Dual‐band circular‐polarization reconfigurable liquid dielectric resonator antenna

Liu, Sui‐Bin; Zhang, Fu‐Shun; Zhang, Yi‐Xuan

doi:10.1002/mmce.21613

Cited by 9 publications

(13 citation statements)

References 16 publications

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“…The final application example is the multi‐resonant liquid antennas with distinctive characteristics . Dual‐resonant wideband characteristic can be realized by the hybrid DRA mode and dielectric‐loaded slot (DLS) mode .…”

Section: Applications and Discussionmentioning

confidence: 99%

“…can be implemented. More recently, a 3‐D printed liquid DRA with dual‐resonant, CP reconfigurability is presented . By incorporating novel materials and advanced fabrication technologies, more degrees of freedom in design can be flexibly introduced to implement diverse functionality.…”

Section: Applications and Discussionmentioning

confidence: 99%

“…In addition, the multiple resonant modes within one radiator can be independently excited and tuned, so the radiation patterns of elementary antennas can be effectively controlled by optimizing the combination of the excited resonant modes within a single radiator. This may also lead to more novel antenna designs with distinctive characteristics, such as radiation‐steering or polarization‐agile reconfigurabilities . Due to these attractive merits, the multi‐resonant antenna design approaches are expected to get widespread applications in future antenna developments.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

On the multi‐resonant antennas: Theory, history, and new development

2019

Int J RF Microw Comput Aided Eng

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A survey of multi‐resonant antennas is comprehensively presented, with emphasis on theoretical framework, design approaches, and practical examples. This article begins with a brief history of the multi‐resonant dipole theory, and then concentrates on the design approaches that have been developed to typical, basic antenna elements, for example, electric dipole antenna, slotline antenna, loop antenna, complementary dipole antenna, and microstrip patch antenna. Design examples for different practical applications are then raised. In final, the multi‐resonant antenna design approach is summarized and compared to some relevant antenna design techniques.

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Section: Applications and Discussionmentioning

confidence: 99%

Section: Applications and Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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On the multi‐resonant antennas: Theory, history, and new development

2019

Int J RF Microw Comput Aided Eng

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“…The antenna operates in the range 2.31-2.72 GHz with the radiation efficiency of >70%. In Reference [65], another compartment geometry was proposed for switching between the RHCP and the LHCP. Measurement results showed that this antennas can achieve a CP reconfigurability in dual band 1.55-1.72 GHz and 2.29-2.52 GHz with wide bandwidths of 10.4% and 9.7%, respectively.…”

Section: Antenna Geometry Variationsmentioning

confidence: 99%

A Review on Reconfigurable Liquid Dielectric Antennas

Motovilova

Huang

2020

Materials

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The advancements in wireless communication impose a growing range of demands on the antennas performance, requiring multiple functionalities to be present in a single device. To satisfy these different application needs within a limited space, reconfigurable antennas are often used which are able to switch between a number of states, providing multiple functions using a single antenna. Electronic switching components, such as PIN diodes, radio-frequency micromechanical systems (RF-MEMS), and varactors, are typically used to achieve antenna reconfiguration. However, some of these approaches have certain limitations, such as narrow bandwidth, complex biasing circuitry, and high activation voltages. In recent years, an alternative approach using liquid dielectric materials for antenna reconfiguration has drawn significant attention. The intrinsic conformability of liquid dielectric materials allows us to realize antennas with desired reconfigurations with different physical constraints while maintaining high radiation efficiency. The purpose of this review is to summarize different approaches proposed in the literature for the liquid dielectric reconfigurable antennas. It facilitates the understanding of the advantages and limitations of this technology, and it helps to draw general design principals for the development of reconfigurable antennas in this category.

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“…In antenna design, the available fluidic antenna materials can generally be classified into non-conductive, partially conductive, and conductive fluids. Non-conductive fluids include de-ionized (DI) water [8,9], ethyl acetate [10,11], acetone [12], and various oils such as mineral/transformer oil [13,14], which are used in dielectric resonator antennas (DRA). Partially conductive fluids like seawater [15,16] are also available and typically used in fabricating antennas for maritime applications, while solute concentrations in electrolytic solutions [17] can be used to fine-tune antenna performance.…”

Section: Materials In Liquid Metal Antennasmentioning

confidence: 99%

Liquid Metal Antennas: Materials, Fabrication and Applications

Paracha

Butt

Alghamdi

et al. 2019

Sensors

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This work reviews design aspects of liquid metal antennas and their corresponding applications. In the age of modern wireless communication technologies, adaptability and versatility have become highly attractive features of any communication device. Compared to traditional conductors like copper, the flow property and lack of elasticity limit of conductive fluids, makes them an ideal alternative for applications demanding mechanically flexible antennas. These fluidic properties also allow innovative antenna fabrication techniques like 3D printing, injecting, or spraying the conductive fluid on rigid/flexible substrates. Such fluids can also be easily manipulated to implement reconfigurability in liquid antennas using methods like micro pumping or electrochemically controlled capillary action as compared to traditional approaches like high-frequency switching. In this work, we discuss attributes of widely used conductive fluids, their novel patterning/fabrication techniques, and their corresponding state-of-the-art applications.Most of the conventional antennas are fabricated by etching the copper cladding on the rigid substrates to form static conductor shapes. Such antennas are highly efficient but suffer from irreversible structure deformation and even damage when being bent or stretched beyond certain limits [3]. As alternatives, several types of copper-coated polymer substrates such as Kapton, polyethylene terephthalate (PET), and polyethylene naphthalate (PEN) films have been investigated to accommodate the need in flexible applications such as antennas. Similar to conventional substrates, the electrical properties of these substrates also degrade after severe bending/stretching, which in turn reduces antenna efficiency. Another option is polymer-based materials such as polydimethylsiloxane (PDMS), which has been typically used in combination with copper foils to realize highly flexible antennas. However, the semi-rigid copper foils may potentially suffer from irreversible deformation after certain bending cycles. Alternatively, liquid metals can be injected into microfluidic channels to fabricate highly flexible and mechanically stable antennas without compromising their electrical properties [4].In [5], a broader review of fluidics-based tuning methods for the development of microwave components was presented. Although, this included a review of antennas based on dielectric/conductive fluids, it primarily covered flexible and frequency-tunable antenna/arrays and lacked depth on polarization/pattern reconfigurability techniques. Additionally, discussion of recent advancements in state-of-the-art liquid metal applications was also missing in [5]. In [6], a mini review of flexible and stretchable antennas based on textile materials was discussed. Here, the focus was on the benefits of conductive filler-based elastomers used in antennas for bio-integrated electronics applications and the trade-off between antenna stretchability and its performance. However, a detailed review of materials, novel fabrication te...

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Dual‐band circular‐polarization reconfigurable liquid dielectric resonator antenna

Cited by 9 publications

References 16 publications

On the multi‐resonant antennas: Theory, history, and new development

On the multi‐resonant antennas: Theory, history, and new development

A Review on Reconfigurable Liquid Dielectric Antennas

Liquid Metal Antennas: Materials, Fabrication and Applications

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