Future concepts for wide band antenna radar systems

Author(s):  
C. Baker





Author(s):  
Nesem Keskin ◽  
Sinan Aksimsek ◽  
Nurhan Turker Tokan

Abstract In this article, we present a simple, low-cost solution for the gain enhancement of a conventional pyramidal horn antenna using additive manufacturing. A flat, metamaterial lens consisting of three-layer metallic grid wire is implemented at the aperture of the horn. The lens is separated into two regions; namely epsilon-positive and epsilon-near-zero (ENZ) regions. The structure of the ENZ region is constructed accounting the variation of relative permittivity in the metamaterial. By the phase compensation property imparted by the metamaterial lens, more focused beams are obtained. The simulated and measured results clearly demonstrate that the metamaterial lens enhances the gain over an ultra-wide frequency band (10–18 GHz) compared to the conventional horn with the same physical size. A simple fabrication process using a 3D printer is introduced, and has been successfully applied. This result represents a remarkable achievement in this field, and may enable a comprehensive solution for satellite and radar systems as a high gain, compact, light-weighted, broadband radiator.



2017 ◽  
Vol 7 (1.1) ◽  
pp. 333 ◽  
Author(s):  
B T P Madhav ◽  
V Subba Reddy ◽  
D Rajasekar Reddy ◽  
K Ravi Sankar ◽  
E V.S.Harsha Ramanujan ◽  
...  

A tree shaped fractal antenna with U shaped slot and W-shaped slot has been designed and analyzed in this article by using ANSYS elec-tromagnetic desktop 17. The proposed antenna is analyzed taking FR4 substrate is taken as the substrate material. The proposed antenna exhibits multiband characteristics (2.75-3.17GHz, 4.1-4.8GHz, 5.1-5.3GHz and 5.4-6.3GHz, 7.21-12.8GHz) in the Ultra-wide band region. The path that is radiating by superposition of the rectangular patches and multiple-band operating frequency is obtained by increasing the U-shapes slots and w-shaped slot on the patch. The improvement in the impedance characteristics between the adjacent frequencies is achieved by using defected ground structure (DGS) on the ground plane as to cover the region of UWB application (3.1-10.6GHz). The proposed antenna works in the applications like Wi-Max, Weather forecasting RADAR systems and WLAN. 





2012 ◽  
Vol 229-231 ◽  
pp. 1618-1621
Author(s):  
Ming Jiang ◽  
Li Zhong Song

The Archimedean spiral (ARSP) antenna is widely used in many wide band electronic systems due to its good radiation performances. This paper designed and fabricated a specific planar ARSP antenna within the operating frequency range of 1 GHz to 9GHz. The meander line technique was employed to miniaturize the planar ARSP antenna. The designed ARSP antenna was fed by a wide band miniaturized bent microstrip Balun. The diameter of the fabricated ARSP antenna was 82 millimeters. A metal cavity filled with absorber materials was used to obtain the unidirectional radiation patterns and its height was 30 millimeters. The parameters of designed ARSP antenna were determined by numerical simulations. A practical designed ARSP antenna was fabricated according to designed parameters and the experimental results of the fabricated ARSP antenna are provided. The experimental research results demonstrate that the fabricated ARSP antenna has radiation performances of wide beam and approximately circular polarization. The fabricated ARSP antenna can be used in several practical electronic systems such as wide band radar systems.



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