Flexible UWB antenna fabricated on polyimide substrate by surface modification and in situ self-metallization technique

Wang, Zhiliang; Qin, Lin; Chen, Qingyue; Yang, Wenwen; Qu, Huiwen

doi:10.1016/j.mee.2018.12.006

Cited by 41 publications

(32 citation statements)

References 12 publications

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“…As shown in Figure 3a, the XRD patterns tally well with the data of the standard JCPDS (04-0783), indicating that the silvered PI film surface is constructed by face-centered cubic silver crystalline particles [18]. in 0.04 M Ag(NH3)2OH solution for 2 h, which resulted in the formation of silver ion-doped layers.…”

Section: Crystal Structuressupporting

confidence: 71%

“…This technique requires no high-temperature thermal annealing, costly equipment, or vacuum conditions [18]. In the previous work, antennas on PI substrates [18] were fabricated by the proposed technique, and the performance of the fabricated antenna was excellent, demonstrating that the proposed technique could be used to manufacture microwave devices. As a key component of the radio frequency (RF) front, bandpass filters should also be developed for flexible devices.…”

Section: Introductionmentioning

confidence: 88%

“…The insertion in Figure 3b indicates that the thickness of the formed metallized layer is approximately 7.611 µm. According to the literature [10,17,18], it is found that when the PI film was immersed in 4 M KOH solution for 3.5 h and 0.04 M Ag(NH 3 ) 2 OH solution for 2 h, a silver layer with a Polymers 2019, 11, 2068 5 of 9 thickness of about 7.6 µm can be obtained. At this time, the silver layer has the smallest resistivity, which meets the requirements for the filters.…”

Section: Morphologiesmentioning

confidence: 99%

“…In order to improve the adhesion of passive metals on the PI substrate, surface modification and in situ self-metallization technique was presented [16,17]. This technique requires no high-temperature thermal annealing, costly equipment, or vacuum conditions [18]. In the previous work, antennas on PI substrates [18] were fabricated by the proposed technique, and the performance of the fabricated antenna was excellent, demonstrating that the proposed technique could be used to manufacture microwave devices.…”

Section: Introductionmentioning

confidence: 97%

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Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Wang

Cang

2019

Polymers

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Polymer, especially polyimide (PI), is the best suitable substrate material for the design of flexible electronics. The compact silver can be reduced on the surface of PI films by surface modification and in situ self-metallization technique. The formed silver layers have good electrical and mechanical flexibility. A flexible bandpass filter on a PI flexible substrate by surface modification and in situ self-metallization technique at room temperature are presented in this work. Measured results show that the proposed flexible bandpass filter could achieve a fractional bandwidth of 80.8% with an insertion loss (IL) of less than 0.6 dB. The performance of the designed filter is almost constant under different bending, folding, and rolling conditions. The formed silver layers also present good adhesion with PI substrates. This technology provides an alternative approach for manufacturing flexible filters without high-temperature thermal annealing, costly equipment, and vacuum conditions.

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Section: Crystal Structuressupporting

confidence: 71%

Section: Introductionmentioning

confidence: 88%

Section: Morphologiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Wang

Cang

2019

Polymers

Self Cite

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“…This antenna is covering a wide range of frequencies marginally qualifying as an SWB antenna. Some other flexible wideband antennas are reported in the literature as well [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Compact CPW‐fed circular patch flexible antenna for super‐wideband applications

Hasan

Riheen

Sekhar

et al. 2020

IET Microwaves, Antennas & Propagation

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This study proposes a coplanar waveguide‐fed circular monopole antenna that is designed by ink‐jetting conductive silver particle ink on photo paper. The antenna comprises a slotted circular patch and a reduced symmetrically slotted ground plane that is etched rectangularly. The slotted circular patch and ground plane provide the design flexibility with a broad bandwidth, substantial gain over 1.66–56.1 GHz frequency band, and relatively consistent radiation pattern. The fractional bandwidth (%BW) of this antenna is 188.5% that is covering industrial, scientific, and medical (ISM) bands, ultra‐wideband, wireless local area network (WLAN) band, worldwide interoperability for microwave access (WiMAX) band, and various frequencies of upcoming fifth‐generation technology. The total size of the antenna is only 34 × 25 mm2, with an electrical dimension of 0.18 λ × 0.13 λ at 1.66 GHz. The bandwidth ratio (BR) is 33.81:1, and the bandwidth dimension ratio (BDR) is 7462, which is the highest among the flexible super‐wideband antennas reported so far. It is a low profile, lightweight, and low‐cost antenna that is accommodating a broad frequency spectrum for extended wideband communication. The measured results show good agreement with the simulations.

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A wideband flexible antenna utilizing PMMA/PVDF‐HFP/PZT polymer composite film and silver‐based conductive ink for wearable applications

Douhi,

Boumegnane,

Chakhchaoui

et al. 2024

Polymers for Advanced Techs

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The relentless drive towards miniaturization and seamless integration of electronic components in wireless communications and wearable devices has significantly increased the demand for flexible, cost‐effective composites with high dielectric constants and low losses. This study presents a wideband, low‐profile, and flexible antenna with excellent on body radiation performance for wearable applications. The antenna is designed using a low‐loss composite film based on PMMA‐PVDF‐HFP‐PZT and silver‐based ink. The proposed flexible antenna exhibits a wide bandwidth of 132.16% with a voltage standing wave ratio (VSWR) of less than two. It achieves a peak gain of 2.76 dBi at 2.92 GHz and maintains a maximum radiation efficiency of 80% across the 1.26–6.17 GHz frequency range. These characteristics demonstrate that the antenna is an effective solution for achieving high data rates and reliable communication links. The antenna's suitability for wearable applications is assessed by testing it on a simulated human body and analyzing its behavior under physical deformation. The results under bending showed only a minimal frequency detuning, which is negligible given the antenna's wide operational bandwidth. The specific absorption rate (SAR) analysis shows values of approximately 1.88 W/kg at 3.5 GHz with an input power of 0.5 W, and 0.279 W/kg at 5.8 GHz with an input power of 0.45 W, which complies with established safety limits for exposure. Overall, these results suggest that the proposed antenna is a viable solution for integration into wearable medical devices, such as a doctor's chest badge, enabling noncontact interactions and reducing the risk of bacterial contamination.

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Flexible UWB antenna fabricated on polyimide substrate by surface modification and in situ self-metallization technique

Cited by 41 publications

References 12 publications

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Compact CPW‐fed circular patch flexible antenna for super‐wideband applications

A wideband flexible antenna utilizing PMMA/PVDF‐HFP/PZT polymer composite film and silver‐based conductive ink for wearable applications

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