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Mitsubishi Electric Develops World's Smallest Antenna Prototype for High-precision Satellite-based Positioning in Four Frequency BandsWill accelerate highly accurate positioning for autonomous driving and much more


TOKYO, January 17, 2022 - Mitsubishi Electric Corporation (TOKYO: 6503) announced today that it has developed a prototype of the world's smallest* antenna for high-precision satellite-based positioning in four frequency bands used by the world's main satellite-positioning systems and positioning-augmentation services.** The highly compact antenna, which is expected to be installed in diverse vehicles and even drones, will accelerate high-precision satellite-based positioning for autonomous driving and many other applications.

  1. *As of January 17, 2022, among antennas for high-precision satellite-positioning in four frequency bands (according to Mitsubishi Electric)
  2. **Services that provide information for correcting positioning errors and confirming positioning reliability
  • Prototype of compact antenna for satellite-positioning devices

  • Examples of satellite-positioning applications


  1. 1)Proprietary technology achieves world's smallest 4-band antenna for diverse vehicles
    • The antenna's two folded linear elements are wired three dimensionally and symmetrically on each of four molded-resin layers, which are perpendicular to the module's horizontal surface. This unique design has resulted in the world's smallest four-band antenna for the high-precision satellite-based positioning of diverse autonomous vehicles, including drones and small tractors as well as automobiles.
    • The prototype's L1 bandwidth, which is about triple that of the company's existing model, is achieved with three-dimensional wiring*** and an antenna configuration optimized for space limitations. Also, the new antenna supports major positioning-satellite systems and positioning-augmentation worldwide.
    1. ***Achieved with a molded interconnect device (MID) in which electrodes, circuits, etc. are formed on the surfaces of three-dimensional molded-resin layers
  2. 2)Unique structure achieves multipath wave suppression for more precise positioning
    • Positioning precision is enhanced with the antenna's unique structure, which combines both straight and loop elements to reduce back lobe radiation, thereby suppressing multipath waves reflected from the ground.
    • Compactness and multipath wave suppression are achieved without increasing the antenna's size, unlike conventional multipath-wave suppression methods.

Future Development

Going forward, Mitsubishi Electric will research practical applications by evaluating the prototype's positioning precision in outdoor trials.

Antenna Specifications

New antenna Company A's Company B's Company C's
(including case)
Horizontal surface 59 mm x 59 mm 140 mm x 140 mm 160 mm diameter 76 mm diameter
Height 33 mm 62 mm 60 mm 35 mm


Note that the press releases are accurate at the time of publication but may be subject to change without notice.


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