Publication: Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array
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2022-04-15
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MDPI AG
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Abstract
A novel feeding method for linear DRA arrays is presented, illuminating the use of the
power divider, transitions, and launchers, and keeping uniform excitation to array elements. This
results in a high-gain DRA array with low losses with a design that is simple, compact and inexpensive.
The proposed feeding method is based on exciting standing waves using discrete metallic patches in
a simple design procedure. Two arrays with two and four DRA elements are presented as a proof of
concept, which provide high gains of 12 and 15 dBi, respectively, which are close to the theoretical
limit based on array theory. The radiation efficiency for both arrays is about 93%, which is equal to
the array element efficiency, confirming that the feeding method does not add losses as in the case of
standard methods. To facilitate the fabrication process, the entire array structure is 3D-printed, which
significantly decreases the complexity of fabrication and alignment. Compared to state-of-the-art
feeding techniques, the proposed method provides higher gain and higher efficiency with a smaller
electrical size.
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Keywords
Antenna array feeds, Dielectric resonator antenna (dra), Linear antenna arrays, Standing, Wave, High-gain antennas, High radiation efficiency, 3d printing
Bibliographic citation
Abdalmalak, K. A., Althuwayb, A. A., Lee, C. S., Botello, G. S., Falcón-Gómez, E., García-Castillo, L. E., & García-Muñoz, L. E. (2022). Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array. In Sensors, 22(8), 3089-3104