About PSI


Phase Sensitive Innovations

Phase Sensitive Innovations (PSI) is a privately owned company specializing in millimeter wave (mmW) imaging technology, systems and components.


Millimeter-wave Imaging

Millimeter-wave imaging has the unique potential to penetrate through poor weather and atmospheric obscurants to create high-resolution ’see-through’ images.


Our Mission

To produce high-quality, reliable millimeter wave imaging systems and photonic components that serve to fuel the growing needs and requirements of growing markets.

Bringing clarity to view in any weather condition


In addition to millimeter wave imaging some of the other applications for our technology include; 5G Cellular Networks and Cellular backhaul at 28 GHz, 37 GHz, 39 GHz and 64 GHz as well as millimeter wave test instrumentation and autonomous or assisted vehicles as a Radar & Lidar enhancement. 


All of our integrated modules are entirely manufactured in-house and custom-built to meet our clients’ specifications

Phase Sensitive Innovations leverages years of research and development in RF Photonics to bring several discrete components to market. See our standard offerings below. For custom solutions fitting your individual needs, browse our Services or Contact us directly with queries.

Distributed mmW aperture array

Our experience in the mmW and RF Photonic fields is utilized in building out full systems to address needs across many fields.  Below are some of the various systems that we have qualified against real world scenarios across various field tests.

modulator-waferPSI has developed and honed skills across multiple disciplines and is positioned to provide services for design, packaging, integration, characterization, simulation and testing. If you have RF or Optical needs, PSI has novel solutions awaiting your problem. Below are some of the many specific services that we provide. Contact us for these or any custom service that you may require.

  • RF Integration and Packaging
  • RF Characterization
  • SiGe Design
  • mmW Phenomenology/Simulation/Testing
  • RF Photonic Component Design
  • Custom Optical Assemblies
  • High Frequency Antenna Design

Frequently Asked Questions

What are millimeter waves?
Millimeter waves (mmWs) are electromagnetic signals with frequencies between 30 GHz (10 mm wavelength) and 300 GHz (1 mm wavelength). They are longer in wavelength than infrared and TeraHertz signals and shorter than radio waves.   Most objects naturally emit weak amounts of millimeter waves much like infrared radiation, or heat.  While our eyes cannot “see” this energy, PSI has developed sensitive imaging systems capable of capturing images and videos in the Q–band (33 – 50 GHz) and W-band (75 – 110 GHz) mmW regimes.
What are the advantages of millimeter waves?
While normal visible light is reflected off of most particles and surfaces, millimeter waves are able to pass through many materials like fabric and most building materials, and obscurants such as fog, dust clouds, and smoke.  Unlike x-rays, mmWs are completely safe and non-ionizing  and can therefore be used to detect both metallic and non-metallic contraband on people.


Atmospheric attenuation in dB/km the mmW spectrum for several atmospheric condition, courtesy of mmW Concepts, LLC.

Active and passive imaging, what is the difference?
Imaging systems can be active or passive.  An active mmW imager bounces waves off of the scene and images with the reflected energy while a passive system uses the energy naturally emitted by the scene.  Emissive objects will emit black-body mmWs in proportion to their temperature. Passive imaging systems can discretely capture  images in all weather conditions using the naturally emitted black body mmW radiation given off, or reflected, by objects.


Naturally emitted black body radiation and radiation through 1 km of fog for an emissive object at 77K, 300K, and 6000K

What is a distributed aperture imaging system?
PSI uses a distributed aperture imaging (DAI) approach over a standard focal plane array (FPA). An FPA requires a lens, larger volume, and an expensive mmW detector for each pixel. A DAI system captures the mmW signal field amplitude and phase at discrete points.  Since no lens is needed the imager can be flat or conformal and achieve higher resolution without the volumetric scaling of size and weight. In addition, a lower number of expensive millimeter wave components is needed.

Equivalent resolution imaging systems from a standard FPA and a Distributed Aperture Array

One of the most recent images of the antenna array in our lab

Want to learn more?

For product specifications, pricing information, and how to purchase, please contact us today.