What Micro Harmonics does

Micro Harmonics Corporation, founded in 2008 and headquartered in Fincastle, Virginia, designs and manufactures ferrite-based millimeter wave (MMW) components — isolators, circulators, voltage variable attenuators, and orthomode transducers (OMTs) — operating from 25 GHz to 400 GHz across standard waveguide bands WR-28 through WR-2.8. Its core technological differentiator is a patented hybrid circulator topology (Faraday rotator combined with an OMT) that delivers roughly 10x the bandwidth of conventional Y-junction circulators, plus proprietary diamond heat spreader technology that enables industry-leading low insertion loss (less than 2 dB in the WR-3.4 band versus 6+ dB for competitors). The company also produces a dedicated cryogenic isolator line verified down to 1 K, voltage variable attenuators based on Faraday rotation, and OMTs optimized for compactness and polarization performance. All products are 100% made in the USA and shipped with full-band vector network analyzer test data per unit.

The business operates on a direct hardware-sales model with quote-based, non-public pricing. Revenue is generated through direct sales (website, email, phone) supplemented by an international distributor network covering China, Europe, India, Japan, South Korea, and Southeast Asia. Customers are concentrated in four verticals: Aerospace and Government (primary, anchored by NASA SBIR-funded development for earth/planetary atmospheric observation and satellite communications), Defense and Military (compact range radar, imaging, covert communications, bio-agent detection), Scientific Instrumentation (radio astronomy, plasma diagnostics, biomedical systems, with cryogenic applications at ITER and the University of Chicago), and emerging Commercial Telecom / 5G–6G. Key named buyers include NASA, Virginia Diodes, the U.S. Military, and research institutions such as the Smithsonian Astrophysical Observatory.

Micro Harmonics is a privately held, founder-led company (David Porterfield, Founder and CEO) with 1–10 employees. Growth capital has been sourced primarily from non-dilutive channels: a $75,000 grant from the Virginia Unmanned Systems Center at CIT (October 2020), a Commonwealth Commercialization Fund award from VIPC (September 2021), and multi-year NASA Phase I and II SBIR contracts. The company has earned the Roanoke-Blacksburg Technology Council's Rising Star of the Year award (2021), appeared on the Inc. 5000 Regionals Mid-Atlantic list, and made its first appearance on the Inc. 5000 national list at rank #3,736 in 2023.

Name

Micro Harmonics

Legal name

Micro Harmonics Corporation

Website

https://microharmonics.com

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

1–10 employees

Short description

Micro Harmonics Corporation designs and manufactures ferrite-based millimeter wave components — isolators, circulators, attenuators, and orthomode transducers — operating from 25 to 400 GHz. It serves aerospace, defense, scientific research, and emerging 5G/6G customers via direct sales and international distributors.

Ownership category

akta.pro rank

Product category

Millimeter Wave RF Components

NAICS

Other Communications Equipment Manufacturing (33429), Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing (334220)

SIC

Radio & Tv Broadcasting & Communications Equipment (3663), Electronic Components, Nec (3679)

akta.pro primary industry

Passive Filters & RF Passives (LC Filters/Diplexers/Baluns/Attenuators) (HDAHANAG)

akta.pro secondary industries

EMI/RFI Suppression Components (Ferrite Beads/Cores/Filters) (HDAHANAE), Passive Components (Resistors, Capacitors, Inductors, Ferrites) (IMAGAJAA)

Keywords

• Millimeter wave components
• Ferrite isolators
• Waveguide circulators
• Terahertz RF components
• Orthomode transducers

Headquarters

HQ city

Fincastle

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales

Revenue model

1. Millimeter Wave Component Sales: Sale of specialized ferrite-based millimeter wave hardware components including isolators, circulators, voltage variable attenuators, orthomode transducers, and cryogenic variants. Components are sold as individual units with full test data. Revenue is generated through direct sales and international distribution channels.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Micro Harmonics designs and manufactures ferrite-based millimeter wave and terahertz RF components, including isolators (25–400 GHz), hybrid circulators (50–333 GHz), voltage variable attenuators, orthomode transducers, and cryogenic isolators (26–220 GHz). Components are engineered for the industry's lowest insertion loss, full waveguide band coverage, and are supplied with individual RF test data for every unit. Products are 100% made in the USA and qualified for sole-source U.S. government acquisitions.

Product overview

Micro Harmonics is a specialized manufacturer of advanced millimeter wave (MMW) components, offering a portfolio of ferrite-based RF products including isolators (25-400 GHz), circulators (including patented hybrid circulators, 50-333 GHz), voltage variable attenuators, and orthomode transducers (OMTs). The company also produces cryogenic isolators optimized for low-temperature operation. All products are 100% made in the USA and feature full waveguide band test data, with a focus on lowest insertion loss and high power handling. The product line is organized into core products (isolators, circulators, attenuators, OMTs, cryogenic variants) and discounted secondary offerings.

Differentiator

Problem solved

Functional benefit

Products and services

• Millimeter Wave Isolators Ferrite-based isolators operating from 25-400 GHz with the lowest insertion loss in the industry (less than 2 dB in WR-3.4 band, 220-330 GHz), featuring diamond heat spreaders for increased power handling and reliability. Cover full waveguide bands from WR-28 (26-40 GHz) through WR-2.8 (260-400 GHz).
• Millimeter Wave Circulators Advanced circulators for directing signal flow in transmit/receive systems, available from 50-333 GHz. Includes patented hybrid circulators using a Faraday rotator and orthomode transducer (OMT) topology achieving 10x the bandwidth of traditional Y-junction circulators, with high isolation (40+ dB) over broad bandwidths.
• Millimeter Wave Voltage Variable Attenuators Variable attenuators using the physics of Faraday rotation to cover full waveguide bands with relatively high power handling compared to other technologies. Developed in WR-15 through WR-10 bands with plans for WR-8 and WR-6.5.
• Millimeter Wave Orthomode Transducers (OMTs) Orthomode transducers with the best insertion loss, cross-polarization, and isolation on the market in a compact form factor, used to separate or combine two orthogonal polarization signals.
• Cryogenic Isolators Isolators designed specifically for optimal performance at cryogenic temperatures with ferrite biased in magnetic saturation for minimal insertion loss. Ferrite rod length is optimized for cryogenic operation. Built to withstand repeated cryogenic cycling, tested at 25 K and independently verified down to 1 K. Eight models available covering 26-220 GHz (WR-28 through WR-5.1).
• Hybrid Circulators (WR-12, WR-10, WR-8) Patented wideband circulators comprising a Faraday rotator and orthomode transducer (OMT), providing broadband coverage from 50-300 GHz with up to 24% fractional bandwidth and high S31 isolation options up to 40 dB.
• Discounted Products Refurbished or discounted millimeter wave components available at reduced prices.

Quantifiable outcome

• Less than 2 dB insertion loss in WR-3.4 band (220-330 GHz), compared to 6+ dB for competitor products
• +3 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Four partnerships are on record, tiered core, major and minor.

• NASAcoreStrategic or Co-development PartnerNASA funded Micro Harmonics through Phase I and II SBIR contracts to develop hybrid circulators and cryogenic isolators. NASA uses Micro Harmonics products in earth and planetary atmospheric observation systems. The company partnered with NASA to develop a full line of hybrid circulators operating in every standard waveguide band from 50-250 GHz. Cryogenic isolator development ran from 2019-2021 under NASA research contracts.
• Virginia Diodes, Inc. (VDI)majorTechnology or IntegrationVDI uses Micro Harmonics isolators in their extender analyzers to enable operation at higher millimeter wave frequencies. VDI CTO Jeffrey Hesler stated that Micro Harmonics' isolators from 50-400 GHz enable VDI's extender analyzers to operate at those higher frequencies. Products are referenced in joint marketing materials.
• Virginia Economic Development Partnership (VEDP)minorStrategic or Co-development PartnerVEDP was integral to helping Micro Harmonics develop their marketing strategy during COVID. VEDP released their 2021 annual report quoting Micro Harmonics on their partnership experience.
• International Distributor NetworkcoreChannel Partner/ Reseller/ DistributorNetwork of international distributors including NZJ-Tech (China), RF House/RFCom (Europe - UK/France), Spectra Innovations/Specinnovations (India), Vega Technology/Amtechs/Takitek (Japan), Changwoo Inc. (South Korea), and Pretech (Singapore/Malaysia/Thailand). These distributors represent and resell Micro Harmonics products in their respective geographic territories.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Ducommun Incorporated: Aerospace and defense electronics supplier offering RF/microwave components and integrated assemblies. Larger incumbent serving similar defense and aerospace customers with broader portfolios that include mmWave capability.
• Pasternack (Infinite Electronics brand): Broad-line catalog distributor and manufacturer of RF, microwave, and mmWave passive components including isolators and attenuators. Competes on breadth and lead time rather than deep mmWave specialization.
• Cobham Advanced Electronic Solutions: Large defense and aerospace supplier with a broad RF, microwave, and electronic warfare portfolio. Overlaps with Micro Harmonics in high-frequency ferrite and passive components for mission-critical systems.
• Mercury Systems: Defense electronics platform with RF, microwave, and mmWave component and subsystem offerings. Much larger incumbent serving many of the same defense primes and government end-customers as Micro Harmonics.

Direct peers

• Virginia Diodes Inc. (VDI): Manufactures mmWave and sub-mmWave components, sources, and test-and-measurement systems operating into the THz range. VDI is both a customer of Micro Harmonics isolators and a direct peer in the high-frequency component space, with overlapping frequency coverage above 100 GHz.
• MECA Electronics: Manufactures RF and microwave passive components, including isolators, circulators, and attenuators, serving commercial and military communications. Comparable ferrite-based passive component portfolio aimed at overlapping customer segments.
• QuinStar Technology: Designs and manufactures mmWave components and subsystems including isolators, circulators, and attenuators. QuinStar operates across many of the same waveguide bands as Micro Harmonics and serves similar defense, aerospace, and scientific markets.
• SAGE Millimeter: Supplies mmWave and sub-mmWave components including isolators, circulators, and attenuators from DC to 330 GHz. Direct product overlap with Micro Harmonics in waveguide-band passive components for test, radar, and imaging applications.
• Renaissance Electronics: Designs and manufactures RF and microwave ferrite-based components, including isolators and circulators. Comparable technology base and customer overlap in defense and commercial communications.
• Mi-Wave / Millimeter Wave Products: Long-established manufacturer of mmWave components and instruments including isolators, circulators, and waveguide products. Comparable niche specialist with similar product categories and target markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/MicroHarmonics
• YouTubeyoutube.com/channel/UCKmsLMYB7qvKqXFJnEC9Gcg
• Facebookfacebook.com/MicroHarmonics
• LinkedInlinkedin.com/company/micro-harmonics-corporation/?viewAsMember=true
• Instagraminstagram.com/microharmonics

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Micro Harmonics