In modern days, Microstrip patch antennas become more popular because of its fascinating features such as low cost, light weight, low profile planar configuration which can be effortlessly made conformal to host surface. In order to overcome the demerits of patch antenna like low gain, low efficiency, low directivity and narrow bandwidth, it is obligatory to implement patch antennas in array configuration by creating cuts in the ground, by increasing the height of patch, rising the substrate thickness and by decreasing the permittivity of the substrate. Percentage of bandwidth of the patch antenna can also be increased by the above mentioned techniques. Circuit board FR4 (Flame Retardant 4) is used for designing this patch antenna, since it has fabulous performance during the fabrication process. In this paper, design of two layered electromagnetically coupled rectangular patch antenna with microstrip-line inset-fed with minimized return loss has been proposed for the wireless devices.
A light and portable wireless biosignal retrieving system has always been a medical dream. This proposed wireless-type biosignal alerting system aims at designing and developing a module that detects the abnormal interpretations in the PQRST complex (electrocardiography) and heart rate of a patient in advance, gives a self-warning ring to the patient, and also sends a short message service warning to the doctor's mobile phone through the Global System for Mobile Communication. This system is a solution to supplement the limitations in conventional clinic examination such as the difficulty in capturing rare events, out-of-hospital monitoring of patients' heart status, and the immediate dissemination of the physician's instruction to the patient. These study results have immense consequence in researching, finding, and preventing epidemics in the cardiovascular system for the entire world.
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