A Low Cross-Polarization Reflectarray Antenna Based on SIW Slot Antenna

Fan, Chong; Choi, Wai‐Wa; Yang, Wanchen; Che, Wenquan; Tam, Kam‐Weng

doi:10.1109/lawp.2016.2574888

Cited by 25 publications

(12 citation statements)

References 12 publications

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“…Furthermore, the multiresonance elements could feature low manufacture cost and low profile compared to the multilayer elements, which is more convenient for the real applications. Other techniques are also illustrated, such as the subwavelength elements, the phoenix‐elements, the metal‐only elements, the phase‐delay lines, the substrate integrated waveguide, and the fractal elements . However, the above‐mentioned antennas rarely feature single‐layer configuration or operate in a broad bandwidth at Ka‐band.…”

Section: Introductionmentioning

confidence: 99%

“…Other techniques are also illustrated, such as the subwavelength elements, the phoenix-elements, the metal-only elements, the phase-delay lines, the substrate integrated waveguide, and the fractal elements. [22][23][24][25][26][27][28][29][30][31] However, the above-mentioned antennas rarely feature single-layer configuration or operate in a broad bandwidth at Ka-band.…”

Section: Introductionmentioning

confidence: 99%

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A single‐layer Ka‐band broadband reflectarray antenna using log‐periodic elements

Zhao

Wang

et al. 2019

Micro & Optical Tech Letters

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This letter presents a novel log‐periodic reflectarray element based on a single‐layer substrate. To achieve a full 360° phase coverage with a gentle slope, the corresponding parameters are optimized. For the sake of minimizing the effects of the feed blockage, the proposed element is used to construct a Ka‐band offset‐fed reflectarray antenna whose aperture size is 81 mm × 81 mm. Moreover, a corresponding prototype is also fabricated to test the actual radiation performance. The measured maximum gain is 26.65 dB at the center frequency of 33 GHz with the aperture efficiency of 46.34%. Moreover, the measured peak sidelobe for E‐plane is lower than −17.87 dB and 10.69% of 1‐dB gain bandwidth is also achieved, which demonstrates that the proposed antenna features the characteristic of broadband. The simulated and measured results show that the proposed antenna features good radiation performance, which has the potential for 5G communication systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A single‐layer Ka‐band broadband reflectarray antenna using log‐periodic elements

Zhao

Wang

et al. 2019

Micro & Optical Tech Letters

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“…It is worth noting that the co-polarization radiation patterns have little asymmetric feature. Due to the center-feeding regime [ 53 , 54 ] of the proposed reflectarray, the CP feeding horn will inevitably interact with the reflected waves, causing distortion of the radiation pattern. Thus, we have to optimize the design parameters to maximally reduce the blockage effect of the feeding structure.…”

Section: High Gain Cp Graphene-based Reflectarraymentioning

confidence: 99%

Wide-Band Circularly Polarized ReflectarrayUsing Graphene-Based Pancharatnam-Berry Phase Unit-Cells for Terahertz Communication

et al. 2018

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A wide-band and high gain circularly polarized (CP) graphene-based reflectarray operating in the THz regime is proposed and theoretically investigated in this paper. The proposed reflectarray consists of a THz CP source and several graphene-based unit-cells. Taking advantages of the Pancharatnam Berry (PB) phase principle, the graphene-based unit-cell is capable of realizing a tunable phase range of 360° in a wide-band (1.4–1.7 THz) by unit-cell rotating, overcoming the restriction of intrinsic narrow-band resonance in graphene. Therefore, this graphene-based unit-cell exhibits superior bandwidth and phase tunability to its previous counterparts. To demonstrate this, a wide-band (1.4–1.7 THz) focusing metasurface based on the proposed unit-cell that exhibits excellent focusing effect was designed. Then, according to the reversibility of the optical path, a CP reflectarray was realized by placing a wide-band CP THz source at the focal point of the metasurface. Numerical simulation demonstrates that this reflectarray can achieve a stable high gain up to 15 dBic and an axial ratio around 2.1 dB over the 1.4–1.7 THz band. The good radiation performance of the proposed CP reflectarray, as demonstrated, underlines its suitability for the THz communication applications. Moreover, the design principle of this graphene-based reflectarray with a full 360° phase range tunable unit-cells provides a new pathway to design high-performance CP reflectarray in the THz regime.

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“…While this behavior leads to wide band operation [see Fig. 1 (c)], the main consequence of this small rejection is that the gain of RA antennas usually exhibits a smooth response versus frequency [18], [24]. As a result, these antennas cannot be applied in communication systems based on frequency-selectively channels or in sensitive defense/military applications.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Design of Reflectarray Antennas Based on Delay Lines: A Filter Perspective

et al. 2020

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The analysis and design of reflectarray (RA) antennas based in delay lines is introduced for the first time from a filter perspective. To this purpose, each unit-cell of the RA is considered as a network composed of two ports, one being the delay line and the other one the free-space. This approach allows to borrow the coupling matrix formalism from filter theory and apply it to design unit-cells exhibiting broadband operation together with very sharp frequency responses. The concept is demonstrated with the aid of planar printed unit-cells coupled to substrate integrated waveguides (SIWs) through slots, a configuration that offers significant advantages to shape its frequency response while providing relatively low loss. With the aim of validation, a third order filter structure integrated in SIW-based unit-cells has been experimentally tested using the waveguide simulator technique, at a center frequency of 9 GHz. Measurements demonstrate a high-quality linear phase variation and range, and large frequency selectivity together with broadband response for the element of about 18%. The experimental results show the feasibility of this approach for the design of broadband reflectarray antennas exhibiting sharp gain responses. To illustrate the concept, a medium size reflectarray has been theoretically designed using the proposed unit cell at 9 GHz, showing a directive beam with 35.8 dB gain, sharp gain selectivity over 18 dB, and confirms the wide band operation with 20.3% bandwidth for a 3 dB gain variation. INDEX TERMS Broadband antennas, delay-line elements, filter theory, gain selectivity, reflectarray antennas, substrate integrated waveguide.

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A Low Cross-Polarization Reflectarray Antenna Based on SIW Slot Antenna

Cited by 25 publications

References 12 publications

A single‐layer Ka‐band broadband reflectarray antenna using log‐periodic elements

A single‐layer Ka‐band broadband reflectarray antenna using log‐periodic elements

Wide-Band Circularly Polarized ReflectarrayUsing Graphene-Based Pancharatnam-Berry Phase Unit-Cells for Terahertz Communication

Analysis and Design of Reflectarray Antennas Based on Delay Lines: A Filter Perspective

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