Abstract
In this paper, high directive antenna using metamaterial property is presented for wireless medical systems. The antenna is constructed by semi-circular patch and hexagonal closed ring resonator (HCRR). For medical applications such as wireless patient movement monitoring, telemetry and telemedicine, communication devices working at ISM band frequency is needed. Here, the requirement is completed with improved directivity such as 16 dBi. And also impedance matching also achieved with low reflection loss -20 dB. This antenna works for multiple frequency bands (Industrial, Scientific and Medical-ISM 2.45 GHz, WLAN 5.3 GHz and GSM 1.9 GHz) with improved directivity.
Highlights
Recent years metamaterial, a new design methodology contributes mainly in medical applications such as diagnosis of cancer cells, cancer treatment, patient monitoring, brain signal analysis, communication devices within body and body temperature, blood pressure monitoring etc., In this related works, the reduced size of the antenna is aimed
This is performed by positioning the array structure between two positive and negative ports on x-axis and a transverse electromagnetic (TEM) wave is sent along this waveguide port
The proposed semi-circular patch antenna is simulated for 1 - 10 GHz frequency range
Summary
A new design methodology contributes mainly in medical applications such as diagnosis of cancer cells, cancer treatment, patient monitoring, brain signal analysis, communication devices within body and body temperature, blood pressure monitoring etc., In this related works, the reduced size of the antenna is aimed. The antenna consists of hexagonal shape metamaterial resonators at ground plane to reduce the back wave propagation which harms patient body tissues. Since the ground plane comprises of hexagonal metamaterials, it may be considered as defective ground structure antenna. Jie et al [7] developed a monopole antenna for GSM applications such as 850 MHz, 900 MHz and Directive Communications Systems 1710 - 1880 MHz. In [8], Chen et al designed T-shape microstrip antenna with modified design methodology which works for multiband frequencies. In [9], Sung et al developed L-shaped antenna with modified structure operates at 3.51 GHz frequency band. A high directive antenna is proposed with defective ground structure. A hexagonal shape resonator is imported at ground side of antenna in order to reduce the back propagation towards human body
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