A High-Efficiency Transmitarray Antenna Using Double Split Ring Slot Elements

Liu, Guang; Wang, Hongjian; Jiang, Jingshan; Xue, Fei; Yi, Min

doi:10.1109/lawp.2015.2409474

Cited by 114 publications

(48 citation statements)

References 8 publications

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“…The designed TA consists of a circular aperture with diameter D = 9.9λ0 = 104.4 mm. The F/D ratio is 0.5, with F being the focal distance, and the phase correction function is obtained as in [11]. This choice of dimensions responds to the objective of obtaining a minimum gain of 22 dBi in the ±30° angular range.…”

Section: Transparent Transmitarray Antenna Designmentioning

confidence: 99%

A Millimeter-Wave Multibeam Transparent Transmitarray Antenna at Ka-Band

Liu

Kodnoeih

Pham

et al. 2019

Antennas Wirel. Propag. Lett.

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This letter presents a transmitarray antenna (TA) in the 27.5-29.5 GHz frequency band. The proposed TA is optically transparent and offers the possibility of steering the beam in the H-plane from -30° to 30°. One can achieve these properties using a novel unit-cell, composed of meshed double-circle rings printed on polymethylmethacrylate (PMMA) substrates, a plastic material transparent to visible light. This unit-cell provides a phase-shift of 300° for an insertion loss lower than 1 dB at 28.5 GHz. In turn, the TA sources consist of 2×2-element arrays of aperture-coupled stacked patch antennas. The choice of a patch array over a horn array allows one to reduce the total profile and weight of the TA. We have fabricated and tested a transparent TA with a diameter of 9.9 wavelengths at 28.5 GHz, yielding a broadside gain of 25 dBi and -1 dB gain bandwidth of 1.8 GHz, off-axis 30° beam presents a peak gain of 21.5 dBi and -1 dB gain bandwidth of 1.4 GHz. The measured results are in good agreement with the simulated ones all over the frequency band of interest.Index Terms-transmitarray antennas, millimeter waves, multi-beam antenna, aperture-coupled stacked patch array, transparent antennas.

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Section: Transparent Transmitarray Antenna Designmentioning

confidence: 99%

A Millimeter-Wave Multibeam Transparent Transmitarray Antenna at Ka-Band

Liu

Kodnoeih

Pham

et al. 2019

Antennas Wirel. Propag. Lett.

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“…For transmission magnitude of higher than −3 dB, the vertically polarized element is able to produce a maximum phase range of 388 • ; whereas the horizontally polarized element is generating 382.89 • . Both curves are found to have linear phase response with an average phase sensitivity of 44.5 • /mm across the entire range of l 1 , which is not easily achievable by the conventional microstrip structures such as the slotted patch [19] and the Malta crosses with vias [20]. The electric field distributions around the long (l 1 = 20 mm) and short (l 2 = 12 mm) probes for the vertically polarized unit element are depicted in Figures 4(a) and (b), respectively.…”

Section: Transmitarray Unit Elementsmentioning

confidence: 91%

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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“…Terahertz unit element adopts four layers of double split rings slot configuration , as shown in Figure . The size parameters of the element were designed to work at 340 GHz.…”

Section: Element Structurementioning

confidence: 99%

“… Double split rings slot unit element (replotted from Ref. ): (a) shape of one layer and (b) four‐layer configuration of the unit cell. [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com]…”

Section: Element Structurementioning

confidence: 99%

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Terahertz substrateless transmitarray antenna design and microfabrication

Guang

Wang

Jiang

et al. 2016

Micro & Optical Tech Letters

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A terahertz substrateless transmitarray antenna using four layers of slot type elements is presented. Because the element contains no dielectric substrate, reflection loss on the surface of dielectric and transmission loss in the dielectric could be effectively avoided at terahertz band. A terahertz transmitarray antenna working at 340 GHz is designed and fabricated by photolithography technique and electroplating processes. DRIE process and wet anisotropic etching technique were used to remove the substrate. The measured directivity of the antenna prototype is 34.9 dB, and half power beam width (HPBW) of E‐plane and H‐plane are 3.3° and 3.4°, respectively. The measured sidelobe level is below −22 dB. The measured results show that good radiation characteristics are achieved by the proposed design and microfabrication processes. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2096–2100, 2016

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A High-Efficiency Transmitarray Antenna Using Double Split Ring Slot Elements

Cited by 114 publications

References 8 publications

A Millimeter-Wave Multibeam Transparent Transmitarray Antenna at Ka-Band

A Millimeter-Wave Multibeam Transparent Transmitarray Antenna at Ka-Band

L-Probe Transmitarrays for X-Band Mobile Communications

Terahertz substrateless transmitarray antenna design and microfabrication

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