STMicroelectronics AN4133 SPIRIT1 Transceiver ARIB STD-T108 920 MHz Application Note

About this manual

This document outlines the expected performance of the SPIRIT1 transceiver when operating under the ARIB STD-T108 standard in the 920 MHz band. It covers the requirements for convenience and low-power radio stations defined by the Japanese Association of Radio Industries and Businesses (ARIB).

The note provides specific details on permissible values for unwanted emission intensity and limits on secondary radiated emissions for both transmitters and receivers. It also describes the application circuit and channel masks for various frequency ranges within the 915 to 930 MHz bandwidth.

What's inside

• An overview of ARIB STD-T108 regulation
• Convenience radio stations
• Low-power radio stations
• Application circuit
• Transmitter
• Receiver
• References
• Revision history

Specifications

Frequently asked questions

What is the maximum permitted antenna power for convenience radio stations?

The maximum permitted antenna power is 250 mW (+24 dBm on a 50 ohm load).

What output power is permitted for low-power radio stations in the 920.5 MHz to 928.1 MHz band?

An output power of 20 mW is permitted in that band.

What is the permissible spurious emission strength for frequencies between 920.3 MHz and 924.3 MHz?

The permissible spurious emission strength is -55 dBm.