Transmitarray Antenna Design Using Cross-Slot Elements With No Dielectric Substrate

Abdelrahman, Ahmed H.; Elsherbeni, Atef Z.; Yang, Fan

doi:10.1109/lawp.2014.2298851

Cited by 157 publications

(82 citation statements)

References 13 publications

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“…Table 1 compares the performances of the proposed transmitarrays with some of the recently published works. Referring to the table, the conducting layers of the transmitarrays in [8,[22][23][24] are separated by an air gap which is dependent on the operating frequency. When designed at 7. in [8,[22][23][24], while maintaining a low phase sensitivity.…”

Section: Full Transmitarraysmentioning

confidence: 99%

L-Probe Transmitarrays for X-Band Mobile Communications

Ng¹,

Lee²,

Lim³

2017

PIER B

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Abstract-Two novel wire transmitarrays, which are designed using a pair of co-joined L-shaped probes, have been developed for X-band mobile communications. By adjusting the orientation of the L probes, the polarization of the transmitting wave can be easily made either vertical or horizontal. Floquet method has been used for characterizing the transmission responses, and both transmitarray unit cells are found to have achieved a phase range of greater than 380 • and a linear phase sensitivity of 44.5 • /mm. Wide −1 dB gain bandwidth larger than 10% is achievable in both the vertically and horizontally polarized full-fledged transmitarrays, with radiation efficiency of ∼ 90%. The proposed transmitarrays have low radar cross section, which can be used for military applications.

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Section: Full Transmitarraysmentioning

confidence: 99%

L-Probe Transmitarrays for X-Band Mobile Communications

Ng¹,

Lee²,

Lim³

2017

PIER B

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“…Due to the planar array of printed patch elements, the transmitarray avoids the fabrication complexity inherent in lens antenna. Furthermore, the feed can be placed directly in front of the aperture without incurring the blockage losses of a reflectarray configuration, which usually results in high aperture efficiency [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the design process must involve both the transmission phase shift and magnitude of the element. In addition, the severe drawback of the microstrip transmitarray is its limited bandwidth performance, which is usually 7% or less, and intense efforts have been made in recent years to overcome this shortcoming [1,4,5,7] and [8]. In this paper, we present a novel transmitarray operating at 9.5 GHz which uses a double-petal loop as the unit cell element and offers a wider bandwidth than previously achieved ones.…”

Section: Introductionmentioning

confidence: 99%

“…One approach involves using multilayer frequency selective surfaces [1,5,6] and [9]. This approach is popularly used to control the transmission magnitude and phase of each element in the array individually by varying the element dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…The measured gain of the transmitarray prototype is 22.15 dBi at 9.5 GHz, and the aperture efficiency is 31%. The measured 1-dB gain bandwidth is 10.2%, which is considered broadband performance compared with the published designs in [1,[4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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A Wideband Transmitarray Using Double-Petal Loop Elements

Tian¹,

Jiao²,

Zhao³

2016

PIER Letters

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Abstract-In this letter, a four-layer transmitarray operating at 9.5 GHz is designed using a doublepetal loop element as the unit cell. A configuration of the double-petal loop elements is used to increase transmission phase variation while maintaining a wide transmission magnitude bandwidth of the unit cell, and a full transmission phase range of 360 • is achieved for a transmission magnitude equals to or better than −2.4 dB. Furthermore, the oblique performance of the unit cell is also good. Then, a primefocus 676-element microstrip transmitarray with the proposed element is fabricated and measured. The highest measured gain is about 22.15 dBi at 9.8 GHz, resulting in a 31% aperture efficiency. The antenna bandwidth of 10.2% (from 9.3 to 10.3 GHz) for 1-dB gain is achieved in this design.

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Advances in Transmitarray Antennas

Feng

Xiao

2020

Wiley Encyclopedia of Electrical and Electronics Engineering

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Recent advances in the art of transmitarray antenna (TAA) designs are summarized in this article, mainly focusing on the TAA element designs, improved feeding mechanisms, methods of designing wideband and ultra‐wideband TAAs, and TAAs for beam‐steering applications. Firstly, according to the diverse‐phase shifting mechanisms, representative TAA elements in the available literatures are categorized into four groups, including the receiving–transmitting elements, multilayer frequency‐selective surface‐type elements, polarization‐conversion elements, and phase‐rotation elements. Based on their own specific properties, designers can flexibly select the proper elements for different application scenarios. Moreover, primarily aiming at reducing the overall profile, some improved feeding mechanisms are discussed, for example, the folded TAA, TAA with the feeds of the multihorn configuration, the auxiliary small TAA, the integrated leaky‐wave antenna, the Cassegrain reflectarray, or a small‐scale array antenna. Subsequently, numerous typical solutions to improve the inherently narrow bandwidths of the TAAs are also presented. It can be concluded that the wideband performances of the non‐true‐time‐delay TAA are realized by optimizing the element‐phase errors and transmission losses at all designing frequencies. If the true‐time‐delay elements are employed, the key point is utilizing their group delays to appropriately compensate the spatial phase delays. Finally, for highly demanded beam‐steering applications, the TAAs incorporated with the techniques of reconfigurable, mechanical scan, switched beam, or phased array antenna (PAA) feed are introduced. Specifically, representative designs of the PAA‐fed TAAs are presented in detail, which will be a promising technical candidate of high‐gain beam scanning antennas.

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Transmitarray Antenna Design Using Cross-Slot Elements With No Dielectric Substrate

Cited by 157 publications

References 13 publications

L-Probe Transmitarrays for X-Band Mobile Communications

L-Probe Transmitarrays for X-Band Mobile Communications

A Wideband Transmitarray Using Double-Petal Loop Elements

Advances in Transmitarray Antennas

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