Compact hybrid EBG microstrip antenna for wearable applications

Trupti Pawase; Akshay Malhotra; Anurag Mahajan

doi:10.1515/freq-2023-0009

Article

Compact hybrid EBG microstrip antenna for wearable applications

Trupti Pawase , Akshay Malhotra and Anurag Mahajan

Published/Copyright: May 29, 2023

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From the journal Frequenz Volume 77 Issue 11-12

Abstract

A novel strip line fed, circularly polarized (CP), annular slotted dual band antenna using hybrid electromagnetic band gap (EBG) structure for Global Positioning System (GPS) has been herein designed, analyzed, and investigated for wearable applications. Adjusting the radii of the annular slots on the radiating patch excellent circular polarized (CP) radiation and impedance matching is achieved. The design demonstrates Kapton based flexible, robust, and low-profile solution with permittivity of 3.4 to meet the requirements of wearable applications. Due to the high losses of the animal body, the electromagnetic band gap (EBG) structure is used to reduce back radiation and the effect of frequency detuning. The proposed antenna structure also enhances the front-to-back ratio (FBR) by 10 dB. This antenna with dimensions 0.56λ₀ × 0.4913λ₀ × 0.002λ₀ analyzed using a flexible Kapton substrate. Optimized hybrid EBG structure provides an excellent Specific Absorption Rate (SAR) along with all other antenna parameters, within acceptable for GPS-based wearable applications at 1.13 GHz and 1.157 GHz frequency band. Therefore the proposed antenna is a suitable candidate for GPS-based tracking and wireless body area network (WBAN) applications. The proposed antenna was also tested upon fabrication and the measured results agree with simulated results.

Keywords: GPS; Kapton; polarization; reflection coefficient; VSWR; wearable

Corresponding author: Anurag Mahajan, Symbiosis Institute of Technology, Symbiosis International (Deemed University), (SIU), Lavale, Pune, Maharashtra, India, E-mail: anurag.mahajan@sitpune.edu.in

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2023-01-10

Accepted: 2023-05-02

Published Online: 2023-05-29

Published in Print: 2023-12-15

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Articles in the same Issue

https://doi.org/10.1515/freq-2023-0009

Keywords for this article

GPS; Kapton; polarization; reflection coefficient; VSWR; wearable