KEYCOM provides solutions in the 300 GHz to 1 μHz frequency range (SHF/EHF/MW/UHF/VHF/ULF).
We undertake designing, manufacturing and measuring. Please feel free to contact us.

KEYCOM Provides Solutions in the 10 μHz-300 GHz
(infrasonic / VHF / UHF / microwave / millimeter wave / super-high) Frequency Range

Model No.

KEYCOM develops and manufactures highly accurate and reliable measurement components, devices and systems in the field of 10 μHz-300 GHz (infrasonic / VHF / UHF / microwave / millimeter wave / super-high) .

From small components / devices to large systems, we support your research and development with everything we've got.

If you have any inquiries or face problems in proceeding with your project, please feel free to contact us via e-mail: or phone.

We can also flexibly arrange Online meeting in English/Chinese (all platform acceptable) .
If you need to discuss with us in detail, please writedown in e-mail information as below;

・Online meeting request
・Preferred date and time (e.g., April 1, 2:00 pm* or later, about 1 hour)

  *The time is based on Japan Standard Time.

KEYCOM's Characteristic and Cutting-edge Products

Ultra-low,Superconductivity products

KEYCOM has more than 20 years of experience in the field of ultra-low temperature and superconductivity, providing tools and systems such as cables and fixtures to more than 200 research institutes worldwide.
In particular, Keycom has become an indispensable partner for research institutions in the field of Quantum Computing.

NbTi-NbTi Superconducting Coaxial Cables [UPJ07]

NbTi-NbTi Superconduction coxial cable for cryogenic and strong electromagnetic field, recognized by research institutions all over the world. Highly effective at thermal gradient below 4K.

Original, High-Performance, Practical Measurement System

TE-mode Open Resonator Relative permittivity/dielectric loss tangent measurement system [DPS19]

TE-mode Open Resonator Also called a Split Cylinder Resonator, the system performs measurement by inserting a sheet sample between the resonators.

The problem with conventional, so-called "Split Cylinder Resonator with slit structure" is that it does not give accurate measurement values.

To solve this problem, KEYCOM has prepared a Cavity vertical movement device (patent pending) that freely controls the resonator gap to facilitate sample insertion and measurement of AIR resonance Q-value.

LiDAR Test System --- Moving Target Type [LTS03]

LiDAR Test System Moving target type has been newly added to KEYCOM's LTS(LiDAR Test System) series.
This type enables more realistic testing by varying the relative distance (5m to 300m).
The system is very compact, so that it can be used on a desk in a room for smooth verification of LiDAR functions.

Automorive Sonar Test System [USSTS01]

Automorive Sonar ➀Development and Inspection of Ultrasonic Sonar Sensors for Automotive
・Simulates the distance to a reflective object and is useful in the development and testing of ultrasonic sonar sensors

②Vehicle Driving Simulation
・By linking with a driving simulator, it is possible to simulate surrounding conditions (e.g., A car is parking while another cuts in)

Automotive Bumper Evaluation System [BES01]

Automotive Bumper The system can measure transmission attenuation and beam tilt angle of large DUT, such as bumpers.
DUT can be moved in X-direction, Y-direction Z-direction, and rotation around Z-direction also is possible.
This allows measurement of transmission attenuation and beam tilt angle at any position.

Material Measurement Service

KEYCOM has not only developed measurement devices and systems based on its advanced technologies for products in the 10μHz~300GHz (VHF/UHF/Microwave/Millimeter wave) field, but has also refined its measurement technologies for a wide variety of materials over 25 years of providing measurement services.

In addition to our original measurement equipment, we also own a 110 GHz vector network analyzer, a 110 GHz scalar network analyzer, an 80 GHz spectrum analyzer, a 70 GHz oscilloscope, and various other measurement equipment.

This allows us to cover almost all of the material measurement needs, including solids, sheets, films, powders, liquids, and multilayer structures.

If you are facing difficulties as following cases, please don't hesitate to consult with us;

  • You only need to make a few times of measurements
  • You want accurate measurement data in a hurry
  • You have no plan to own measurement equipment at the moment
  • You are wondering if you can really measure the very material right in front of you
    (with some problems in characteristics, thinness, size, etc.)

KEYCOM's Technology recognized Worldwide

Award at ICF (April,2013)

At the 11th International Ferrite Conference (abbreviation: ICF11),
KEYCOM's product
"High Frequency Magnetic Measurement System from 100kHz to 10GHz"
have been awarded the ICF11 New Product & Novel Technology Award.

・IEC 60556 Ad2・2(2016)
・IEC/TR 63307 Ed.1.0:2020(en)

Member of Standardization Committee

Recognized achievements in
  • Permittivity measurement
  • Radio wave absorption rate measurement
KEYCOM has been selected as a standardization committee member of the IEC (International Electrotechnical Commission) / JIS for permittivity measuring devices, etc.

KEYCOM's unique technology becoming Global/Japan's Standard

  1. KEYCOM's method for measuring the dielectric characteristics in the millimeter wave band has become JIS standard (JIS R 1660-2).
  2. KEYCOM's method for measuring the amount of reflection attenuation of the radio wave absorber has become IEC standard (IEC62431) and JIS standard (JIS R 1679).

Announcement of our Holidays

Our office will be closed during the following period:

April 27th to May 6th, 2024

We will open from Tuesday, May 7th, we apologize for your inconvenience during this period.