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. Applications include satellite communications, radar, radio communications, fire control radars, telemetry applications, missile guidance systems, mobile radio base stations, and air traffic control and communications. Commercial products include high-performance receive and transmit filters, delay line filters, duplexers and diplexers, combiners, receive multi-couplers, wireless system assemblies for base station requirements, and lower-cost ceramic and lumped element parts.

K&L maintains a large staff of design and applications engineers with access to an extensive design library and a variety of software tools for approximation, synthesis, realization, analysis, and simulation. An Applied R&D group focuses on developing advanced passive and active solutions for customer requirements, achieving breakthroughs in performance, size, cost, PIM behavior, etc. Specialized testing equipment, including high-power and high-frequency devices, assists with verification. Collaboration within MPG magnifies company design capabilities.

K&L has been a pioneer in vertical integration in the filter industry and continues to set the standard. Numerous CNC machining stations are networked with CAD/CAM computing stations, allowing efficient transfer of data from one process area to the next. A new state-of-the-art plating facility, temperature chambers, vibration and leak testing equipment, laser-welding and laser-labeling devices, and 150 network analyzers support efficient flow of product throughout the company to meet delivery deadlines. In addition to significant investment in production and testing equipment, K&L streamlines production by teaming with customers to implement lean manufacturing and maintains a Dominican Republic manufacturing facility for high-volume, commercial throughput.

Workmanship is a priority at K&L, and has been over the company's 45-year history. J-STD training and certification helps ensure quality in hands-on detail, and conformance to AS9100 policies and use of company-wide preventive and corrective action software contribute to overall continuous improvement. Customized automated testing software, rooted in 25 years of automated testing experience, is deployed throughout the company.