This paper introduces the CPW fed monopole antenna operating at multiple frequencies covering Ultra High Frequency (UHF) bands, suitable for biomedical applications. The planar antenna structure comprises an open loop and a dual folded monopole of optimized length. The antenna exhibits ultra-wideband frequency of operation ranges from 740 MHz to 4.02 GHz covering the frequency bands suitable for head imaging and heart failure detection. The proposed antenna has a compact size of 0.098λ × 0.079λ × 0.019λ where λ indicates wavelength corresponding to the lowest operating frequency. The antenna is further simulated on the human head model to corroborate applications for brain stroke detection. The specific absorption rate (SAR) value of the proposed antenna is compliant with SAR requirements set by IEEE standards. To experimentally verify the parameters of the proposed antenna design, the antenna is tested on the brain tissue model prepared by materials having dielectric properties like human brain tissue. The peak gain of the antenna, when tested on the human phantom, is 6.8 dBi.

中文翻译：

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用于脑卒中检测的紧凑型宽带折叠条形单极天线

本文介绍了适用于生物医学应用的在多个频率下工作的 CPW 馈电单极天线，涵盖超高频 (UHF) 频段。平面天线结构包括一个开环和一个优化长度的双折叠单极子。该天线具有从 740 MHz 到 4.02 GHz 的超宽带工作频率，涵盖适用于头部成像和心力衰竭检测的频段。所提出的天线具有 0.098λ × 0.079λ × 0.019λ 的紧凑尺寸，其中 λ 表示对应于最低工作频率的波长。该天线在人头模型上进一步模拟，以证实脑卒中检测的应用。拟议天线的特定吸收率 (SAR) 值符合 IEEE 标准设定的 SAR 要求。为了通过实验验证所提出的天线设计的参数，天线在由具有介电特性的材料（如人脑组织）制备的脑组织模型上进行测试。在人体模型上测试时，天线的峰值增益为 6.8 dBi。