Magnetically Reconfigurable SIW Antenna with Tunable Frequencies and Polarizations

Tan, Li-Rong; Wu, Rui‐Xin; Poo, Yin

doi:10.1109/tap.2015.2414446

Cited by 68 publications

(28 citation statements)

References 13 publications

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“…These methods are not only power consuming with less tunability range, but also cause nonlinearity in terms of undesirable frequency components. Alternatively, frequency agility can be achieved by employing ferromagnetic or liquid crystal materials [58]. Though this method has low power consumption losses, it suffers from a complex tuning process alongside limited frequency tunability.…”

Section: Reconfigurability In Lm 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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Section: Reconfigurability In Lm Antennasmentioning

confidence: 99%

Liquid Metal Antennas: Materials, Fabrication and Applications

Paracha

Butt

Alghamdi

et al. 2019

Sensors

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“…A full suite of microwave devices have been developed with SIC, e.g., filters Pourghorban ; Le Coq et al [2015], couplers Djerafi et al [2014]; Chen et al [2006], phase shifters Djerafi et al [2015], antennas Tekkouk et al [2016]; Tan et al [2015], and tunable devices Entesari et al [2015]. All these devices prove the interesting characteristics of SIC for being used in the microwave industry.…”

Section: 1002/2016rs006181mentioning

confidence: 99%

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

et al. 2017

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Substrate integrated circuits (SIC) have attracted much attention in the last years because of their great potential of low cost, easy manufacturing, integration in a circuit board, and higher‐quality factor than planar circuits. A first suite of SIC where the waves propagate through dielectric have been first developed, based on the well‐known substrate integrated waveguide (SIW) and related technological implementations. One step further has been made with a new suite of empty substrate integrated waveguides, where the waves propagate through air, thus reducing the associated losses. This is the case of the empty substrate integrated waveguide (ESIW) or the air‐filled substrate integrated waveguide (air‐filled SIW). However, all these SIC are H plane structures, so classical H plane solutions in rectangular waveguides have already been mapped to most of these new SIC. In this paper a novel E plane empty substrate integrated waveguide (ESIW‐E) is presented. This structure allows to easily map classical E plane solutions in rectangular waveguide to this new substrate integrated solution. It is similar to the ESIW, although more layers are needed to build the structure. A wideband transition (covering the frequency range between 33 GHz and 50 GHz) from microstrip to ESIW‐E is designed and manufactured. Measurements are successfully compared with simulation, proving the validity of this new SIC. A broadband high‐frequency phase shifter (for operation from 35 GHz to 47 GHz) is successfully implemented in ESIW‐E, thus proving the good performance of this new SIC in a practical application.

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“…Frequency tunable antennas still attract many researchers' attention and many tuning techniques have been reported to obtain the agility. Some techniques have used "intelligent" substrates including ferromagnetic substrates and liquid crystal materials [5], [6]. A number of other works employs active localized components, such as PIN diodes [7], [8], MEMS [9] and exclusively varactor diodes [10] which are easy to integrate with planar structures and present a continuous and great agility.…”

Section: Introductionmentioning

confidence: 99%

Low-profile Slotted SIW Cavity Backed Antenna for Frequency Agility

Sboui¹,

Macháč²,

Gharsallah³

2019

RADIOENGINEERING

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The agile frequency antennas are widely used for wireless communication systems. This paper studies and designs a low-profile SIW antenna radiating from a circular slot graved in the ground plane, with the ability of alternating the frequency. The antenna is intentionally designed within a range of 1.8 GHz to 2.18 GHz obtained by varying the DC bias voltages from 0 to 26 V, which is able to cover the GSM1800, the LTE, and the UMTS wireless standards. The tuning technique consists in the integration of two varactor diodes across the circular slot. A prototype was manufactured, and the experiment results correspond well to those of the simulations.

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Magnetically Reconfigurable SIW Antenna with Tunable Frequencies and Polarizations

Cited by 68 publications

References 13 publications

Liquid Metal Antennas: Materials, Fabrication and Applications

Liquid Metal Antennas: Materials, Fabrication and Applications

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

Low-profile Slotted SIW Cavity Backed Antenna for Frequency Agility

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