Graphene Inkjet-Printed Ultrawideband Tapered Coplanar-Waveguide Antenna on Kapton Substrate

Ibanez‐Labiano, Isidoro; Nourinovin, Shohreh; Alomainy, Akram

doi:10.23919/eucap51087.2021.9411124

Cited by 8 publications

(6 citation statements)

References 23 publications

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“…indicates that the reported result is simulated or measured, and "Tune" refers to the tunability characteristics of the antenna. As a further proof of what has been already demonstrated in the literature (i.e., the fact that microwave applications of graphene for radiators are avoided due to high losses), [26]- [28] report only simulated results for both Gmax and ηmax, with [27] and [28] using too optimistic values of Rs in biased state. Besides this, even if [28] exploits graphene monolayer's tunability to modulate the gain (the graphene being used for the directors, nor for the driven element), it does not show how it could be realized from a technological point of view: it is declared that the silicon sheet acts as the ground plane for the polarization, but this would be possible only if it were a low-resistivity silicon layer, which hinders any antenna application at microwaves.…”

Section: Measured Simulatedmentioning

confidence: 87%

Tunable 24-GHz Antenna Arrays Based on Nanocrystalline Graphite

Aldrigo¹,

Dragoman

Iordanescu

et al. 2021

IEEE Access

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In this work, we present a tunable 24-GHz antenna array based on a CMOS-compatible 110nm-thick nanocrystalline graphite film grown by plasma enhanced chemical vapor deposition. The film has a nominal bulk conductivity exceeding 16000 S/m (hence, greater than any graphene monolayer or industrially available graphene multilayer) but still able to show an outstanding modulation of its charge carrier density in the upper microwave spectrum. The manufactured layer was used to design, simulate, fabricate, and test a 24-GHz patch antenna array, with each radiating element having overall dimensions of just λ0/8×λ0/7. The fabricated array exhibits a measured maximum gain of about 3 dBi around 24 GHz (unbiased state), with a half-power beam width of only 14.5° (suitable in wireless links where a high directivity is envisaged). Spanning the dc bias voltage between -25 V and 25 V at 24 GHz, the gain can be tuned continuously between -1.5 dBi and 4 dBi, whereas the resonance frequency undergoes a maximum shift of 166 MHz. This voltage-dependent tuning of the gain represents a first step in developing carbonbased applications to control amplitude and phase simultaneously and independently. These results (never reported) demonstrate the big potential of nanocrystalline graphite for high-performance microwave components that are CMOS compatible (a highly desirable characteristic for high fabrication yield and largescale production), with unprecedented tunability for next-generation high-capacity communications.

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Section: Measured Simulatedmentioning

confidence: 87%

Tunable 24-GHz Antenna Arrays Based on Nanocrystalline Graphite

Aldrigo¹,

Dragoman

Iordanescu

et al. 2021

IEEE Access

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“…In one study, for example, an antenna not used for a specific application reached an efficiency of 84%. 114 (continued on next page) A proposed application of an inkjet antenna that is currently quite relevant is an inkjet-printed 5G antenna. [115][116][117][118] Mass production of inkjet-printed antennas for 5G is likely appealing for its manufacturing ease and lower cost.…”

Section: Applications Of Inkjet Antennasmentioning

confidence: 99%

Progress in Inkjet-Printed Sensors and Antennas

Sandry,

Shila,

Gonzalez-Jimenez

et al. 2023

Electrochem. Soc. Interface

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In recent years, inkjet printing has become a popular form for creating sensors and antennas. These devices are fabricated using different materials with inkjet printing using various (conductive, oxide, biological) inks on predominantly flexible substrate. This form of fabrication has attracted much attention for a variety of reasons such as relatively cheap cost of manufacturing and materials, as well as the ease of use and high customization. These devices also provide a lighter frame and added flexibility allowing them to be incorporated as devices on non-planar surfaces. It is also possible for inkjet printing to be used as a sustainable manufacturing method, providing a method of reducing electronic waste. In this article, several topics related to inkjet printing are covered. These topics include a general overview of the fabrication process of inkjet devices through an inkjet printer, recent applications of inkjet-printed sensors, applications of inkjet-printed antennae, challenges in inkjet printing, and an outlook on the inkjet printing. In the fabrication section, the different materials and printing process are explored. Topics covered in the application section include gas sensors, biomedical sensors, pressure sensors, temperature sensors, glucose sensors, and more. In the inkjet antennas portion of the article, RFID tagging and 5G applications are highlighted. The main challenges covered are specific to fabrication that are being currently addressed.

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“…Graphene-based ink is an alternative to metallic conductive inks for its relatively excellent conductivity, environmental tolerance, and better system integration that requires flexibility. It also improves the device’s durability and prevents high-level deformation discontinuities [ 40 , 41 ]. However, inkjet printing for radiofrequency applications is complex as it requires precise control to achieve the required conductivity and surface roughness [ 12 ].…”

Section: Flexible Materialsmentioning

confidence: 99%

Flexible UWB and MIMO Antennas for Wireless Body Area Network: A Review

Jhunjhunwala

Ali

Kumar

et al. 2022

Sensors

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In recent years, there has been a surge of interest in the field of wireless communication for designing a monitoring system to observe the activity of the human body remotely. With the use of wireless body area networks (WBAN), chronic health and physical activity may be tracked without interfering with routine lifestyle. This crucial real-time data transmission requires low power, high speed, and broader bandwidth communication. Ultrawideband (UWB) technology has been explored for short-range and high-speed applications to cater to these demands over the last decades. The antenna is a crucial component of the WBAN system, which lowers the overall system’s performance. The human body’s morphology necessitates a flexible antenna. In this article, we comprehensively survey the relevant flexible materials and their qualities utilized to develop the flexible antenna. Further, we retrospectively investigate the design issues and the strategies employed in designing the flexible UWB antenna, such as incorporating the modified ground layer, including the parasitic elements, coplanar waveguide, metamaterial loading, etc. To improve isolation and channel capacity in WBAN applications, the most recent decoupling structures proven in UWB MIMO technology are presented.

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Graphene Inkjet-Printed Ultrawideband Tapered Coplanar-Waveguide Antenna on Kapton Substrate

Cited by 8 publications

References 23 publications

Tunable 24-GHz Antenna Arrays Based on Nanocrystalline Graphite

Tunable 24-GHz Antenna Arrays Based on Nanocrystalline Graphite

Progress in Inkjet-Printed Sensors and Antennas

Flexible UWB and MIMO Antennas for Wireless Body Area Network: A Review

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