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This Letter presents a low‐profile broadband cavity‐backed magneto‐electric (ME) dipole antenna fed by a substrate integrated waveguide aperture. To reduce the antenna profile, a U‐shaped slot is etched on the electric dipole. Compared to the traditional ME dipole antenna whose profile is generally 0.25λε, the thickness of the proposed radiation st...
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The propagation properties of light in optomechanical waveguide arrays (OMWAs) are studied. Due to the strong mechanical Kerr effect, the optical self-focusing and self-defocusing phenomena can be realized in the arrays of subwavelength dielectric optomechanical waveguides with the milliwatt-level incident powers and micrometer-level lengths. Compa...
Citations
... However, the ME-dipole antenna suffers from large thickness for its realization, which is quarter wavelength (0.25 λ 0 ) between the radiating patches and ground plane. Various methods have been proposed for obtaining low profile ME-dipole antennas like folded metal wall based magnetic dipole [8], electric dipole with etched U-shaped slot [9] and magnetic dipole formed by obtuse triangular shaped metal [10]. Although the overall thickness of ME-dipole antenna has been reduced but these methods tend to sacrifice the operating bandwidth of antenna. ...
A Ka-band dual-polarized low profile magneto-electric (ME) dipole antenna with wide operational bandwidth is proposed in this letter. A thin substrate with two-stage meandered vias is utilized for realization of the proposed antenna. The meandered vias aid in compensation of phase difference caused due to utilization of thin substrate. The thickness of proposed antenna is reduced from 0.25 λg to 0.11 λg by using these two-stage meandered vias. The low profile antenna topology results in bandwidth reduction which is neutralized by introducing asymmetric slots in the ground plane. Shorting pins are inserted for elimination of higher order TM21 mode of Ka-band that results in a uniform broadside radiation pattern due to excitation of fundamental TM10 mode. The proposed antenna covers whole Ka-band with operating frequencies from 26 – 42 GHz. A 1 × 4 antenna array is also designed and fabricated with a reasonable gain of 12.06 dBi and stable radiation patterns. Simulated and measurement results are presented with detailed justification.
The paper presents the results of a novel high-gain dual-band magneto-electric dipole (MED) antenna. The antenna comprises two pairs of horizontal metal plates of different heights that are excited by a Γ-shaped feedline structure. The antenna is entirely made of metal plates. Compared to traditional MED antennas, the proposed design exhibits dual-band operation with a higher radiation gain whose frequency ratio can be modified by simply adjusting the heights of the two magneto-electric dipole segments. This feature is necessary for cellular base-station applications. The operation and characteristics of the antenna are validated by the measurements. The measured results confirm the proposed antenna achieving fractional bandwidths of 13.31% (801.9-916.2 MHz) and 19.76% (1710.7-2085.7 MHz) for S11 ≤-10 dB. It has stable unidirectional radiation patterns and optimum radiation gains of 9.2 dBi and 7.8 dBi at the first and second operating bands, respectively.
