Adaptive antenna system by ESP32-PICO-D4 and its application to web radio system

TL;DR

This paper presents a compact adaptive Wi-Fi antenna system using ESP32-PICO-D4, enhancing wireless stability in high congestion environments for applications like web radio.

Contribution

It introduces a simple, integrated adaptive antenna system leveraging ESP32-PICO-D4 for improved wireless communication in IoT environments.

Findings

Effective antenna adjustment improves signal reception.

Compact design suitable for web radio applications.

Demonstrates reliable Wi-Fi communication in congested areas.

Abstract

Adaptive antenna technique has an important role in the IoT environment in order to establish reliable and stable wireless communication in high congestion situation. Even if knowing antenna characteristics in advance, electromagnetic wave propagation in the non-line-of-sight environment is very complex and unpredictable, therefore, the adjustment the antenna radiation for the optimum signal reception is important for the better wireless link. This article presents a simple but effective adaptive antenna system for Wi-Fi utilizing the function of a highly integrated component, ESP32-PICO-D4. This chip is a system-in-chip containing all components for Wi-Fi and Bluetooth application except for antenna. Together with SP3T RF switch and dielectric antennas and high-resolution audio DAC, completed web-radio system is made in the size of 50 x 50 mm.