Compact hybrid EBG microstrip antenna for wearable applications

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Frequenz Pub Date : 2023-05-29 DOI:10.1515/freq-2023-0009

T. Pawase, Akshay Malhotra, Anurag Mahajan

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Abstract

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.

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用于可穿戴应用的紧凑型混合型EBG微带天线

摘要本文设计、分析和研究了一种用于全球定位系统（GPS）的新型带线馈电圆极化环形缝隙双频天线，该天线采用混合电磁带隙（EBG）结构，可用于可穿戴应用。通过调整辐射贴片上环形槽的半径，实现了良好的圆偏振（CP）辐射和阻抗匹配。该设计展示了基于Kapton的灵活、稳健和低剖面的解决方案，介电常数为3.4，以满足可穿戴应用的要求。由于动物身体的高损耗，电磁带隙（EBG）结构被用来减少背辐射和频率失谐的影响。所提出的天线结构还将前后比（FBR）提高了10 dB。该天线尺寸为0.56λ0×0.4913λ0×0.002λ0，使用柔性Kapton衬底进行分析。优化的混合EBG结构提供了优异的比吸收率（SAR）以及所有其他天线参数，在1.13的基于GPS的可穿戴应用范围内 GHz和1.157 GHz频带。因此，所提出的天线是基于GPS的跟踪和无线体域网（WBAN）应用的合适候选者。所提出的天线也在制造时进行了测试，测量结果与模拟结果一致。

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来源期刊

Frequenz 工程技术-工程：电子与电气

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

3 months

期刊介绍： Frequenz is one of the leading scientific and technological journals covering all aspects of RF-, Microwave-, and THz-Engineering. It is a peer-reviewed, bi-monthly published journal. Frequenz was first published in 1947 with a circulation of 7000 copies, focusing on telecommunications. Today, the major objective of Frequenz is to highlight current research activities and development efforts in RF-, Microwave-, and THz-Engineering throughout a wide frequency spectrum ranging from radio via microwave up to THz frequencies. RF-, Microwave-, and THz-Engineering is a very active area of Research & Development as well as of Applications in a wide variety of fields. It has been the key to enabling technologies responsible for phenomenal growth of satellite broadcasting, wireless communications, satellite and terrestrial mobile communications and navigation, high-speed THz communication systems. It will open up new technologies in communications, radar, remote sensing and imaging, in identification and localization as well as in sensors, e.g. for wireless industrial process and environmental monitoring as well as for biomedical sensing.