High-Gain Dual-Band Transmitarray

Wu, Rui Yuan; Li, Yun Bo; Wu, Wei; Shi, Chuan; Cui, Tie Jun

doi:10.1109/tap.2017.2705074

Cited by 94 publications

(34 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several publications illustrate this trend and have validated such concepts in X-band [1]- [2] and Ku-band [3]- [4]. Our objective is to demonstrate a low-cost transmitarray for ground terminals operating in the Satcom downlink K-band (17.7 -21.2 GHz).…”

Section: Introductionmentioning

confidence: 92%

Metal-Only Transmitarray Based on C-Shaped Slot

Pham¹,

Sauleau²,

Fourn³

et al. 2018

2018 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

View full text Add to dashboard Cite

This paper presents a novel design of metal-only transmitarray using unit-cells based on C-shaped slots. The unitcell consists of four identical layers separated by a quarterwavelength spacer at 20 GHz (3.75 mm). The phase variation reaches 360° by varying the inner radius of the slot. An example of linearly-polarized transmitarray is provided to validate this concept at K-band for satellite communications in the down-link band.

show abstract

Section: Introductionmentioning

confidence: 92%

Metal-Only Transmitarray Based on C-Shaped Slot

Pham¹,

Sauleau²,

Fourn³

et al. 2018

2018 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

View full text Add to dashboard Cite

show abstract

“…Therefore, the slot length can be utilized to control the transmitted amplitude. This concept was also exploited in another study, [ 40 ] in which a dual‐band transmitarray was realized by etching several slots of different lengths. Specifically, it was shown that the slot layer acts as a frequency‐selective structure, in which the operational frequency can be tuned by acting on the slot length.…”

Section: Figurementioning

confidence: 99%

Independent Control of Copolarized Amplitude and Phase Responses via Anisotropic Metasurfaces

Bao

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

A class of anisotropic, transmissive electromagnetic metasurfaces is presented, which enable independent and simultaneous control of copolarized phase and amplitude responses to two linear, orthogonal polarizations. By varying the geometrical parameters, the transmission response of the proposed structure can yield a full phase coverage, accompanied by broadly adjustable amplitude and negligible cross‐polarized components. The full amplitude‐phase control together with the novel anisotropic character allows efficient implementation of complicated field manipulations. As representative application examples, which cannot be realized via conventional (phase‐only) metasurfaces, it is presented here: (1) the radiation of multiple equal‐power vortex beams (along arbitrarily predesigned directions, with designable orbital angular momentum modes under different polarizations), and (2) the realization of polarization‐reconfigurable multifocal metalenses. Full‐wave numerical simulations and experimental results demonstrate good agreement and confirm the versatility and effectiveness of the proposed approach to design advanced field‐manipulation systems.

show abstract

“…[ 31 ] Although the FP cavity is a narrow‐band structure, its bandwidth can be increased by cascading PRS using multi‐resonance units. [ 35,36 ] In addition, it can also be overcome by designing broadband feed with only one single layer of PRS. Up to now, according to the optical ray model, a majority of FP structures has been carried out, but limited to 1D applications because of the complex formulations, even for those considering the transmission phase of PRS.…”

Section: Introductionmentioning

confidence: 99%

Low‐Profile Electromagnetic Holography by Using Coding Fabry–Perot Type Metasurface with In‐Plane Feeding

Shen

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

this technology, the spatial resolution and imaging efficiency of the metasurface holograms are significantly improved, compared with the conventional geometrical optical structures suffering high-noise and low-reliability properties. Accordingly, some new achievements such as the polarization-independent, multi-color, non-linear, and high-efficiency holograms have been implemented with much more convenience under the metasurface-based technologies. [10][11][12][13][14][15][16] Digital coding metasurfaces have attracted much attention in recent years, which build up a bridge for the physical world and the digital information world. [17,18] The phase or amplitude response of the digital units are always encoded as N-bit with adjustment of some meta-unit parameters. For example, for a coding unit of transmission-type metaunit, the transmission phases of 0° and 180° refer to be digital bits "0" and "1", which bring great innovation for traditional designs. We can directly realize the transmission, reception, and processing of information in the microwave fields without considering the base-band digital modulation and processing, which greatly simplifies the design of the conventional transmitters and receivers. In addition, new wireless communication systems and advanced imaging systems have also been developed using this technology with good performance. [19][20][21] On this basis, adding active elements such as PIN diodes, varactors, and micro-electro-mechanical systems (MEMS) into the digital meta-unit, [22][23][24][25] the programmable metasurfaces can be realized through a field programmable gate array (FPGA). Electromagnetic reprogrammable coding metasurface holograms have been completed by using 1-bit reflection-type metasurface. [26] However, in the actual implementations of the conventional metasurface holography and the programmable digital-coding metasurface holography, the position of the feeding source is always placed far from the metasurfaces, which greatly increases the profile of metasurfaces and emerges unwanted blockage under the reflection-type designs. [27] Nowadays, the folded reflectarray, as an improved form of Cassegrain reflectarray, has also received much attention. [28][29][30] Although this structure reduces the profile and overcomes the shielding effect of the reflection-type metasurfaces, it brings some challenges in designing the feed and the rotation of polarization. [28][29][30] The introduction of Fabry-Perot (FP) cavity will pave a way to solve these problems. Compared with the folded reflectarray, Metasurface holography has been well studied due to its features that are superior to the traditional holographic technologies. However, high profiles of the reflection-and transmission-type configurations in the metasurface holography restrict its applications. On the other hand, digital coding metasurfaces have received great attention recently because they build a link between the information theory and surface electromagnetic fields, which also bring new viewpoint and convenience fo...

show abstract

High-Gain Dual-Band Transmitarray

Cited by 94 publications

References 24 publications

Metal-Only Transmitarray Based on C-Shaped Slot

Metal-Only Transmitarray Based on C-Shaped Slot

Independent Control of Copolarized Amplitude and Phase Responses via Anisotropic Metasurfaces

Low‐Profile Electromagnetic Holography by Using Coding Fabry–Perot Type Metasurface with In‐Plane Feeding

Contact Info

Product

Resources

About