Multiple antenna structure using for multi-environment positioning system

This paper presents a miniature antenna optimized for an environment agnostic positioning system. Based on the principle of multiple standard positioning techniques, the proposed terminal is using the low-power LR1110 integrated circuit. With the dimension of 50 × 40×10 mm3, the antenna supports LoRa communication standards at 868 MHz, GNSS communication standards at 1575 MHz, and WiFi/BLE at 2400 MHz. In particular, the antenna structure at 1575 MHz is integrated within a CE2354 battery holder and operates as a circularly polarized design. With these properties, the proposed antenna is suitable for wearable positioning devices.