scholarly journals Fence Shaping of Substrate Integrated Fan-Beam Electric Dipole for High-Band 5G

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 545 ◽  
Author(s):  
Waleed El-Halwagy ◽  
Rashid Mirzavand ◽  
Jordan Melzer ◽  
Masum Hossain ◽  
Pedram Mousavi
Keyword(s):  
Electric Dipole ◽  
Dipole Antenna ◽  
Geometric Shape ◽  
Degree Of Freedom ◽  
Radiation Characteristics ◽  
Wide Bandwidth ◽  
Frequency Bands ◽  
Additional Degree ◽  
High Band ◽  
24 Ghz

This work presents fence shaping for dipole antenna operating at 5G high-band frequencies. A via fence is employed around the dipole to suppress back radiation. By varying the geometric shape of the fence, the dipole’s radiation characteristics can be controlled, which adds an additional degree of freedom to the design. This was investigated by studying different fence shapes, namely rectangular-, U-, and V-shaped fences. The wide bandwidth (higher than 6.5 GHz) centered around 28 GHz, and the stable radiation performance from 24 GHz to 32 GHz made the proposed structure capable of supporting multiple 5G frequency bands and the fence shaping help modulate the gain and HPBW of the dipole. All fabricated prototypes attained front-to-back radiation ratio (F/B) higher than 36 dB, with good gain/HPBW performances of 14.1 dBi/103.7°, 13.5dBi/118°, and 12.6 dBi/133° from the V-fence, U-fence, and rectangular fence 4 × 1 arrays, respectively.

scholarly journals AUXILIARY QUANTIZATION CONSTRAINTS ON THE VON ROOS ORDERING-AMBIGUITY AT ZERO BINDING ENERGIES; AZIMUTHALLY SYMMETRIZED CYLINDRICAL COORDINATES

2013 ◽  
Vol 28 (19) ◽  
pp. 1350082
Author(s):  
OMAR MUSTAFA
Keyword(s):  
Binding Energies ◽  
Degree Of Freedom ◽  
Zero Energy ◽  
Cylindrical Coordinates ◽  
Additional Degree ◽  
Quantum Numbers ◽  
Dependent Mass ◽  
Position Dependent Mass

Using azimuthally symmetrized cylindrical coordinates, we report the consequences of zero-energy quantal states on the von Roos Hamiltonian. A position-dependent mass (PDM) M(ρ, φ, z) = bzjρ2υ+1/2 is used. We show that the zero-energy setting not only offers an additional degree of freedom toward feasible separability for the von Roos Hamiltonian, but also manifestly yields auxiliary quantized ambiguity parametric constraints (i.e. the ambiguity parameters are given in terms of quantum numbers).

scholarly journals A Novel Dual-Polarized Wideband and Miniaturized Low Profile Magneto-Electric Dipole Antenna Array for mmWave 5G Applications

2021 ◽  
Vol 2 ◽  
pp. 326-334
Author(s):  
Yin Chen Chang ◽  
Ching Cheng Hsu ◽  
M. Idrees Magray ◽  
Hsu Yung Chang ◽  
Jenn-Hwan Tarng
Keyword(s):  
Antenna Array ◽  
Electric Dipole ◽  
Dipole Antenna ◽  
Low Profile ◽  
Dual Polarized
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