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The electromagnetic field excited by an electric line source in the presence of a printed structure periodic along two directions with arbitrary geometry of the metallization is calculated. The Array Scanning Method (ASM) is adopted to express the field excited by the aperiodic source in terms of an integral superposition of suitable auxiliary Floquet-periodic fields. The latter are solutions of electric-field...
We demonstrate how the recently proposed approach to create artificial ldquomaterialsrdquo with so-called transmission-line networks can be used in microwave lens antenna design. A two-dimensional transmission-line network is designed in such a way that wave propagation inside the network is nearly isotropic, and furthermore, the network is well coupled to the surrounding medium, which in this case...
A directivity of radiation from a line source coupled to 2D electromagnetic crystals is investigated using a Fabry-Perot resonator model for the coupled radiating structure. It is shown that the directivity is characterized by the transmission windows of the electromagnetic crystals in the frequency and angular spectral domains and the transverse resonance condition in the space surrounded by the...
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