A two‐dimensional beam tilted Fabry‐Perot antenna based on a phase gradient partially reflecting surface

2019 ◽  
Vol 62 (2) ◽  
pp. 887-892 ◽  
Author(s):  
Yongtao Jia ◽  
Ying Liu ◽  
Xuerui Yang ◽  
Xu Yang ◽  
Lei Sun
Keyword(s):  
Two Dimensional ◽  
Phase Gradient ◽  
Fabry Perot ◽  
Reflecting Surface

scholarly journals Tilted Beam Fabry–Perot Antenna with Enhanced Gain and Broadband Low Backscattering

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 267
Author(s):  
Hassan Umair ◽  
Tarik Bin Abdul Latef ◽  
Yoshihide Yamada ◽  
Wan Nor Liza Binti Wan Mahadi ◽  
Mohamadariff Othman ◽  
...  
Keyword(s):  
Ground Plane ◽  
Frequency Selective Surface ◽  
Bottom Surface ◽  
Phase Gradient ◽  
Periodic Surface ◽  
Radar Signature ◽  
Incident Plane ◽  
Fabry Perot ◽  
Reflecting Surface ◽  
Peak Gain

Communication with low radar signature platforms requires antennas with low backscatter, to uphold the low observability attribute of the platforms. In this work, we present the design for a Fabry–Perot (F-P) cavity antenna with low monostatic radar cross section (RCS) and enhanced gain. In addition, peak radiation is tilted inthe elevation plane. This is achieved by incorporating phase gradient metasurface (PGM) with absorptive frequency selective surface (FSS). The periodic surface of metallic square loops with lumped resistors forms the absorptive surface, placed on top of a partially reflecting surface (PRS) with an intervening air gap. The double-sided PRS consists of uniform metallic patches etched in a periodic fashion on its upper side. The bottom surface consists of variable-sized metallic patches, to realize phase gradient. The superstrate assembly is placed at about half free space wavelength above the patch antenna resonating at 6.6 GHz. The antenna’s ground plane and PRS together construct the F-P cavity. A peak gain of 11.5 dBi is achieved at 13° tilt of the elevation plane. Wideband RCS reduction is achieved, spanning 5.6–16 GHz, for x- and y-polarizations of normally incident plane wave. The average RCS reduction is 13 dB. Simulation results with experimental verifications are presented.

scholarly journals Frequency scanning Fabry–Pérot cavity antenna with single 2D‐varying partial reflecting surface

2020 ◽  
Vol 14 (11) ◽  
pp. 1246-1252
Author(s):  
Junlin Zhan ◽  
Feng Xu ◽  
Shui Liu ◽  
Senshen Deng ◽  
Ling Yang ◽  
...  
Keyword(s):  
Frequency Scanning ◽  
Fabry Perot ◽  
Reflecting Surface

scholarly journals Imaging Spectroscopy on Very Large Telescopes

1984 ◽  
Vol 79 ◽  
pp. 515-517
Author(s):  
Paul Atherton
Keyword(s):  
Fourier Transform ◽  
Spatial Information ◽  
Broad Band ◽  
Imaging Spectroscopy ◽  
Wide Field ◽  
Two Dimensional ◽  
Imaging Spectrometer ◽  
Resolution Element ◽  
Fabry Perot ◽  
Large Telescopes

Imaging Spectroscopy is a technique in which a spectrum is obtained for each spatial resolution element across a wide field. The data is essentially 3-D, and may be viewed as a series of monochromatic images, or as a two dimensional array of spectra. A device generating such data may be called an imaging spectrometer. In a previous paper (Atherton, 1983 SPIE 445, 535) three different imaging spectrometers - based on grating, Fabry-Perot and Fourier Transform devices - were compared in terms of their ability to obtain spectral and spatial information over a wide field and broad band, to the same spectral resolution and S/N ratio, using the same detector array. From such a study it is clear that interferometer based devices are significantly faster than conventional grating spectrographs.

Weighted-phase-gradient-based quality maps for two-dimensional quality-guided phase unwrapping

2012 ◽  
Vol 50 (10) ◽  
pp. 1397-1404 ◽  
Author(s):  
Yuangang Lu ◽  
Wancheng Zhao ◽  
Xuping Zhang ◽  
Weihong Xu ◽  
Guoliang Xu
Keyword(s):  
Phase Unwrapping ◽  
Two Dimensional ◽  
Phase Gradient ◽  
Gradient Based ◽  
Quality Maps
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