Exceptional Service

Unparalleled customer support is what you can expect from our team.


Only the best

We produce our own raw material from which the dielectrics are made


Over the past 77 years

Our engineering and technical staff work closely with our customers to determine the most optimum design for their project requirements.

Why Thorndike?

  • Full Service Supplier
  • Proven RF Problem Solver
  • Industry Innovator
  • Custom Solutions to meet specific requirements
  • Worldwide Customer Service & Support
  • Commitment to Quality

Thorndike Corporation/Engineering is a leading design and precision manufacturer of microwave absorbing dielectrics supplying the military, commercial and industrial fields .

2024 marks our 78th year of continuous service.

Thorndike Corporation/Engineering  founded by James O. Thorndike Sr. opened its doors in 1946 and began manufacturing intricate and often delicate microwave dielectrics. We have continually grown to better meet the needs of our customers. We offer quick turnaround times, high-quality end products, competitive pricing, and complete follow-through on all projects.

Our Products are manufactured in full compliance with REACH Regulation Requirement (EC) 1907/2006 and certified below the maximum allowable levels specified in the RoHs Directive and are compliant with RoHS (3) EU Directive 2015/863.

We have been assessed and approved by QAS lnternational to the following management systems, standards and guidelines: ISO9001:2015 for manufacturing microwave absorbers, dielectrics, high and low power, testing, design and engineering. Certificate # US3993

Click here to view our 2024 Thorndike Corporation Catalog



Our customers range from large world-wide commercial industries, military and government institutions, scientific companies, to private and small leading-edge entrepreneurs. To request a copy of our current Thorndike Corporation catalogue click here and complete the request form.


Machine Shop

The machining capabilities at Thorndike Corporation are extensive; many of which are housed on-site in our 18,000 sq. ft. facility. At Thorndike we mold, machine, die cut and grind raw


Engineering/Electrical Testing

Thorndike Corporation/Engineering designs and tests all of our components to meet our customers requirements. Thorndike Corporation employs Engineering Specialty Services (E.S.S) which is located on the second floor of our facility  for all component design and development.

What Our Customers Say

Lieder Development, Inc.

Quality business is about relationships. Our relationship with Thorndike has been instrumental in helping provide our customers with the highest quality products at the most competitive prices. You won't find a better provider of microwave absorbing materials. We get the best prices, the best lead times and the highest quality - every time.

Kimball Chase
CEO - Lieder Development, Inc.

Alroy Microwave & Electronics Ltd.

Alroy Microwave & Electronics Limited have been doing buying Thorndike Corporation products for a number of years across all Frequency Bands.  Whether it is High or Low Power Loads, we have found them to be competitive, helpful and have products of good quality.  Their on time deliveries are very good and they are supportive.   

Mr. D. Grist
Managing Director

Apollo Microwaves Ltd.

We have been dealing with Thorndike for many years.Myself, it has been close to 30 years.During this time, with all the development we have done, Thorndike has been there through thick and thin supporting us in whatever we have asked of them.We continue to enjoy a good business relationship and based on what we know of each other this business relationship will continue.Jim has and will continue to support us in whatever comes up in the future as he has done in the past.

Mike Mathieu
Supply Chain Manager / Apollo  Microwaves Ltd.

Advanced Microwave Components

Thorndike Corporation is the type of company that is hard to find, but I am glad we have! We have done business with Jim since 1992. They provide what they promised on a short notice, tight timelines, and with amazing correspondence. They exceeded my expectations and I highly recommend them - without a doubt.

Matt Sciarrino
President of Advanced Microwave Components

Typical High and Low Power Thorndike Products

  • Filler Cavity Backs
  • Choke Rings & Bearings
  • Dampening Rings
  • Attenuator Bushings
  • Rotary Joint Bushings
  • Attenuators
  • Coax Variable Attenuators