Abstract
The development of compact passive and active wearable circular patch metamaterials antennas for communication, Internet of Things (IoT) and biomedical systems is presented in this paper. Development of compact efficient low-cost wearable antennas are one of the most significant challenges in development of wearable communication, IoT and medical systems. Moreover, the advantage of an integrated compact low-cost feed network is attained by integrating the antenna feed network with the antennas on the same printed board. The efficiency of communication systems may be increased by using efficient passive and active antennas. The system dynamic range may be improved by connecting amplifiers to the printed antenna feed line. Design, design considerations, computed and measured results of wearable circular patch meta-materials antennas with high efficiency for 5G, IoT and biomedical applications are presented in this paper. The circular patch antennas electrical parameters on the human body were analyzed by using commercial full-wave software. The circular patch metamaterial wearable antennas are compact and flexible. The directivity and gain of the antennas with Circular Split-Ring Resonators (CSRR) is higher by 2.5dB to 3dB than the antennas without CSRR. The resonant frequency of the antennas without CSRR is higher by 6% to 9% than the antennas with CSRR. The computed and measured bandwidth of the stacked circular patch wearable antenna with CSRR for IoT and medical applications is around 12%, for S11 lover than −6dB. The gain of the circular patch wearable antenna with CSRR is around 8dBi.
Highlights
Small wearable sensors and antennas have been analyzed and presented in several papers and books in the last twenty years, see [1,2,3,4,5]
Patch, printed Slot, PIFA, Loop and other printed antennas are used in 5G communication, Internet of Things (IoT) and biomedical systems [2,3,4,5,6]
An IoT ecosystem consists of web-enabled smart devices that use embedded processors, sensors and communication hardware to collect, send and act on data they acquire from their environments
Summary
Small wearable sensors and antennas have been analyzed and presented in several papers and books in the last twenty years, see [1,2,3,4,5]. Meta material structures may be used to design small antennas with high efficiency for wearable medical and IoT systems, [6,7,8,9,10,11,12,13,14,15,16]. Periodic split ring resonators (SRRs) and metallic posts structures may be used to design materials with specific dielectric constant and permeability as presented in [7,8,9,10,11,12,13,14,15,16]. An adaptive thermal-aware routing protocol for wireless body area network is presented in [30]. Sophistical analysis of continuously measured medical data of large number of medical centers patients may result in a better low-cost medical treatment
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