Company Overview

Who We Are
K&L Microwave, part of the Microwave Products Group (MPG), is a subsidiary of Dover Corporation, a diversified global manufacturer with annual revenue of approximately $7 billion. K&L 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. K&L is AS9100 certified and offers customers the most extensive range of filter-based products in the industry, spanning from 0.3 MHz to 65 GHz.

K&L began operation 50 years ago in a 1,400 square foot facility manufacturing custom filters primarily for the military sector. Today, with manufacturing facilities in the United States and the Dominican Republic and a global sales presence, K&L is the industry's premier filter supplier for both military and commercial markets. Over 300 employees represent the engineering, sales and marketing, manufacturing, and support personnel that enable K&L to support such a broad product and customer base.

What We Do
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.

Our Goal
K&L's mission is to produce high-quality, cost-effective solutions based on our customers' specific needs. By controlling internal design and production processes, K&L ensures and guarantees high quality and exceptional product performance. The K&L team is committed to achieving excellence through aggressive investment in research and development, through capital investments in manufacturing technology and through the use of proven and innovative designs.

Technical Expertise
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.

Manufacturing Savvy
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 100 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.

Quality Emphasis
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.

Sales Innovation

K&L developed the Filter Wizard® web application as an on-line resource to help customers and potential customers select parts to meet specifications, review typical response data, and submit requests for quotes. As the application's capabilities continue to expand, emphasis remains on ease-of-use. Filter Wizard can be accessed directly at or from the company’s web site at Filter Wizard provides an easy way for customers to explore options on their own or in cooperation with factory representatives. A team of knowledgeable sales engineers and a network of regional and international sales representatives stand ready to assist customers with standard catalog products and specialized requirements.