Book ChapterDOI
Dielectric Resonator Antennas
H. K. Ng,Kwok Wa Leung +1 more
TLDR
Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article, where a parasitic patch is used to excite a nearly degenerate mode.Abstract:
Linearly and circularly polarized conformal strip-fed dielectric resonator antennas (DRAs) are studied in this article. In the latter case, a parasitic patch is used to excite a nearly degenerate mode. The hemispherical DRA, excited in its fundamental broadside TE111 mode, is used for the demonstration. In the analysis, the mode-matching method is used to obtain the Green's functions, whereas the method of moments is used to solve for the unknown strip currents. In order to solve the singularity problem of the Green's functions, a recurrence technique is used to evaluate the impedance integrals. This greatly increases the numerical efficiency. Measurements were carried out to verify the calculations, with good results.
Keywords:
circularly polarized antenna;
dielectric antennas;
mode-matching methods;
moment methods;
parasitic antennas;
resonanceread more
Citations
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Circularly Polarized Antennas
TL;DR: In this article, the authors focused on circularly polarized antennas and provided key definitions and governing equations of circular polarization, and extended the concept to the magnetic source counterparts and Huygens sources.
Journal ArticleDOI
3D Printed Dielectric Reflectarrays: Low-Cost High-Gain Antennas at Sub-Millimeter Waves
Payam Nayeri,Min Liang,Rafael Sabory-Garcia,Mingguang Tuo,Fan Yang,Michael E. Gehm,Hao Xin,Atef Z. Elsherbeni +7 more
TL;DR: In this paper, a low-loss and low-cost solution for high gain terahertz (THz) antennas is proposed, where variable height dielectric elements are used in the reflectarray designs.
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.
Patent
Wideband dielectric resonator antenna
Tze-Hsuan Chang,Jean-Fu Kiang +1 more
TL;DR: In this article, the antenna comprises a substrate, a feed conductor, a ground layer, a resonator and a short-circuited element, which is disposed on the first side connecting the ground layer.
Journal ArticleDOI
Aperture fed wideband circularly polarized rectangular stair shaped dielectric resonator antenna
TL;DR: In this article, a circularly polarized rectangular stair-shaped dielectric resonator antenna (DRA) is presented, which is excited by a narrow rectangular slot and rotated 45/spl deg/ with respect to the sides of the DRA to generate circular polarization.
References
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The resonant cylindrical dielectric cavity antenna
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Journal ArticleDOI
Dielectric resonator antennas—a review and general design relations for resonant frequency and bandwidth
R.K. Mongia,Prakash Bhartia +1 more
TL;DR: In this paper, a comprehensive review of the modes and the radiation characteristics of open dielectric resonators (DRs) of different shapes, such as cylindrical, spherical, and rectangular, is presented.
Journal ArticleDOI
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Journal ArticleDOI
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TL;DR: In this paper, a waveguide of new structure has been developed for millimeter-wave applications, which can be embedded in a substrate and is able to be wired in three dimensions, and its transmission characteristics are evaluated using a glass-ceramic substrate of dielectric constant, /spl epsiv/sub r/=5, and loss, tan /spl delta/=0.0008.