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Performance Analysis of Wearable Dual-Band Patch Antenna Based on EBG and SRR Surfaces
Abdul Wajid1, Ashfaq Ahmad2, Sadiq Ullah1
1Department of Telecommunication Engineering, University of Engineering and Technology Mardan, Mardan 23200, Pakistan.
Sensors (Basel, Switzerland)
|July 27, 2022
Summary
A new split-ring resonator (SRR)-based antenna design offers superior performance for wearable Internet of Things (IoT) applications. This compact, dual-band antenna is efficient and safe for biomedical sensors, even when bent.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Wearable antennas are crucial for Internet of Things (IoT) applications, particularly in sensor networks.
- Existing conventional antennas face challenges in achieving compactness and dual-frequency operation for modern wearable devices.
- Metamaterials, such as split-ring resonators (SRR) and electromagnetic bandgaps (EBG), offer potential solutions for antenna enhancement.
Purpose of the Study:
- To compare the performance of a conventional dual-band antenna with SRR- and EBG-based designs.
- To evaluate antenna suitability for wearable sensor networks and Internet of Things (IoT) applications.
- To assess antenna performance using wash cotton as a substrate, considering its dielectric properties.
Main Methods:
- Design and simulation of three dual-band antennas: conventional, EBG-based, and SRR-based.
- Utilizing wash cotton (relative permittivity of 1.51) as the substrate material for all designs.
- Comparison of radiation characteristics including return loss, gain, efficiency, and radiation patterns.
- Specific Absorption Rate (SAR) analysis for user safety and performance evaluation under bending conditions.
Main Results:
- The SRR-based antenna demonstrated superior performance, exhibiting higher gain and better surface wave suppression.
- The SRR antenna achieved a gain of 7.39 dBi, bandwidth of 374 MHz, and efficiency of 64.7% at 5.4 GHz.
- Performance under bending conditions showed a gain of 6.22 dBi and efficiency of 52.45%, indicating robustness.
- All three antennas were designed to be compact, suitable for biomedical sensors, with SAR analysis confirming user safety.
Conclusions:
- The SRR-based antenna design is highly efficient, compact, and suitable for wearable IoT and biomedical sensor applications.
- The use of wash cotton as a substrate is viable for wearable antenna development.
- The proposed antenna maintains acceptable performance even under bent conditions, making it practical for real-world use.
