at NAB2010

Dielectric is previewing three new antennas at the 2010 NAB Show.

The DLP antenna series features horizontally polarized antennas in a number of standard directional azimuth patterns, with an average power rating of 1.6kW. Designed to provide broadcasters with a low weight- and wind-load system for mobile media transmissions, distributed transmission systems and translators, the DLP features an eight-bay, single-module design. The antenna provides a single 7/8in input, 1.5-degree beam tilt and a low-profile slot cover for protection from environmental wear and tear. Its simple mechanical design enables straightforward installation.

The TUL UHF circularly polarized antenna is a low-power panel antenna with a 500W power rating per panel engineered to fill coverage gaps in broadcasting networks. The TUL UHF CP provides reliable signal performance for mobile media broadcasting. It has a lightweight aluminum construction with an ABS radome, 65-degree beam width and broadband, 10-channel bandwidth. Customizable to meet individual broadcaster's needs, the TUL UHF CP can be configured in standard narrow and wide cardioids, peanut and omni-azimuthal patterns and with various elevation gains. The system operates with a single Type N or 7/16 DIN input and provides a low VSWR.

The 5kW tunable filter is a UHF-band mask filter designed for use with solid-state, medium-power transmitters with a digital output power of 5kW or less. Engineered to meet the critical or noncritical mask filter requirements for 6 MHz and 8 MHz bandwidths, the filter supports various digital standards, including ATSC, DVB-T, ISDB-T, and SBTVD-T. The cross-coupling technique, combined with high-Q silver plated aluminum cavities, creates steep rejection skirts and provides low passband insertion loss, all in a compact package. The band-pass filter is offered with six or eight cavities that, for most UHF medium-power transmitters, will provide the necessary rejection required in various digital standards.

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