An Efficiency-Improved Tightly Coupled Dipole Reflectarray Antenna Using Variant-Coupling-Capacitance Method

Wang, Jiayou; Zhou, Yonggang; Gao, Steven; Luo, Qi

doi:10.1109/access.2020.2973574

Cited by 13 publications

(13 citation statements)

References 16 publications

(21 reference statements)

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“…The work of tightly coupled RAs was extended recently by Wang et. al in 2020 [107]. As depicted in Fig.…”

Section: Figure 26 Dual Layer Unit Cell Based On Stacked Rectangular ...mentioning

confidence: 95%

“…28 (b), an RA with improved aperture efficiency is achieved by utilizing the variant-coupling capacitance and true time delay line methods. The element is based on an elliptical printed dipole and in the case of [107] overlapping of the adjacent elements is allowed which is explained as variant coupling capacitance. Therefore, the coupling capacitance along with the length of the time delay lines are taken into consideration when designing the unit cell that achieves a reflection phase range of approximately 500°…”

Section: Figure 26 Dual Layer Unit Cell Based On Stacked Rectangular ...mentioning

confidence: 99%

“…However, it is important to note that the subwavelength periodicity is the most flexible approach as it can be easily integrated with other approaches such as the element rotation, the multi resonance or phase delay lines to yield superior gain bandwidth characteristics as it will be discussed in subsection F. In this approach the majority of the designs operate in X-band [73], [93], [96], [97], [98], [99], [101], [102]. There are one K-band designs [104], three Kuband wideband RAs [95,108], [100], one dual band RA at X/K-band [70] and two Ka-band designs [92], [94] while there are two tightly coupled RAs that operate in C-band and Xband, e.g., [107] and [105]. Different lattice periodicity can be observed from Table II such as 𝜆/3, 𝜆/4, 𝜆/5 and 𝜆/6.…”

Section: E Subwavelength Periodicity Approach Evaluationmentioning

confidence: 99%

“…The tightly coupled RAs of [107] and [105] are evaluated in terms of their -10dB impedance bandwidth rather than the gain-bandwidth. Both designs are based on tightly coupled printed vertically arranged dipoles.…”

Section: E Subwavelength Periodicity Approach Evaluationmentioning

confidence: 99%

See 3 more Smart Citations

Wideband Reflectarrays for 5G/6G: A Survey

Theoharis

Raad

Tubbal

et al. 2022

IEEE Open J. Antennas Propag.

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“…The work of tightly coupled RAs was extended recently by Wang et. al in 2020 [107]. As depicted in Fig.…”

Section: Figure 26 Dual Layer Unit Cell Based On Stacked Rectangular ...mentioning

confidence: 95%

Section: Figure 26 Dual Layer Unit Cell Based On Stacked Rectangular ...mentioning

confidence: 99%

Section: E Subwavelength Periodicity Approach Evaluationmentioning

confidence: 99%

Section: E Subwavelength Periodicity Approach Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

Wideband Reflectarrays for 5G/6G: A Survey

Theoharis

Raad

Tubbal

et al. 2022

IEEE Open J. Antennas Propag.

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show abstract

“…The main drawback of reconfigurable reflectarrays is their limited gain bandwidth which can be lower than 4%. Hence, an interesting combination that can be explored in future CubeSat implementations is the concept of tightly coupled reflectarray antennas [93]. Finally, the antenna will be a critical design aspect of future CubeSat missions.…”

Section: B Future Trendsmentioning

confidence: 99%

Antenna Designs for CubeSats: A Review

et al. 2021

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Cube Satellites, aka CubeSats, are a class of nano satellites that have gained popularity recently, especially for those that consider CubeSats as an emerging alternative to conventional satellites for space programs. This is because they are cost-effective, and they can be built using commercial off-theshelf components. Moreover, CubeSats can communicate with each other in space and ground stations to carry out many functions such as remote sensing (e.g., land imaging, education), space research, wide area measurements and deep space communications. Consequently, communications between CubeSats and ground stations is critical. Any antenna design for a CubeSat needs to meet size and weight restrictions while yielding good antenna radiation performance. To date, a limited number of works have surveyed, compared and categorised the proposed antenna designs for CubeSats based on their operating frequency bands. To this end, this paper contributes to the literature by focusing on different antenna types with different operating frequency bands that are proposed for CubeSat applications. This paper reviews 48 antenna designs, which include 18 patch antennas, 5 slot antennas, 4 dipole and monopole antennas, 3 reflector antennas, 3 reflectarray antennas, 5 helical antennas, 2 metasurface antennas and 3 millimeter and sub-millimeter wave antennas. The current CubeSat antenna design challenges and design techniques to address these challenges are discussed. In addition, we classify these antennas according to their operating frequency bands, e.g., VHF, UHF, L, S, C, X, Ku, K/Ka, W and mm/sub-mm wave bands and provide an extensive qualitative comparison in terms of their size, -10 dB bandwidths, gains, reflection coefficients, and deployability. The suitability of different antenna types for different applications as well as the future trends for CubeSat antennas are also presented.

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A two-dimensional grating surface made of quaternary Huygens elements excited by a real source

Derafshi

Komjani

Mizuji

2023

Sci Rep

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In this article, a new method to create an anomalous reflection in the desired direction is proposed. Two-dimensional grating surfaces consisting of four particles with the properties of a Huygens source are employed in each period. Then, this method is extended to the problem in which the grating surface is illuminated by a real source such as a horn. In this case, the designed grating surface has different periods in both directions to collimate the reflected wave and give an in-phase wavefront. Using our method, a high-efficiency reflectarray (RA) based on quaternary Huygens grating is designed. This RA is distinguished from common RAs due to its beam squint capability. This array offers more aperture efficiency and thus more gain in comparison to the leaky waves that inherently have low aperture efficiency. Therefore, our designed RA can compete with leaky wave antennas in many applications. The mentioned RA is designed to have the main beam in the direction of $$\left( {{\theta _0} = {{68}^{\circ }},{\varphi _0} = {{225}^{\circ }}} \right)$$ θ 0 = 68 ∘ , φ 0 = 225 ∘ , at the frequency of 12 GHz. The simulation results show the realized gain and SLL of this antenna are 24.8 dB and $$-15.5$$ - 15.5 dB, respectively. Also, by changing the frequency in the range of 12–15 GHz, the direction of the main beam varies from $$\left( {{{68}^{\circ }}, {{225}^{\circ }}} \right)$$ 68 ∘ , 225 ∘ to $$\left( {{{39}^{\circ }}, {{225}^{\circ }}} \right)$$ 39 ∘ , 225 ∘ .

show abstract

An Efficiency-Improved Tightly Coupled Dipole Reflectarray Antenna Using Variant-Coupling-Capacitance Method

Cited by 13 publications

References 16 publications

Wideband Reflectarrays for 5G/6G: A Survey

Wideband Reflectarrays for 5G/6G: A Survey

Antenna Designs for CubeSats: A Review

A two-dimensional grating surface made of quaternary Huygens elements excited by a real source

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