ComNav Engineering's core product is microwave filters and filter subsystems. By exploiting our proprietary coating technique, we are able to achieve specs and production yields that other companies dream about. Our cross-coupling and pole/zero typologies allow us to achieve lower loss and higher rejection in a smaller size than the competition with our ceramic products.

In addition to ceramics, we are also very adept at squeezing performance and cost out of cavity and chip and wire (LC) type structures. Using highly tolerenced components, pick-and-place assembly, and statistical process control, our chip and wire filters can achieve high yields, consistent performance and low cost.

We over-engineer our cavity and dielectric resonator puck filters on the front end to decrease assembly and tuning time in production. All of our products are designed at the beginning with high volume in mind. As a result, parts are custom tooled, fixtures are built, and process controls are setup before we go into high volume.

Though ComNav manufactures microwave filters, our true product is engineering expertise. The natural give and take that occurs during the design process allows the company to form a close relationship with our customers. With engineering talent, and modern design software, ComNav Engineering is in an excellent position to provide quick response to customers needs and solve complex engineering problems.

Quality Assurance

Beginning in November 1996, ComNav began the process of obtaining ISO 9001-94 certification, which was completed in August of 1997. In fact, ComNav Engineering was the first U.S. filter company and 2nd in the world to achieve ISO certification. Certification will was conducted by Quality Management Institute (QMI) and registration is through the Registrar Accreditation Board (RAB). In 2003, ComNav upgraded its certification to the new standard 9001:2000. In developing our quality systems we have documented all of our design, manufacturing, and control systems used throughout the company. ComNav was at a distinct advantage in setting up our quality systems, having come from and ISO environment at Control Devices and starting from scratch, we were able to establish an ISO compliant system from the beginning rather than convert existing systems. This accounts for the short time involved from the beginning of the process to certification.

About Us

ComNav Engineering was established in 1991 and incorporated in the state of Maine in 1994 by Martin J. Geesaman. Initially the company operated as a sole proprietorship providing engineering consulting services to several microwave filter companies. During this period, a software program entitled Filtroid was developed to assist engineers in designing microwave filters.

ComNav Engineering, as a manufacturer, began as a product group of Control Devices, a GTE subsidiary. Martin Geesaman and Scott Burgess spent three years doing research and development of various coating techniques and ceramic filter typologies. The result was a superior coating technique that yields unparalleled unloaded Q and adhesion. This coating technique along with several proprietary filter typologies translate into the low loss high performance filter structures that are the corner stone of ComNav's product line today.

As the filter group began to expand and demand more resources, it became a distraction to the rest of Control Devices, whose primary focus is the automotive business. It was decided to spin off the filter group into a separate company. Mr. Geesaman acquired backing to purchase the assets, and folded the filter group into ComNav Engineering. ComNav Engineering began manufacturing operations in June of 1996 as an independent company.

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•Software: Dionysus Microwave Filter Design
• Capabilities Overview