A wideband frequency reconfigurable antenna with improved gain

Sheng, Lili; Meng, Liang; Lin, Yixiang; Gong, Yanping; Yang, Xiaohui; Cao, Weihua

doi:10.1002/mop.33577

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Table I compares the beam-steering capabilities of the proposed RRA to other existing works published in literature on 1-bit RRA based on PIN diodes. The beam-steering range of the proposed RRA is ±60°, which is similar to [10,23], but wider than [5,6,22,25]. The proposed RRA has an average SSL below −10 dB at the broadside for both orthogonal polarizations in both planes, which corresponds closely to the performance reported in previous studies [5, 6, 10-12, 22, 25].…”

Section: Simulation and Experimental Resultssupporting

confidence: 82%

“…Switching the PIN diodes on or off with different DC voltages can achieve a 180° reflection phase change, making them suitable for 1-bit programmable RRA. Programmable controllers such as field-programmable gate arrays (FPGAs) [10,21] and microcontroller units (MCUs) [5,6,12,13,22,23] are used to achieve programmability in RRA. These controllers not only respond to external stimuli, but also bridge EM characteristics and digital information systems, enabling communication and coordination between the physical world and the digital domain.…”

Section: Introductionmentioning

confidence: 99%

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A Metasurface-Based Electronically Reconfigurable and Dual-Polarized Reflectarray Antenna for Beam-Steering Applications

Sangmahamad,

Janpugdee,

Zhao

2023

IEEE Access

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In this work, a metasurface-based, 1-bit electronically reconfigurable reflectarray antenna (RRA) is proposed for dual-polarization beam-steering applications. The proposed RRA consists of 16 × 16 Jerusalem cross-shaped unit cells loaded with PIN diodes, which are used as active and reconfigurable devices to generate a reflection phase difference of 180° between their on-and off-states. An optimal focal length to diameter ratio (𝑓/𝐷) for the feed antenna is determined to maximize its radiation coverage on the RRA. Microcontroller-based shift registers are used to resolve the complexity of the individual DC bias networks for the PIN diodes. The proposed RRA is designed, fabricated, and measured to evaluate its beam-steering performance. The measurement results show that the proposed RRA can achieve beam-steering of ±60° for x-and y-polarizations in both azimuth and elevation planes. Moreover, the proposed RRA is further verified by full-wave simulations to evaluate its additional functions, such as the generation of sum and difference beams for monopulse radar systems. The proposed RRA is anticipated to have significant potential in areas such as wireless communications, imaging, and radar systems, and is a particularly suitable candidate for reconfigurable intelligent surfaces (RISs) due to its adaptability and capability of dynamically generating different radiation patterns.INDEX TERMS, Reconfigurable reflectarray antenna, reflective metasurface, beam-steering, PIN diode.

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Section: Simulation and Experimental Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

A Metasurface-Based Electronically Reconfigurable and Dual-Polarized Reflectarray Antenna for Beam-Steering Applications

Sangmahamad,

Janpugdee,

Zhao

2023

IEEE Access

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A Gain‐Enhanced Multiband Frequency and Pattern Reconfigurable Antenna for Wi‐Fi 6E and 5G New Radio Wireless Standards

Ganesh,

Raghava,

Sabapathy

et al. 2024

Int J Communication

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In this paper, a multiband hybrid reconfigurable antenna with enhanced gain is reported to support Wi‐Fi 6E, indoor WLAN, and 5G new radio (NR) wireless standards. The reported structure consists of a half‐hexagonal‐shaped radiating element along with two symmetrical rectangular single‐split resonators interconnected via two PIN diodes to achieve multiband frequency and pattern reconfigurability of the proposed antenna and a single‐layer frequency selective surface (FSS) to enhance the gain. By configuring these PIN diodes in three distinct modes, the reported antenna allows for independent reconfigurability to support multipurpose sub‐6GHz and Wi‐Fi 6E (3.3, 3.5, 5.1, 5.3, and 6.5 GHz) wireless standards, respectively. The results also showed that the antenna is capable of maintaining a frequency of 6.5 GHz in all modes while reconfiguring its radiation pattern in three different directions, namely, 265°, 13°, and 337° on the xz plane. The gain of the proposed hybrid reconfigurable antenna is enhanced by an FSS‐based reflector placed below the radiating structure at a distance of to the lowest operating frequency (3.3 GHz), and the gain is enhanced by 2–4 dBi as compared without FSS. The reported hybrid reconfigurable antenna is implemented on an FR‐4 substrate with a depth of 1.6 mm and a relative permittivity of 4.4. For validation of the proposed structure, the experimental results are compared with the simulated results.

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Gain enhancement in octagonal shaped frequency reconfigurable antenna using metasurface superstrate

Kandasamy,

Kaliappan,

Shanmugam

et al. 2024

Frequenz

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A novel, high-gain reconfigurable antenna with a metasurface (MS) superstrate-based configuration is proposed in this research article. The design utilizes a concentric octagonal-shaped patch as a base antenna. Four SMP1345-079LF PIN diode switches are incorporated in the base antenna to facilitate frequency reconfiguration. When all four of the diodes are in OFF condition, the designed antenna resonates at 5.8 GHz. Switching ON the diodes switches the resonating frequency to 5 GHz. A novel MS unit cell of shape like ‘8’ has been designed and analyzed. The designed unit cell exhibits properties of the metamaterial in the operating frequencies. An MS superstrate of a 5 × 5 array has been designed and connected to the base antenna through Teflon rods. Further, the proposed reconfigurable antenna with MS has been analyzed for air and foam medium (medium between antenna and superstrate). The proposed structure offers better performance for the air medium with a gain enhancement of 4.23 dBi and 1.55 dBi at 5 GHz and 5.8 GHz respectively. Fabrication and testing processes are undertaken to validate the proposed antenna’s performance.

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A wideband frequency reconfigurable antenna with improved gain

Cited by 3 publications

References 10 publications

A Metasurface-Based Electronically Reconfigurable and Dual-Polarized Reflectarray Antenna for Beam-Steering Applications

A Metasurface-Based Electronically Reconfigurable and Dual-Polarized Reflectarray Antenna for Beam-Steering Applications

A Gain‐Enhanced Multiband Frequency and Pattern Reconfigurable Antenna for Wi‐Fi 6E and 5G New Radio Wireless Standards

Gain enhancement in octagonal shaped frequency reconfigurable antenna using metasurface superstrate

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