Journal ArticleDOI
Hybrid Subarray Using a New Concept of Feed for Advanced Antenna and Array Designs
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TLDR
This work explores a hybrid subarray where a pair of dielectric resonator antennas are fed with identical phase and polarization by a resonant microstrip patch sharing a common grounded substrate resulting in a large radiating aperture and improved gain.Abstract:
This work explores a hybrid subarray where a pair of dielectric resonator antennas (DRAs) are fed with identical phase and polarization by a resonant microstrip patch sharing a common grounded substrate. The elegance of the structure is to maintain the resonance features of the individual patch and DRA elements resulting in a large radiating aperture and improved gain. A $C$ -band design promises 9.5–12.5 dBi gain indicating 5 dB improvement on average compared to that of the individual elements. Accurate deployment required for effective feeding of the DRAs in the subarray and the subarray sidelobe-level dependence on its aperture fields has been discussed. A comprehensive design guideline has been presented to enable one to accurately designing it in any specified frequency within the given limit. This antenna has been experimented to realize different array configurations. The linear array featuring zero interelement spacing emerges as a compact high-gain configuration with a reduced number of feed requirements. Typically, a 1.75 subarray unit (5 elements linear) to 2 subarray unit (rectangular) array is found to result inasmuch as 14.5 dBi peak gain. This design should find potential applications where high gain is required using minimal feeding structures.read more
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Book ChapterDOI
Executive
TL;DR: This study examined to what degree performance on WAIS-IV verbal subtests predicts performance on executive functioning measures (Trails Making-B, Category, and Wisconsin Card Sort Test) and found Categories is the best predictor.
Proceedings ArticleDOI
Hybrid Dielectric Resonator Antenna: Innovations Over the Decades and State-of-the-Art Techniques
TL;DR: In this paper , all kinds of Hybrid DRA explored in the last two decades including some state-of-the-art techniques are discussed. But the authors focus on the hybrid DRA design.
Hybrid Dielectric Resonator Antenna: Innovations Over the Decades and State-of-the-Art Techniques
TL;DR: This paper is aimed to portray all kinds of Hybrid DRAs explored in the last two decades including some state-of-the-art techniques.
References
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Journal ArticleDOI
Dielectric Resonator Antennas: A Historical Review and the Current State of the Art
Aldo Petosa,A. Ittipiboon +1 more
TL;DR: In this paper, the authors present a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades and highlight major research activities in each decade.
Journal ArticleDOI
Dielectric Resonator Antennas: From the Basic to the Aesthetic
TL;DR: The basic characteristics of dielectric resonator antennas are explained, with emphasis on the effect of the form factor on their resonance (operating) frequencies.
Improved bandwidth of microstrip antennas using parasitic elements
TL;DR: In this paper, a method for doubling the bandwidth of rectangular microstrip patch antennas by locating capacitively excited λ m ��/4 short circuit parasitic elements at their radiating edges is described.
Journal ArticleDOI
Higher Order Mode Excitation for High-Gain Broadside Radiation From Cylindrical Dielectric Resonator Antennas
TL;DR: In this paper, a cylindrical dielectric resonator antenna (CDRA) has been examined with a view for using it as another radiating mode with broadside radiation patterns.
Journal ArticleDOI
Resonant frequency of circular microstrip antennas with and without air gaps
TL;DR: In this article, an improved analytical model is presented for calculating the resonant frequency of circular microstrip antennas with and without air gaps, which is widely applicable to all patch diameters-from very large to very small compared to the height of the dielectric medium below the patch.
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