One of the major advantages of going for Sub-GHz wireless communication technology is long-range. Longer the range, the cheaper the deployment cost since fewer repeaters are required. SUB-GHz RF signals can travel longer distances for given output power and receiver sensitivity. One way to increase the range is to increase the transmit power of the signal. But this comes at the cost of high power consumption. There are several ICs that provide integrated power amplifier. But the key here is the efficiency of the power amplifier. In SANDS Sub-GHz module, Microchip’s AT86RF215M SUB-GHz chip requires only 62mA to output +14 dBm in the 865 MHz frequency band.
Key design consideration for a wireless Smart meter is Power consumption. Low-power consumption is a must for battery-operated systems especially in the Internet of Things where end nodes will typically operate with battery supply. SANDS Sub-GHz module consumes very low power as it uses Microchip’s AT86RF215M solution- the only 30nA in Sleep mode.
All indications are that the industry is moving towards a wireless solution based on IEEE 802.15.4g. This standard specifies the physical layer, which is typically supported by the wireless transceiver itself. SANDS SUB-Ghz module adopts 15.4g standard. Thus it is ideally suited for the reading network of smart meters using mesh topology and hopping. SANDS SUB-Ghz module is very small in size which enables it to be fitted into any system without much fuss.