1. Home


Sub-GHz Wireless Communication Solutions

Sub-gigahertz (sub-GHz) wireless communications1 technology uses waves around the 920 MHz band. With the proliferation of the Wi-SUN Alliance's international wireless communication standards, sub-GHz wireless communications are being rapidly adopted by the market. Compared to Wi-Fi and BLE (Bluetooth Low Energy), which use the 2.4 GHz band, sub-GHz wireless communications have the following features.

Better distance
Circumvention of obstructions
Little radio wave interference

Renesas offers sub-GHz wireless communication solutions with a high-performance IEEE802.15.4g-compliant system on chip, convenient starter kits, and software stacks certified by the Wi-SUN Alliance to help you easily start developing your application.

  • Notes
  • 1. FSK communication compliant with IEEE802.15.4g.
  • 2. Range of communication varies depending on mode, obstructions, presence of shielding, layout conditions, surroundings, and so on, so these distance values are not categorical. They are reference values only, and are not guaranteed.

Applications of Sub-GHz Wireless Communication Solutions

Smart grid
Building management and lighting
Infrastructure monitoring
Smart meter
Factory automation, sensing, and remote control
Smart agriculture and fishing industry
Disaster & crime prevention and security
Smart home and HEMS
Monitoring (sick, elderly, children)


Sub-GHz Wireless Communication Devices With High Performance and Ease of Design

Renesas' sub-GHz wireless communication devices are a wireless communications system on chip (SoC) and microcontrollers (MCUs) with on-chip wireless function. The RAA604S00 wireless communications SoC has built-in RF peripheral components and hardware supporting IEEE 802.15.4g/e, and realizes the lowest level of current consumption in the industry. The RL78/G1H MCU with on-chip wireless function is a single-chip solution integrating the ultra-low-power RL78 core with wireless communication function. Choose from these two devices according to the needs of your system.

High Performance
Ease of Design


Starters Kits For Easy Development and Evaluation

Evaluation boards for Renesas' sub-GHz wireless communication solutions have been certified for technical standard conformance for Japan, and are used by the Certified Test Bed Unit (CTBU) of the Wi-SUN Alliance for the Wi-SUN ECHONET Lite Profile international wireless communications standard.
Choose from among three starter kits according to the needs of your system.

RL78/G1H Low power single-chip solution TK-RLG1H+SB
RX63N + RAA604S00 High-performance solution MB-RX604S-01
RL78/G14 + RAA604S00 Low power solution RL604S Stick

Software Stacks That Facilitate System Design

Software for Renesas' sub-GHz wireless communication solutions is compliant with the Wi-SUN ECHONET Lite Profile international wireless communication standard and has been certified by Wi-SUN. The software undergoes interconnection testing by the standardization organization, the Wi-SUN Alliance, so you can carry out system design for a wireless network with peace of mind.
Choose from among three packages according to the needs of your system.

RF Driver Package
MAC Stack Package
IP Stack Package

Example of Sub-GHz Wireless Network

The IP stack package supports route B (1:1 communication) of the Wi-SUN ECHONET-Lite Profile and the IP network of single-hop HAN (1:N communication).

Evaluation Tools For Visualizing Wireless Communications

Wireless signal strength is easily affected by obstructions in an outdoor environment and other factors, so analyzing the state of communications is difficult. Renesas offers evaluation tools that can visualize wireless communication data and display an analysis of that data.

RF Test Studio
RF Sniffer

Technical Standards


With the spread of the Internet of Things (IoT), wireless networks are used to relay data back and forth between devices that are equipped with communication functions, and network system complexity and scale are expected to increase. The Wi-SUN Alliance drives the standardization and creation of profiles for communication protocols that can ensure interconnectivity in these diversifying networks. Renesas has been a strong promoter of research and development and international standardization for the Wi-SUN Alliance since its establishment, and develops solutions that support the protocols of the Wi-SUN Alliance.