Abstract
Aperture Coupled Dielectric Resonator Antenna Embedded in a Secondary Substrate for Mechanical Firmness
Highlights
The versatility in design offered by dielectric resonator antennas (DRAs) make them attractive alternatives to other low-gain antennas such as microstrip antennas or wire antennas
A simple aperture-coupled rectangular dielectric resonator antenna (RDRA) is proposed where high permittivity radiating element is embedded on a secondary substrate of comparatively low permittivity than the radiating DRA
For large array design using DRA, instead of mounting each individual element on the ground plane, from our work we can think of an inhomogeneous uneven substrate on which high permittivity regions are formed as per design requirement for efficient radiation
Summary
The versatility in design offered by dielectric resonator antennas (DRAs) make them attractive alternatives to other low-gain antennas such as microstrip antennas or wire antennas. The excitable DRA modes strongly depend on the position of feeding source They are the main decisive factor for determining nature of radiation pattern of DRA. An array of DRAs has been designed from a single dielectric sheet with a lattice of holes using perforation technique. This technique of fabricating DRA arrays eliminates the requirement of positioning and bonding individual DRA elements in an array. A simple aperture-coupled RDRA is proposed where high permittivity radiating element is embedded on a secondary substrate of comparatively low permittivity than the radiating DRA (here FR4 is used as secondary substrate). The embedded array is operating at 6.684 GHz with peak gain of 13.4 dBi with an accurate broadside radiation pattern
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