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A microstrip antenna design is introduced in which a rectangular microstrip patch is coupled electromagnetically with a gridded rectangular patch placed above. The gridded patch consists of nine identical rectangular parts separated by a distance which is much smaller than a free space wavelength for a central frequency. The antenna is designed to operate in the 60 GHz band and is fabricated on a
Yersiniosis and shigellosis are two bacteria-borne and food-related diseases that lead to significant costs in terms of direct costs (costs of healthcare, medicine, rehabilitation etc.), indirect costs (lost productivity due to absenteeism) and intangible costs (pain, nausea and other intangible aspects that can be linked to disease). It is essential to estimate these costs, partly to be able to c
The objective of this paper is to review some recently developed sum rules and physical bounds in scattering and antenna theory. The sum rules are based on identities for Herglotz functions that relate the quantity of interest integrated over all wavelengths with its static polarizability dyadics. They are transformed to physical bounds by applying variational principles for the polarizability dya
