Superdirective Wideband Array of Planar Monopole Antenna With Loading Plates

Mazinani, S. M.; Hassani, Hamid Reza

doi:10.1109/lawp.2010.2087411

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…Table III compares our proposed antenna with recent literature. The proposed antenna, compared with [6] - [10], demonstrates significant advancements. It operates at a higher frequency of 10 GHz, which corresponds to a wavelength of 30 mm, and maintains a compact element spacing of 9 mm (0.3λ), achieving a better directivity of 12.5 dB and a directivity enhancement of 66.7%.…”

Section: Design and Analysismentioning

confidence: 99%

Efficient Design of Super-Directive Antenna Array using Schelkunoff Method and Genetic Algorithm

Hamza,

Sheikh,

Attia

2024

Preprint

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Section: Design and Analysismentioning

confidence: 99%

Efficient Design of Super-Directive Antenna Array using Schelkunoff Method and Genetic Algorithm

Hamza,

Sheikh,

Attia

2024

Preprint

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“…For a wider frequency bandwidth, a two-element superdirective array composed of wideband planar plate monopoles is shown in Fig. 14(b), where a pair of small rectangular parallel plates is attached to the radiating edges of the monopole for further expanding the frequency band [81].…”

Section: Supergain/superdirective Beammentioning

confidence: 99%

A Comprehensive Survey on Transmitting Antenna Systems With Synthesized Beams for Microwave Wireless Power Transmission

Wagih

Goussetis

et al. 2023

IEEE J. Microw.

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In recent years, microwave wireless power transmission (MWPT) has emerged as a promising technology for supplying energy by receiving radiative power without wires and converting it into DC power. A high transmission efficiency is crucial for improving the performance of MWPT systems. To address the challenge of propagation loss, beam synthesis using transmitting antennas has gained significant attention, resulting in several synthesis methods becoming available, including whisper beams, flat-top beams, nondiffractive beams, supergain/superdirective beams, focused beams and adaptive beamforming technique such as time reversal methods. This comprehensive review covers these advanced beam synthesis techniques for MWPT transmitters and provides a detailed comparison of different synthesized beams. The article includes an in-depth discussion on current designs and existing technological challenges, as well as suggestions for future research directions. Although beam synthesis can substantially improve the transmission efficiency, the overall power transfer efficiency of the entire MWPT system still requires improvement as the performance, including impedance matching, is currently only considered at a component level and not at a system level. Furthermore, when using advanced beam synthesis techniques, the engineering and implementation challenges of high power (≥kW) and long-distance (≥km) MWPT become significant issues due to the high cost and large size involved. The review concludes that existing technologies for synthesized beams still require significant long-term efforts to meet the realistic engineering requirements for achieving highly efficient MWPT systems. The joint utilization of beam synthesis techniques and comprehensive system matching/optimization is identified as a research direction with the potential to realize highly efficient MWPT systems, offering foreseeable impacts in both terrestrial and space-based MWPT applications. This review serves as a solid foundation for the design of transmitter antennas in long-distance, high-power MWPT systems, and furthermore provides novel insights for future designs of highly efficient MWPT systems.INDEX TERMS Beam synthesis technology, rectennas, wireless power transfer, flattop beam, non-diffractive beam, supergain/superdirective beam, focused beam, time reversal, adaptive beamforming technique.

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“…Considering the parasitic effect of the lumped element, the proposed antenna array maintains good performance at low-frequency bands. In [ 23 ], a wideband superdirective antenna array using plate monopoles was designed for a wide frequency bandwidth (FBW = 83.02%). However, the external power divider with a phase shifter is not discussed.…”

Section: Introductionmentioning

confidence: 99%

Superdirective Wideband Array of Circular Monopoles with Loaded Patches for Wireless Communications

Lu,

Liu,

Lei

et al. 2023

Sensors

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A wideband superdirective array, composed of a two-element circular monopole configuration, is introduced. The monopoles are placed in close proximity, facing each other on a metal ground. To ensure good matching at high frequencies, two pairs of elliptical patches are added to the sides of the monopoles, enhancing the surface current of the circular patch for wideband performance. To achieve equal amplitude excitation and the desired phase difference, a wideband power divider with a phase shifter is designed to feed the antenna array. Simulation and measurement results demonstrate that the proposed wideband antenna array, operating within the frequency range of 2.94–7.93 GHz, exhibits a maximum directivity of 8.36–10 dBi, with an antenna efficiency ranging from 47.86 to 83.18% across the bandwidth. The proposed array has the advantages of miniaturization, high directivity and wideband operation and can be widely used in various portable wireless communication systems, including WLAN (5.05–5.9 GHz), ISM (5.725–5.875 GHz), 5G communication (3.3–3.8 GHz), etc.

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Superdirective Wideband Array of Planar Monopole Antenna With Loading Plates

Cited by 7 publications

References 11 publications

Efficient Design of Super-Directive Antenna Array using Schelkunoff Method and Genetic Algorithm

Efficient Design of Super-Directive Antenna Array using Schelkunoff Method and Genetic Algorithm

A Comprehensive Survey on Transmitting Antenna Systems With Synthesized Beams for Microwave Wireless Power Transmission

Superdirective Wideband Array of Circular Monopoles with Loaded Patches for Wireless Communications

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