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Enhancing Bandwidth and Efficiency with Slotted Ground Planes Embedding Antenna Boosters
Sabrina Arús1, Joan Navarro1, Joan L Pijoan1
1Smart Society Research Group, Universitat Ramon Llull, 08022 Barcelona, Spain.
Micromachines
|March 27, 2025
Summary
Improving antenna efficiency is key for IoT devices. Adding a slot to the ground plane enhances bandwidth and antenna efficiency by 2 dB for reliable, long-lasting wireless communication.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Wireless Communication Systems
Background:
- The proliferation of wireless devices, including the Internet of Things (IoT), necessitates efficient antenna systems.
- Battery consumption in wireless devices is directly linked to antenna system efficiency, crucial for long operational life.
- Optimizing antenna performance is vital for reliable data transmission, especially in low-power IoT applications.
Purpose of the Study:
- To investigate the impact of ground plane modification on antenna performance.
- To enhance bandwidth and antenna efficiency in the 824-960 MHz frequency band for IoT devices.
- To explore a cost-effective method for improving wireless device communication.
Main Methods:
- Simulations were conducted to analyze the effect of ground plane slots on antenna characteristics.
- Three distinct printed circuit boards (PCBs) were designed to represent various IoT device form factors.
- A physical prototype was constructed to validate simulation findings.
Main Results:
- Introducing a slot in the ground plane enlarges current distribution.
- This modification excites the antenna's fundamental mode, significantly improving performance.
- Antenna efficiency and bandwidth were enhanced by 2 dB.
Conclusions:
- Shaping the ground plane by adding a slot is an effective technique to boost antenna efficiency and bandwidth.
- This method offers a practical solution for enhancing the performance of IoT devices operating in the 824-960 MHz range.
- The study validates the simulation results through a physical prototype, confirming the approach's viability.
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