Mitsubishi Electric's New "REESA" Small, Low-cost Array Antenna Achieves High-precision Beam Scanning
February 05 2018 - 9:10PM
Business Wire
Mitsubishi Electric Corporation (TOKYO:6503) announced today its
development of the REESA (Rotational Element Electronically Scanned
Array) antenna, a small, low-cost array antenna that achieves
high-precision beam scanning by electronically rotating antenna
elements individually. The REESA antenna is suitable for airport
radar systems, mobile satellite communication systems and possible
new applications such as microwave-based industrial heating and
mounting on drones for long-distance data transmission.
Commercialization of the product is targeted at 2020.
Key Features
1) Rotates antenna elements individually for precise
phasing and beam scanning
- Controls phase by rotating circularly
polarized antenna elements individually by motors
- Realizes high-precision beam scanning
by controlling phase in approx. two-degree increments
- Smaller and less expensive than
conventional mechanically driven parabola antennas and active
electronically scanned arrays (AESAs)
2) Achieves high efficiency and low power
consumption
- Uses a hollow waveguide for the antenna
feed to achieve high efficiency of 85 percent in 12 GHz band
Development
BackgroundAirport radars and mobile satellite
communication systems conventionally use mechanically driven
parabola antennas or AESAs, which electronically scan antenna beams
with RF modules. The size and weight of the drive mechanism can be
a problem in the case of parabolic antennas, while AESAs require
expensive RF modules for each antenna element and achieve only
limited accuracy in phasing required for high-precision beam
scanning.
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