Micro Harmonics produces high-quality millimeter wave products including millimeter wave isolators operating from 26-400 GHz, millimeter wave circulators, and millimeter wave voltage variable attenuators. These are the most technologically advanced millimeter wave products on the market today. They are optimized for extended bandwidth and the industry’s lowest insertion loss. Our WR-3.4 isolators have typical insertion loss of less than 2 dB in the band 220-330 GHz! Our patent-pending hybrid circulator achieves 10x the bandwidth of a traditional Y-junction circulator! We also manufacture cryogenic millimeter wave isolators optimized for cryogenic applications. All our ferrite components are 100% made in the USA and can be sole sourced in US government acquisitions.

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millimeter wave components

Millimeter Wave Products



Building the Future with NASA

Millimeter-wave Hybrid Circulators

Micro Harmonics has been awarded a NASA Phase I SBIR contract for the development of an all new hybrid circulator for millimeter-wave (MMW) applications. The contract runs from July 2020 through December 2020. In the MMW, the dominant circulator topology is the Y-junction. There are very few commercial Y-junction circulators available above 100 GHz and those tend to have bandwidths near 1-2 GHz. Our hybrid circulator is not a Y-junction and can in theory cover a full rectangular waveguide band (e.g. 110-170 GHz) with inherently high isolation between the Tx and Rx ports. The initial prototype will be designed to cover the band from 150 GHz to 200 GHz. A provisional patent has been filed.

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Cryogenic Isolators for MMW Frequencies

Micro Harmonics has been awarded a NASA Phase II SBIR contract for the development of cryogenic  millimeter wave isolators. The contract runs June 2019 through June 2021. Cryogenic isolators will be developed in every standard waveguide band from WR-15 (50-75 GHz) to WR-3.4 (220-330 GHz). A line of voltage variable attenuators will also be developed in the bands WR15 through WR-8. The attenuators use the physics of Faraday rotation to cover full waveguide bands.

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MMW Isolators with Ultra-Low Loss

Micro Harmonics developed a line of ultra-low insertion loss isolators under NASA research contracts that ran from 2015-2018. The isolators cover full waveguide bands from WR28 (26-40 GHz) through WR-3.4 (220-330 GHz). They have the lowest insertion loss in the industry with less than 2 dB in the WR-3.4 band. Our isolators also have the industry’s smallest form factor. They employ diamond heat spreaders for improved power handling and are resistant to stray magnetic fields. We are currently working on designs to extend this line to the WR-2.8 (260-400 GHz) and WR-2.2 (330-500 GHz) bands.

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Micro Harmonics components are used in a wide variety of commercial and government applications. NASA uses them in earth and planetary atmospheric observation systems. Our millimeter wave products are used in military applications such as compact range radar, imaging, covert communication, and chemical and bio-agent detection. Our components are also useful in a wide variety of scientific instrumentation for plasma diagnostics (ITER), chemical spectroscopy, biomaterial analysis, radio astronomy, biomedical systems, portal security scanners, high-frequency data links, and much more. Micro Harmonics is proud to provide the technology our military, scientific community, and medical providers use to save lives, protect lives, and learn more about the world and universe in which we live. Contact Micro Harmonics today to learn more about our innovative millimeter wave products.

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