A Low-Cost CPW-Fed Multiband Frequency Reconfigurable Antenna for Wireless Applications

Khan, Tayyaba; Rahman, MuhibUr; Akram, Adeel; Amin, Yasar; Tenhunen, Hannu

doi:10.3390/electronics8080900

Cited by 42 publications

(29 citation statements)

References 30 publications

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“…Researchers have focused on conventional designs using textile materials and inkjet/screen printing methods [ 17 ]. However, they have not been able to solve all the existing challenges previously mentioned, despite showing some acceptable outcomes [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 ]. Thus, it is imperative, in retrospect of the recent progress in wearable antennas and their applications in the WBAN systems.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

et al. 2020

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The demand for wearable technologies has grown tremendously in recent years. Wearable antennas are used for various applications, in many cases within the context of wireless body area networks (WBAN). In WBAN, the presence of the human body poses a significant challenge to the wearable antennas. Specifically, such requirements are required to be considered on a priority basis in the wearable antennas, such as structural deformation, precision, and accuracy in fabrication methods and their size. Various researchers are active in this field and, accordingly, some significant progress has been achieved recently. This article attempts to critically review the wearable antennas especially in light of new materials and fabrication methods, and novel designs, such as miniaturized button antennas and miniaturized single and multi-band antennas, and their unique smart applications in WBAN. Finally, the conclusion has been drawn with respect to some future directions.

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Section: Introductionmentioning

confidence: 99%

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

et al. 2020

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“…Even though these switches can be easily integrated into antenna structure, they require high voltage (RF-MEMS, varactors) and biasing lines that may add losses and distort the antenna radiation pattern [4]. An example of an electrical reconfiguration technique applied for WLAN and Bluetooth can be found in Reference [10].…”

Section: Introductionmentioning

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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“…An alternate method for frequency reconfigurability is shown in [7], where through the activation of different combinations of PIN diodes, adjacent frequencies can be also utilized. The PIN diodes can Electronics 2020, 9, 1166 2 of 13 also be applied to achieve frequency altering in case of multiband behavior as explained in [8]. Here the only striking diversity is that while the general resonant properties remains the same, each case of PIN diode configuration result to better matching for different frequencies of the same bandwidth.…”

Section: Introductionmentioning

confidence: 99%

A Reconfigurable Polarization—Frequency Supershape Patch Antenna with Enhanced Bandwidth

et al. 2020

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In this article a reconfigurable antenna for WLAN/WiMAX applications is presented. A super-shape radiator of an ellipsis shape is used to achieve wider intrinsic bandwidth compared to the classical rectangular patch antenna, while the dimensions remain comparable. The proposed antenna is fed at two points exciting both horizontal and vertical polarization but in different operating frequencies. To achieve wider bandwidth, as a whole but also for each polarization, the symmetrical feeding points for each excitation are also employed with a proper feeding network. PIN diodes are also used in the feeding network to provide the option of narrower bandwidth. The antenna substrate is Rogers RO4003C with dielectric constant εr = 3.55 and dissipation losses tanδ = 0.0027 with height h = 1.524 mm. The antenna operates in the range of 2.3 GHz to 2.55 GHz but, using the proposed procedure, it can be designed for different frequency ranges.

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A Low-Cost CPW-Fed Multiband Frequency Reconfigurable Antenna for Wireless Applications

Cited by 42 publications

References 30 publications

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

Recent Advances of Wearable Antennas in Materials, Fabrication Methods, Designs, and Their Applications: State-of-the-Art

A Review on Reconfigurable Liquid Dielectric Antennas

A Reconfigurable Polarization—Frequency Supershape Patch Antenna with Enhanced Bandwidth

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