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High-Power Harmonic Suppression & Signal Purity

As Canada's authorized distributor for COM-TECH, MDL Communications provides a comprehensive range of high-performance Low-Pass Filters (LPF) designed to ensure the spectral purity of your broadcast transmission.

Essential for every transmitter system, these filters allow the fundamental frequency to pass with minimal loss while aggressively attenuating higher-frequency harmonics (2nd, 3rd, and beyond). Whether for FM Radio, VHF/UHF TV, or industrial applications, our solutions ensure you remain fully compliant with regulatory spectral masks.

 

Key Performance Features

COM-TECH Low-Pass Filters are engineered in Italy to strict ISO quality standards, ensuring longevity and stability even under high-power continuous operation.

  • Superior Harmonic Rejection: Deep attenuation of spurious emissions and harmonics to meet strict FCC, CRTC, and ITU standards.
  • Ultra-Low Insertion Loss: Designed to maximize the efficiency of your system, ensuring your power goes to the antenna, not into heat.
  • High Power Handling: Robust mechanical designs available in various rigid line sizes (7/8", 1-5/8", 3-1/8", 4-1/2", up to 6-1/8") to handle power levels from 1 kW up to 60 kW+.
  • Compact & Modular: Optimized form factors that fit easily into existing transmitter racks or ceiling mounts.

Product Categories

We offer tailored filtering solutions based on your frequency band and power requirements.

FM Low-Pass Filters (87.5 – 108 MHz)

 

Designed for FM Radio broadcasters, these filters provide a sharp cut-off immediately after the 108 MHz band edge. They are critical for preventing interference with aeronautical bands and ensuring a clean signal.

  • Available in Reflective or Absorptive configurations.
  • Cross-coupling technology options for steeper rejection slopes.
  • Temperature stable design for consistent performance.

VHF & UHF TV Low-Pass Filters

High-precision filters for Digital TV (DVB-T/T2, ATSC 1.0/3.0, ISDB-T). These filters handle the high peak-to-average power ratios (PAPR) typical of digital modulation schemes without degradation.

Industrial & Scientific Low-Pass Filters

Custom-tuned solutions for ISM applications, particle accelerators, and medical RF systems where signal integrity and harmonic suppression are vital for safety and equipment longevity.

Technical Specifications & Design

COM-TECH filters utilize high-grade copper and aluminum alloys with silver plating to minimize surface resistance. The designs are fully RoHS compliant and typically feature:

  • VSWR: Excellent return loss performance across the passband.
  • Cooling: Convection air cooling for most models; liquid cooling options available for ultra-high-power industrial units.
  • Connectors: Standard EIA flanges or DIN 7/16 input/outputs depending on power rating.

Secure Your Signal Purity

Don't risk regulatory fines or interference complaints. Ensure your transmission line is clean with COM-TECH’s world-class filtering technology.

Contact MDL Communications today to determine the correct filter size and tuning for your specific transmitter.

Request a Quote or Datasheet