一位开发者为成本仅约2欧的ESP32-C3 SuperMini模块设计了简单的天线改装方案。[1]该方案通过在原有SMD天线基础上添加31毫米银镀线四分之一波长天线，实现了6dB至10dB以上的信号增益。[1]改装后模块的WiFi连接范围显著扩展，在信号弱或有障碍的环境中表现优于原装天线。[1]
改装工艺采用焊接方式将天线连接至SMD天线两端，同时保留原PCB天线。[1]根据测试结果，每增益6dB理论上对应WiFi覆盖范围翻倍。[1]原装天线型号为CrossAir CA-C03。[1]
A developer has demonstrated a straightforward antenna modification for the ESP32-C3 SuperMini module, a microcontroller board with a cost of approximately 2 euros, that significantly improves wireless connectivity [1]. By adding a 31-millimeter quarter-wave antenna made of 1.0-millimeter silver-plated wire to the existing SMD antenna, the modification delivers signal gains of at least 6 decibels on average, with gains exceeding 10 decibels possible in weak or interference-prone environments [1].
The modification is implemented by soldering the external antenna to both ends of the existing Surface Mount Device antenna while preserving the original PCB antenna [1]. The original antenna integrated into the module is a CrossAir CA-C03 model [1]. According to the testing data presented, the signal improvement translates into practical coverage expansion—theoretically, each 6-decibel gain doubles the WiFi coverage range [1]. The enhanced module demonstrates substantially improved connectivity in areas with poor signal reception or physical obstacles compared to its unmodified counterpart [1].