Near-Field Finite-Zone Focused Radiation From Reflector Antenna With Continuously Tapered Ellipsoidal Surface Curvatures

2019 ◽  
Vol 67 (10) ◽  
pp. 6344-6352 ◽  
Author(s):  
Hsi-Tseng Chou
Keyword(s):  
Near Field ◽  
Reflector Antenna ◽  
Ellipsoidal Surface

scholarly journals Ka-Band Lightweight High-Efficiency Wideband 3D Printed Reflector Antenna

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yu Zhai ◽  
Ding Xu ◽  
Yan Zhang
Keyword(s):  
High Efficiency ◽  
Near Field ◽  
Side Lobe ◽  
High Gain ◽  
Reflector Antenna ◽  
Field Analysis ◽  
Side Lobe Level ◽  
Ka Band ◽  
3D Printed ◽  
Reflecting Surface

This paper presents a lightweight, cost-efficient, wideband, and high-gain 3D printed parabolic reflector antenna in the Ka-band. A 10 λ reflector is printed with polylactic acid- (PLA-) based material that is a biodegradable type of plastic, preferred in 3D printing. The reflecting surface is made up of multiple stacked layers of copper tape, thick enough to function as a reflecting surface (which is found 4 mm). A conical horn is used for the incident field. A center-fed method has been used to converge the energy in the broadside direction. The proposed antenna results measured a gain of 27.8 dBi, a side lobe level (SLL) of −22 dB, and a maximum of 61.2% aperture efficiency (at 30 GHz). A near-field analysis in terms of amplitude and phase has also been presented which authenticates the accurate spherical to planar wavefront transformation in the scattered field.

Radiation pattern of parabolic reflector antenna from near-field measurements of coupled reflector

1989 ◽  
Vol 25 (7) ◽  
pp. 484
Author(s):  
M. Hoque ◽  
M. Hamid ◽  
A. Rahman ◽  
A.Z. Elsherbeni
Keyword(s):  
Radiation Pattern ◽  
Near Field ◽  
Field Measurements ◽  
Reflector Antenna ◽  
Parabolic Reflector

scholarly journals A Rigorous Method for Synthesis of Offset Shaped Reflector Antennas

2006 ◽  
Vol 2 (1-2) ◽  
pp. 29-49 ◽  
Author(s):  
Vladimir I. Oliker
Keyword(s):  
High Efficiency ◽  
Near Field ◽  
Nonlinear Partial Differential Equations ◽  
Reflector Antenna ◽  
Antenna System ◽  
New Method ◽  
Reflector Antennas ◽  
Strongly Nonlinear ◽  
The Subject ◽  
Over 40 Years

In this paper the problem of synthesis of offset shaped single reflector antenna is considered. This problem has to be solved when a reflector antenna system is required to control the field amplitude and/or phase on the far-field or on the output aperture in the near-field. Achieving high efficiency is a very important objective of the design and shaped reflector antennas are used for that purpose.The equations of the problem are strongly nonlinear partial differential equations which can not be analyzed by standard techniques. Though the problem has been the subject of study by many authors for over 40 years, up until recently, there were no rigorous theoretical results resolving completely the questions of existence and uniqueness. With few exceptions, authors have attacked the problem with heuristic numerical procedures, and, depending on the specific formulation, obtained different results not always in agreement with each other.In this paper a new method for solving the single reflector problem is presented. The new method allows a complete and mathematically rigorous investigation of this problem. Furthermore, the proposed method lends itself to a numerical implementation and we present here several examples.

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