scholarly journals LOW RCS MICROSTRIP PATCH ARRAY WITH HYBRID HIGH IMPEDANCE SURFACE BASED GROUND PLANE

2020 ◽  
Vol 94 ◽  
pp. 75-84
Author(s):  
Avinash Singh ◽  
Hema Singh
Keyword(s):  
Ground Plane ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Microstrip Patch ◽  
High Impedance ◽  
High Impedance Surface

scholarly journals A Study of a Wide-Angle Scanning Phased Array Based on a High-Impedance Surface Ground Plane

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Tian Lan ◽  
Qiu-Cui Li ◽  
Yu-Shen Dou ◽  
Xun-Ya Jiang
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Ground Plane ◽  
Wide Angle ◽  
Impédance Surface ◽  
Impedance Surface ◽  
The Real ◽  
Reflection Phase ◽  
High Impedance ◽  
High Impedance Surface

This paper presents a two-dimensional infinite dipole array system with a mushroom-like high-impedance surface (HIS) ground plane with wide-angle scanning capability in the E-plane. The unit cell of the proposed antenna array consists of a dipole antenna and a four-by-four HIS ground. The simulation results show that the proposed antenna array can achieve a wide scanning angle of up to 65° in the E-plane with an excellent impedance match and a small S11. Floquet mode analysis is utilized to analyze the active impedance and the reflection coefficient. Good agreement is obtained between the theoretical results and the simulations. Using numerical and theoretical analyses, we reveal the mechanism of such excellent wide scanning properties. For the range of small scanning angles, these excellent properties result mainly from the special reflection phase of the HIS ground, which can cause the mutual coupling between the elements of the real array to be compensated by the mutual coupling effect between the real array and the mirror array. For the range of large scanning angles, since the surface wave (SW) mode could be resonantly excited by a high-order Floquet mode TM−1,0 from the array and since the SW mode could be converted into a leaky wave (LW) mode by the scattering of the array, the radiation field from the LW mode is nearly in phase with the direct radiating field from the array. Therefore, with help from the special reflection phase of the HIS and the designed LW mode of the HIS ground, the antenna array with an HIS ground can achieve a wide-angle scanning performance.

Elimination of Scan Blindness in Rectangular Waveguide End-Slot Phased Arrays Using High-Impedance Surface

2013 ◽  
Vol 373-375 ◽  
pp. 1569-1572
Author(s):  
Lei Liu ◽  
Qiang Gao
Keyword(s):  
Surface Waves ◽  
Rectangular Waveguide ◽  
Phased Array ◽  
Phased Arrays ◽  
Ground Plane ◽  
Impédance Surface ◽  
Impedance Surface ◽  
High Impedance ◽  
High Impedance Surface

High-impedance ground plane (HIGP) is applied in the design of rectangular waveguide end-slot phased array. The benefits of using such a HIGP are related to the suppression of surface waves because of its obvious frequency bandgap and, therefore, the scan blindness could be eliminated. Both of the bandgap curve of the HIGP structure and the scan properties of the phased arrays have been calculated. The elimination of scan blindness is obtained.

scholarly journals Compact Wideband Microstrip Patch Antenna based on High Impedance Surface

2018 ◽  
Vol 8 (4) ◽  
pp. 3149-3152
Author(s):  
S. Nelaturi ◽  
N. V. S. N. Sarma
Keyword(s):  
Patch Antenna ◽  
Return Loss ◽  
Axial Ratio ◽  
Fractal Boundary ◽  
Impédance Surface ◽  
Impedance Surface ◽  
Microstrip Patch ◽  
High Impedance ◽  
Close Relationship ◽  
High Impedance Surface

A compact single probe feed asymmetrical semicircular fractal boundary patch antenna based on HIS (high impedance surface) is proposed for wide bandwidth at Wi-Fi band. Circular polarization operation can be obtained by embedding semi-circle fractal curves along the edges of the square patch antenna. The 10-dB return loss bandwidth is 15.13% (2.32GHz-2.70GHz). The 3-dB axial ratio bandwidth is 4.11% (2.38GHz-2.48GHz). The close relationship between simulation results and measured results establishes the antenna usefulness.

Elimination of Scan Blindness in Rectangular Waveguide End-Slot Phased Arrays Using High-Impedance Surface

2011 ◽  
Vol 130-134 ◽  
pp. 3200-3203
Author(s):  
Wei Zhu ◽  
Xv Fu Lu ◽  
Qiang Gao
Keyword(s):  
Surface Waves ◽  
Rectangular Waveguide ◽  
Phased Array ◽  
Phased Arrays ◽  
Ground Plane ◽  
Impédance Surface ◽  
Impedance Surface ◽  
High Impedance ◽  
High Impedance Surface

High-impedance ground plane (HIGP) is applied in the design of rectangular waveguide end-slot phased array. The benefits of using such a HIGP are related to the suppression of surface waves because of its obvious frequency bandgap and, therefore, the scan blindness could be eliminated. Both of the bandgap curve of the HIGP structure and the scan properties of the phased arrays have been calculated. The elimination of scan blindness is obtained.

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