Image Transmission Circuit Design Based on Lora System

In recent years, China has faced severe impacts from typhoons, ranking among the countries with the highest losses globally due to these natural disasters. Since 1972, China has prioritized the investigation of typhoon formation mechanisms, trajectory forecasting, and intensity prediction. Current research efforts have concentrated on precise typhoon detection, aiming to conduct fine direct observations within the typhoon core. This paper presents the design of a wireless image transmission circuit utilizing LoRa technology, specifically tailored for downcast sounding applications. Comprising a main control chip's minimum system, a camera module, and an RF antenna circuit, the system integrates the STM32WLE5J8 chip - the world's first microprocessor and RF subsystem two-in-one chip supporting various modulation modes, along with the low-power and compact U.S. Howe Technology OV5640 camera module. The RF antenna, designed with a PE4259 RF switch structure and filter, facilitates mode switching and mitigates clutter to a certain extent. The entire hardware design of the wireless image transmission system is accomplished within the unified design environment of Altium Designer printed circuit boards, encompassing component selection, schematic design, and PCB layout. The final product is a compact, low-power PCB board measuring 5.1cm in length and 4.7cm in width, adaptable to STM32 platform development and proficient in utilizing LoRa communication technology for image data transfer in typhoon environments - offering significant practical insights for application.