Mitsubishi Electric Corporation announced 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) Proprietary technology achieves world's smallest four-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, achieved with a molded interconnect device in which electrodes, circuits, etc. are formed on the surfaces of 3D molded-resin layers, and an antenna configuration optimized for space limitations. Also, the new antenna supports major positioning-satellite systems and positioning-augmentation worldwide.
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.
Going forward, Mitsubishi Electric will research practical applications by evaluating the prototype's positioning precision in outdoor trials.