Current spirometers on the market often have retail prices of over $1,000. As a result of this high cost, many physicians practicing in developing countries lack the resources to purchase spirometry equipment. The development of a low-cost, reliable spirometer would allow these physicians to make more quantitative assessments of their patients' pulmonary health. A standardized coaching program ...

A low-cost and portable vector network analyzer (VNA) which covered operating frequency between 1MHz to 3GHz is used for vector reflection coefficient and standing wave ratio (swr) of the various microstrip antennas. This paper presents measurements of various ultra wideband (uwb) microstrip antennas for applications in biomedical field. Selection of antenna is an important key for detection of...