Miniaturized-Element Offset-Feed Planar Reflector Antennas Based on Metasurfaces

Han, Yiping; Zhang, Jieqiu; Li, Yongfeng; Wang, Jiafu; Qu, Shaobo; Yuan, Hangying; Yu, Jianhua

doi:10.1109/lawp.2016.2572878

Cited by 29 publications

(13 citation statements)

References 18 publications

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“…After that, researchers have paid great attention to its huge potential in manipulating the amplitude, phase shift, and polarization modes of EM waves, [ 8–18 ] which aims to satisfy diversified requirements in practical application, such as microwave device, [ 19 ] stealth technology, [ 20 ] and antenna technology. [ 21,22 ]…”

Section: Introductionmentioning

confidence: 99%

Coding metasurface for diffusion‐like scattering in multiple directions based on Pancharatnam–Berry phase

Feng

Chen

et al. 2022

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Diffusion-like scattering along multiple directions based on coding metasurface (CM) is proposed for both mono-static and bi-static radar cross section (RCS) reduction in this work. Different from the previous CMs achieving diffusionlike scattering only in one direction, the proposed CMs can realize diffusion-like scattering along multiple directions via designing the phase spatial distributions of the consisted coding elements. The multiple diffusion-like scattering CMs were designed by using the co-polarization reflection resonators under circularly polarized wave incidence based on Pancharatnam-Berry (PB) phase. By elaborately arranging the phase spatial distribution of coding elements, two, three, and four beams of diffusion-like scattering were realized. The bi-static RCS reduction was improved with increasing number of the backward diffusion-like scattering beams. The measured results agree well with the simulations, and both demonstrated the excellent performance on mono-static and bi-static RCS reduction. Our strategy can help realize stealth applications under bi-static detections.

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Section: Introductionmentioning

confidence: 99%

Coding metasurface for diffusion‐like scattering in multiple directions based on Pancharatnam–Berry phase

Feng

Chen

et al. 2022

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“…In contrast, an inhomogeneous metasurface comprises unit cells with different geometries and predesigned sequences. This type of metasurface is suitable for wavefront control and shaping [6]- [17], providing applications of reflectarray [12] or transmitarray [13]. This technique is especially important for antenna engineering [14], [15], and the theory and design have been emerging into research fields [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Metasurface With Asymmetric Propagation of Electromagnetic Waves and Enhancements of Antenna Gain

et al. 2021

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An anisotropic metasurface that performs a reflectarray and transmitarray on each side is proposed. The proposed configuration comprises 15 × 15 unit cells that consist of polarization converters and a polarization filter. Two topologies are developed for the unit cells to meet five design goals simultaneously, including reflection magnitude, transmission magnitude, reflection phase difference, transmission phase difference, and polarization conversion ratio. By arranging the two topologies of unit cells according to a required phase distribution, in-phase reflection and transmission are achieved on each side. A prototype is designed, fabricated, and analyzed at 28.0 GHz. The feed is implemented as a quasi-Yagi antenna with gain of 8.0 dBi. When linearly-polarized electromagnetic waves impinge on the top, the proposed metasurface functions as a reflectarray and offers gain of 17.9 dBi. When the feed antenna illuminates the bottom, the proposed metasurface performs a transmitarray and depicts gain of 19.1 dBi. Moreover, when the both sides are arranged with feeds, a unidirectional pattern with power gain of 20.3 dBi is obtained. Such a "twin-feed mode" demonstrates a highly-directed main beam with orthogonal polarization components, which is useful in dual-polarized communications. Thus, the proposed metasurface provides antenna applications with low-cost, low-complexity, and multifunctional wavefront manipulation.INDEX TERMS Anisotropic, directive antennas, electromagnetic metamaterials, focusing, Yagi-Uda antennas.

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“…Based on the generalized laws of refraction and reflection [4,5], local modification of wave characteristics serves as the basis of manipulation. e passive metasurface has been designed for different applications ranging from optical wave to microwave, such as abnormal refraction and reflection [6,7], radar cross-section reduction [8][9][10], polarization conversion [11,12], beamsplitter [13], beam-focusing [14][15][16][17][18][19][20][21], and lens antennas [22][23][24][25][26][27][28][29][30][31][32][33]. e section thickness of the metasurface is small relative to its operating wavelength.…”

Section: Introductionmentioning

confidence: 99%

“…Using a Vivaldi antenna as the feeding antenna, the gain increase is 13.1 dB at 6.5 GHz and 13.8 dB at 10.5 GHz. On the other hand, an offset-fed planar reflector antenna based on R-type metasurface lens was designed [29]. Using a horn antenna for feeding, the metasurface-based planar reflector antenna shows a boresight gain similar to the traditional parabolic antenna with the same aperture at 10 GHz.…”

Section: Introductionmentioning

confidence: 99%

Metasurface-Based Cylindrical Lenses and Their Antenna Gain Enhancement

Shang

Zhou

Liao

2020

International Journal of Antennas and Propagation

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Electromagnetic metasurface lenses with the characteristic of being conformal to a cylindrical geometry are presented in this study. Based on the formulated principle of the cylindrical metasurface lens operating with transmission or reflection mode, the transmission or reflection phase gradient varying along the circumferential direction of a cylinder is implemented. A focused beam is observed at the objective focal point for each lens illuminated by a plane electromagnetic wave with transverse magnetic or transverse electric polarization. A coaxial-fed microstrip patch antenna element is used as a feeding of cylindrical metasurface lenses and positioned at their focal points, so as to evaluate their application in the enhancement of antenna gain along the boresight direction. By virtue of the focusing ability of presented lenses, effectively enhanced boresight gain from the cylindrical metasurface lens antennas are obtained, in comparison with the freestanding feeding antenna. The agreement between simulation and measurement validates the designs. Conformal integration or embedment of the electromagnetic lens into a certain platform skin with cylindrical characteristics is therefore potentially demonstrated, which implies an enhancement of boresight gain without obviously disturbing the local shape of the skin by apparent weight or drag.

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Miniaturized-Element Offset-Feed Planar Reflector Antennas Based on Metasurfaces

Cited by 29 publications

References 18 publications

Coding metasurface for diffusion‐like scattering in multiple directions based on Pancharatnam–Berry phase

Coding metasurface for diffusion‐like scattering in multiple directions based on Pancharatnam–Berry phase

Anisotropic Metasurface With Asymmetric Propagation of Electromagnetic Waves and Enhancements of Antenna Gain

Metasurface-Based Cylindrical Lenses and Their Antenna Gain Enhancement

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