Wideband Pattern-Reconfigurable Cone Antenna Employing Liquid-Metal Reflectors

Bai, Xia; Су, Минг; Liu, Yuanan; Wu, Yongle

doi:10.1109/lawp.2018.2823301

Cited by 44 publications

(12 citation statements)

References 14 publications

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“…In [17], three reconfigurable beams in elevation plane are achieved through varactor loaded parasitic strips. Liquid-metal reflector-based cone antenna with 21 unique beams is presented in [18]. The antenna have good performance in terms of impedance matching, bandwidth, and gain for all modes, however, the large and 3D dimensions make it unsuitable for planar and compact RF frontends.…”

Section: Introductionmentioning

confidence: 99%

Low‐profile dual‐band antenna with on‐demand beam switching capabilities

Iqbal

Bouazizi

Smida³

et al. 2019

IET Microwaves, Antennas & Propagation

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In this study, a dual‐band pattern‐reconfigurable monopole antenna is designed and experimentally validated for C‐band satellite communication systems and sensing UWB‐radar applications. The proposed antenna has three resonances at 3, 7 and, 8.5 GHz. To incorporate the reconfigurability, two switches are applied in the ground plane to reshape the radiation pattern and focus the radiated power in the desired direction. Thus, the desired beam from the antenna can be obtained by adjusting the states of the switches. The proposed antenna has good impedance matching (S11<−10thinmathspacedB for both operating bands), reasonable gain (>4.1 dBi), and high efficiency (>83%) for all switching states. A good agreement is observed between the simulated and measured results.

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Section: Introductionmentioning

confidence: 99%

Low‐profile dual‐band antenna with on‐demand beam switching capabilities

Iqbal

Bouazizi

Smida³

et al. 2019

IET Microwaves, Antennas & Propagation

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“…This cannot be realized in conventional solid metal antennas. Beam steering [13], frequency reconfigurable [18,36,37], and pattern reconfigurable [13,38] liquid metal antennas have been reported. Two liquid metal antenna examples are provided in Fig.…”

Section: Liquid Metal Antennasmentioning

confidence: 99%

Liquid Antennas: Past, Present and Future

Huang

Xing

Song

et al. 2021

IEEE Open J. Antennas Propag.

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The liquid antenna, as a new member of the antenna family, has drawn significant and increasing attention from both academia and industry due to its unique features. In this paper, a comprehensive review on this technology is presented which covers both metallic and non-metallic liquid antennas. Non-metallic liquid antennas are further divided into water-based and non-water-based liquid antennas. We first review and compare different liquid antennas and highlight the major developments in the past. Detailed discussions on state-of-the-art designs and current technical challenges are then presented, and finally the ways forward for the future are suggested. As a special feature, an in-depth review and discussion on materials for liquid antennas are provided which was not well covered in the literature in the past, important properties of selected materials are given in three comparison tables which can serve as antenna material selection references. It is shown that Galinstan is probably the best choice for metallic liquid antennas while ionic liquid materials are the preferred choice for dielectric liquid antennas. The challenges of making the liquid antenna for real-world applications are identified and discussed. It is believed that a liquid antenna implemented in radio systems is probably just around the corner.

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“…Beam switchable antenna has been widely concerned and studied due to its ability of directional radiation and beam tracking, which can expand the coverage of wireless signals while obtaining high gain. The existing beam-switchable antennas can be approximately summed up in four categories: (a) phased array antennas [1][2][3][4][5] ; (b) liquid metal antennas [6][7][8] ; (c) beam-switchable antennas based on AFSS (active frequency selective surface) [9][10][11][12][13] ; (d) parasitic antennas, such as pixel antennas [14][15][16] and electronically controlled quasi-Yagi array (ECQYA) antennas. [17][18][19][20][21][22] Although all the above methods can achieve beam steering, the ECQYA antennas have the advantages of low cost, pattern agility, and simple structure.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable dipole antenna array with shared parasitic elements for 360° beam steering

Chang

Chu

2020

Int J RF Microw Comput Aided Eng

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Different from the traditional reconfigurable antennas, in which PIN diodes are just used as switches, a novel method for achieving the reactance tuning is proposed, in which the impedance characteristics of the PIN diode in different working states are used to realize elements sharing. The mechanism of element sharing is explained by mathematical analysis, firstly. Then, the novel method of realizing element sharing based on the impedance characteristics of PIN diode is explained. By this way, reactance tuning can be easily achieved using PIN diode. Finally, a 360 beam switchable dipole antenna array is designed to illustrate the feasibility of the proposed method. The results show that gains of 7.8 dBi, and FBRs (front-to-back ratios) of greater than 19 dB are achieved by the proposed antenna. In particular, the maximum gain drop of the proposed antenna is less than 0.72 dB when switching between different working modes.

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Wideband Pattern-Reconfigurable Cone Antenna Employing Liquid-Metal Reflectors

Cited by 44 publications

References 14 publications

Low‐profile dual‐band antenna with on‐demand beam switching capabilities

Low‐profile dual‐band antenna with on‐demand beam switching capabilities

Liquid Antennas: Past, Present and Future

Reconfigurable dipole antenna array with shared parasitic elements for 360° beam steering

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