Micro Harmonics specializes in ferrite components for use at millimeter-wave (MMW) frequencies from 25-400 GHz. Our products offer unique capabilities that distinguish them from competing technologies. They find use in a wide range of MMW systems including test & measurement, portal security, telecommunications, scanners, and radar. We are located in Fincastle, Virginia.

DUNS: 034119968
Cage Code: 6T4C6
NAICS: 334220, 334419, 541330, 541715
PSC: H259, AJ12, 5985, 5999, C219, AR12, C222, C215

For details regarding Micro Harmonic’s core competencies, differentiators, and more check out or full Capability Statement.

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Micro Harmonics produces millimeter wave isolators and millimeter wave circulators operating from 25 GHz to over 400 GHz. These are not copies of 1960’s designs with high insertion loss and large footprints. Our components are designed from the ground up using modern sophisticated electromagnetic simulation tools to achieve the industry’s widest bandwidth and lowest insertion loss in a more compact size. Our isolators employ a unique diamond heatsink to improve power handling and achieve lower operating temperatures for improved reliability. They are simply the most advanced components on the market today.


Founded in 2008 as a specialized research and design consultancy for microwave, millimeter wave, and sub-millimeter-wave components, we remain dedicated to quality components and custom solutions. In 2015 we were awarded a NASA Phase I SBIR contract and a subsequent Phase II SBIR contract to develop an advanced line of Faraday rotation isolators and circulators in bands from WR-15 through WR-3.4 (50 GHz to 330 GHz). Because of language in the congressional SBIR authorization, our isolators and circulators can be sole sourced in US government acquisitions. Our products are 100% made in the USA.

Using sophisticated impedance matching and mode control techniques we have demonstrated a WR-15 circulator with more than 6 GHz bandwidth from 58-64 GHz, which is three times the bandwidth of any other commercial product. In WR-12 we developed and demonstrated circulators covering the bands 71-76 GHz and 81-86 GHz. In WR-10 our circulator covers a 5 GHz bandwidth from 90-95 GHz and in WR-8 we have demonstrated 5 GHz bandwidth from 115-120 GHz. Our circulators do not employ complicated dielectric impedance matching elements. They simply comprise a waveguide housing, a machined ferrite core and a pair of rare earth bias magnets. All impedance matching circuitry is machined into the waveguide structure to ensure maximum symmetry and repeatability. We continue to develop circulators in sub-bands from 50-200 GHz.

To our knowledge we are the only supplier of isolators at WR-3.4 in the world. Our plan is to extend the isolator line to WR-2.8 (265-400 GHz) and possibly to WR-2.2 (330-500 GHz). All of our isolators exhibit state-of-the-art performance in terms of low insertion loss, low VSWR and high isolation. They cover full waveguide bands and work very well over extended bands above and below the standard waveguide bands. Each isolator is fully characterized on a vector network analyzer, not spot-checked at a couple of frequencies in the band. They are quickly gaining traction in domestic and international markets as more and more companies engineer these products into their millimeter wave systems. Our prices are competitive and our performance is second to none. Contact Micro Harmonics today to learn more about our products.





Develop solutions that advance mm-wave technology.


To produce superior mm-wave components, achieve profitable growth, and care for our customers and employees in a way that honors God. We seek to build upon our position as a recognized supplier of superior mm-wave components by partnering with our customers, continually improving our products, and striving to provide solutions to unmet needs in our industry. Our focus is on:

• Superior RF Performance
• Customer Satisfaction
• Exceptional Quality
• Building Customer Trust


We strive to honor God in all that we do. As such, our company is firmly grounded in the Christian values of honesty, integrity, respect, kindness, diligence, and humility. This is the standard we hold ourselves to in our interactions with customers and the way that we care for our employees.

Job 31:6, Proverbs 11:1, 12:22, 13:4, Zechariah 7:9, Luke 6:31, 14:11, 16:10, Ephesians 4:25, James 4:10, Galatians 5: 22-23, Philippians 2:3-4, John 3:16-17.


  • Operating the company with honesty and integrity.
  • Being courteous and respectful to our customers and employees.
  • Providing exceptional products and service to our customers.
  • Engaging customers in an honest, open, and transparent manner.
  • Respecting customers, vendors, and employees without regard to race, ethnicity, or religious affiliation.
  • Providing a work environment that nurtures professional growth, builds character, and honors innovation and achievement.
  • Sharing God’s blessing with our employees and investors.


Micro Harmonics is an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex, age, or any other legally protected characteristics. We treat all people as those who bear the image of God.