Polyurethane membranes for flexible centimeter-wave patch antennas

Baron, Samuel H.; Guiffard, Benoît; Sharaiha, Ala

doi:10.1088/0960-1317/24/7/075020

Cited by 7 publications

(5 citation statements)

References 28 publications

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“…From the viewpoint of radiation characteristics, a very good agreement between the experiment and the simulation of the return loss has been observed. Compared to previous studies where elastomerbased soft dielectric was used for the same type of antenna of similar frequencies as mentioned in [16,17], the overall performances of the antenna in the pre sent work is promising with a gain of 4.56 dB and 4.88 dB and an efficiency of 46% and 51% for the rPP and LDPE based blends respectively at 10 GHz. This proof of concept is a key step to the next level which demonstrates the possibility of integrating the antenna on real electronic device system with flexible ground plane, in view of developing high sensitivity strain antenna sensor, for instance.…”

Section: Discussionmentioning

confidence: 80%

“…In this context, HageAli et al [16] developed a technical process for depositing an array of patch antennas on a polydimethylsiloxane (PDMS) substrate, which efficiency and gain have been measured 28% and 12 dBi respectively at 55 GHz. In another study, Baron et al [17] developed a microstrip patch antenna based on thermoplastic polyurethane (TPU) and measurement in anechoic chamber has shown a gain and an efficiency of 3.25 dBi and 30% at 10 GHz. In the latter study, the patch antenna had quite acceptable performance considering the dielectric loss of TPU substrate which reached 0.1 (10%) at 10 GHz.…”

Section: Introductionmentioning

confidence: 99%

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New low loss soft thermoplastic blends for microwave applications

Sghaier¹,

Gibari²,

Guiffard³

2020

J. Phys. D: Appl. Phys.

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All organic soft dielectrics are growing more and more interest in the electronic industry owing to their light weight, low cost and the flexibility they yield compared to the rigid devices. In the specific field of microwave communicating devices planar printed (patch) antennas on a soft dielectric substrate are sought for their conformability and advantageous compactness. In this article, two soft thermoplastic elastomer blends based on polypropylene (PP) or lowdensity polyethylene (LDPE) were tested. The fabrication process and the established characterization steps have been fully presented. More specifically, in order to characterize the dielectric film up to 40 GHz, the microstrip ring resonator with coplanar waveguide access has been adapted to a new configuration specimen sample. The results of the characterizations obtained showed very encouraging performances for microwave applications. Indeed, the measured dielectric constant and loss tangent up to 40 GHz were found to be ε r ≈ 2.45 and tan δ ≈ 0.01 for both blends. The fabrication and the radiation characteristics of a patch antenna on a new performing PP or LDPEbased elastomer blends as the soft dielectric substrate was demonstrated and analysed. The proof of the concept of the investigated device consists of a microstrip patch antenna with an operation frequency of about 10 GHz. These dielectric features render the polyolefin based blends very promising as a soft material for microwave engineering, which is confirmed by the measured antenna properties: the gain, the directivity as well as the efficiency have been calculated from the measured radiation pattern and were recorded as 4.6 dB, 7.7 dB and 46% respectively for the rPP based blend and 4.8 dB, 8.1 dB and 51% for the LDPE based blend.

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Section: Discussionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

New low loss soft thermoplastic blends for microwave applications

Sghaier¹,

Gibari²,

Guiffard³

2020

J. Phys. D: Appl. Phys.

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“…Different measurement methods were used to determine the dielectric property values, such as the hybrid microstrip-line method, stub resonator and a broadband method based on a stripline cell [13,14]. In this case, the relative permittivity and losses were characterized using the single frequency method based on an open-stub resonator [6,15].…”

Section: Characterization Of the Textile For The Design Of The Antennamentioning

confidence: 99%

A Textile EBG-Based Antenna for Future 5G-IoT Millimeter-Wave Applications

et al. 2021

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A millimeter-wave (mmWave) textile antenna operating at 26 GHz band for 5G cellular networks is proposed in this paper. The electromagnetic characterization of the textile fabric used as substrate at the operating frequency was measured. The textile antenna was integrated with an electromagnetic bandgap (EBG) structure and placed on a polyester fabric substrate around the antenna. Results showed that the proposed EBG significantly improved the performance of the antenna. The gain and energy efficiency at 26 GHz were 8.65 dBi and 61%, respectively (an increase of 2.52 dB and 7% compared to a conventional antenna), and the specific absorption rate (SAR) was reduced by more than 69.9%. Good impedance matching of the fabricated antenna at the desired frequency was observed when it was bent and worn on the human body. The structure is simple, compact, and easy to manufacture. It may well be suitable for integration into applied clothing in various fields, especially for future IoT applications.

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“…In Reference [96], a similar idea is realised on a polyurethane (PU) substrate. Compared to PDMS, PUs can be more easily metalized due to a lower thermal expansion coefficient.…”

Section: Cavitiesmentioning

confidence: 99%

“…Compared to PDMS, PUs can be more easily metalized due to a lower thermal expansion coefficient. Moreover, the Young's modulus of PUs is higher, thus PUs are more stiff compared to PDMS which means better mechanical stability but less stretchability [96]. The fabricated patch antenna had the dimensions of 30 × 30 mm 2 and demonstrated a 32% efficiency and a 3.9% frequency agility.…”

Section: Cavitiesmentioning

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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Polyurethane membranes for flexible centimeter-wave patch antennas

Cited by 7 publications

References 28 publications

New low loss soft thermoplastic blends for microwave applications

New low loss soft thermoplastic blends for microwave applications

A Textile EBG-Based Antenna for Future 5G-IoT Millimeter-Wave Applications

A Review on Reconfigurable Liquid Dielectric Antennas

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