K&L Microwave

Microwave Filters Optimized for Industry Performance

Overview

Quality and Innovation with Custom Results

Since 1971, we’ve aggressively invested in innovation to deliver interference mitigation products built to even the most exacting specifications. By taking control of the internal design and production processes, K&L Microwave can work collaboratively with customers, employing our high-quality standards and industry expertise to develop custom solutions across a full line of applications.

Our line of filters, duplexer, and subassemblies includes multiple topologies, including Ceramic, Lumped Element, Cavity, Waveguide, and Tunable Filters.

Brand Profile

K&L Microwave is recognized by top-tier defense contractors and wireless infrastructure providers as a world leader in the design and manufacture of RF and microwave filters, duplexers, and integrated assemblies.

Quick Facts

K&L designs and manufactures a full line of RF and microwave filters, duplexers, and subassemblies, including ceramic, lumped element, cavity, waveguide, and tunable filters. K&L supplies many of today's most significant military and homeland security defense electronics programs.  

50+ years of Experience on Call

182,000 Square Feet of Manufacturing Space

Pioneer in Vertical Integration

BSI QMS ISO9001:2015 Certified

J-STD Certified

Domestic and International Programs

Commercial and Military Applications

Facility, Qualities, & Capabilities

K&L Microwave | Salisbury, Maryland & Dominican Republic

As one of the first RF and microwave filter manufacturers to incorporate a vertical integration strategy into our design and manufacturing processes, K&L Microwave continues to push standards of innovation in interference mitigation devices. We pair our quality engineering practices with the highest levels of product manufacture and testing to ensure unmatched reliability.

Facility and Test Equipment

  • World Class humidity and temperature-controlled environment
  • State of the Art plating facility
  • In-house CNC machining center with CAD/SAM computing stations
  • Thermal and Humidity Chambers
  • Vibration and leak testing Equipment
  • Dominican Republic facility's quality system is registered to ISO 9001:2015 by QMI - SAI Global.

Design Software

  • CSD Software for synthesis, realization and analysis for improved first pass yield
  • Design Library
  • Filter Wizard® a web application helped customer select part
  • Cosmos FEA (validation and failure mode simulation)

Quality Certifications

  • AS9100 and ISO-9001 Certified through BSI Management Systems
  • MIL-STD 45662, ANSI Z-540 and ISO 10012
  • ISO4001:2004
  • J-STD training and certification
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Products

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Band Pass

Band Pass Filters allow signals within a certain frequency range to pass, while rejecting or attenuating frequencies that fall outside that range. To meet customer specifications, timeframes, and cost requirements, K&L Microwave offers a full line of Band Pass Filters, that can be customized to meet varying frequencies, bandwidths and Q requirements.

 

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Band Reject

Band Reject Filters pass most frequencies unaltered but attenuate those in a specific range to very low levels. Typically, the width of the band reject is 1 to 2 decades. However, in the audio band, a notch filter has high and low frequencies that may be only semitones apart. All Band Reject Filters or Band Stop Filters made by K&L Microwave are available as a wideband or narrowband components and can be customized to user specifications.

 

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Low Pass

A filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter design. The filter is sometimes called a high-cut filter, or treble-cut filter in audio applications. A low-pass filter is the complement of a high-pass filter.

 

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High Pass

A High Pass electronic filter allows signals above a certain cutoff frequency to pass and attenuates signals with frequencies that fall below the cutoff. High Pass Filters can be used for multiple applications, such as blocking DC from circuitry sensitive to non-zero average voltages or radio frequency devices. MPG can customize a wide range of RF High Pass Filter topologies to meet multiple applications across industries.

 

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