This paper has presented a comprehensive overview of on-chip antennas, which remain the last bottleneck for achieving true SoC RF solutions. CMOS remains mainstream IC technology choice but is not well suited requiring use innovative design techniques to overcome its shortcomings. Codesign circuits and antennas provide leverage designer achieve optimum performance. The layout dictated by foundry specific rules whereas characterization requires special text fixtures. For future highly...

A low-cost inkjet-printed multiband antenna envisioned for integration into flexible and conformal mobile devices is presented. The structure contains a novel triangular iterative design with coplanar waveguide (CPW) feed, printed on Kapton polyimide-based substrate dimensions of 70×70×0.11 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . covers four wide frequency bands measured impedance bandwidths 54.4%, 14%, 23.5% 17.2%, centered...

In this letter, a 28.5-bit chipless RFID tag, based on paper substrate and realized using inkjet printing technique is presented. Operating within ultrawideband, the tag occupies compact size of 2 ×4 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . Focusing applications requiring time date identification, novel encoding presented that allows efficient frequency band allocation number required instances variables. A figure merit (FOM)...

Polymer blends of poly vinyle chloride (PVC) and polyaniline (PANI) with the inclusion graphene nano platelets (GNP) are fabricated to enhance EMI shielding effectiveness. The initial assessment cyclic voltammetry has shown improved electrical conductivity both for PVC/PANI PVC/PANI/GNP composites. capacitive effect composites is evaluated at lower frequency region (100 Hz−5 MHz). measurements performed in range 10 MHz–20 GHz. In case (15 wt%) blends, a maximum attenuation ∼27 dB attained...

An inkjet-printed, fully passive sensor capable of either humidity or gas sensing is presented herein. The composed an interdigitated electrode, a customized printable sensitive ink and specialized dipole antenna for wireless sensing. electrode printed on paper substrate provides the base conductivity that varies during process. Aided by porous nature substrate, change in relative from 18% to 88% decreases resistance few Mega-ohms kilo-ohm range. For sensing, additional copper acetate-based...

Abstract This paper presents a novel additively manufactured antenna array on flexible polymeric substrate for conformal mobile applications. The consists of two identical z-shape patch elements integrated with symmetrical arrangements and right-angle ground assemblies to converge the dispersed radiation pattern gain improvement. For planar feeding fabrication, is fed coplanar waveguide and, horizontal defected structures are used in achieve multiband characteristics. prototype antenna,...

This paper presents a review of wireless power transfer (WPT) followed by comparison between ambient energy sources and an overview different components rectennas that are used for RF harvesting. Being less costly environment friendly, to provide potentially inexhaustible powering up low sensors portable devices installed in inaccessible areas where frequent battery replacement is difficult, if not impossible. The current challenges rectenna design detailed state-of-the-art also presented.

A 54.6 GHz divide-by-3 injection locked frequency divider with low power consumption is presented. resistive feedback implemented to achieve a stable dc input and higher efficiency. Compared the conventional design, it exhibits better supply voltage rejection wider locking range while small silicon area maintained. Fabricated in TSMC 65 nm bulk CMOS process, this operates from 48.8 consumes 3 mW 0.9 V supply.

To meet the growing demand for miniaturization and compactness, antennas are being designed over CMOS chips. On-chip (OCAs) suffer from low gains radiation efficiency due to high dielectric constant resistivity of Silicon. Artificial magnetic conductors (AMC) used in OCAs increase gain reduce power confinement substrate. In this paper, a bowtie slot antenna is presented whose enhanced by an array back-to-back E-shaped (B2BE) frequency selective surface (FSS). The operating 94 GHz where its...

A double-rhomboid bowtie-slot on-chip antenna aided by a back-to-back E-shaped electromagnetic bandgap (EBG) surface for gain enhancement at W-band is presented. The specific structure of both the and EBG being reported first time in an implementation. analyzed independently as well backed different reflective surfaces using standard 0.13 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math...

Asymmetric transmission (AT) through metasurfaces yields a direction-sensitive behavior for electromagnetic (EM) wave propagation. To date, majority of the reported works operate at normal incidences alone and are, therefore, highly prone to variations under oblique incidences. In contrast, chiral metasurface presented in this letter is robust up 60 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> incident angle while yielding magnitude...

A radio frequency identification (RFID) chipless tag that achieves a high code capacity through multiple closed loop printed resonators is presented. By making the polarization dependent, same band within UWB from 3.1 to 7.6 GHz re-used, hence doubling of tag. The excited using linearly polarized vertical and horizontal plane waves radar cross section versus analyzed. Using shift encoding enables each six represent more than one bit. Thus, in small dimension 6 × 3 cm <sup...

A two-way tunable power divider for Simultaneous Wireless Information and Power Transfer (SWIPT) is proposed in this paper. The divides the incoming such a way that maximum utilized energy harvesting purposes rest of used information decoding purposes. This unequal distribution realized by tuning varactor diode's reverse biasing voltages. good matching performance attained using radial short stubs at input one output ports, respectively. High isolation achieved with help resistor connecting...

This paper presents a quad-band, 3D mountable rectenna module for ambient energy harvesting. With the aim of powering up Internet Things (IoT) nodes in practical environments, hybrid approach combining power, both at RF and DC, is adopted using 98 MHz FM band, GSM900 (Global System Mobile Communications), GSM1800, Wi-Fi 2.4 GHz band. A dual polarized cross-dipole antenna featuring asymmetric slots as well central ring structure enables multiband response improved matching higher three...

Abstract A multi-layered chiral device manifesting asymmetric transmission (AT) facilitating one-way channeling of electromagnetic (EM) waves, based on the inherent polarization is presented. The designed metasurface depicts a high contrast with an efficiency above 80% for ultra-wide operational range 6.3–12.3 GHz, constituting fractional bandwidth 64%. As additional feature, reported yields robustness against oblique incidences up to 45 $$^\circ $$ <mml:math...

Asymmetric Transmission (AT) allows direction-sensitive control of electromagnetic waves that is highly desirable in optical and microwave communication applications. In this paper, an angle-induced chirality enhancement approach proposed through the introduction angled splits a split ring resonator based unit cell. This design approach, which enhances cross coupling, has been analytically experimentally validated, yielding efficient broadband AT operation with 27.1% fractional bandwidth...

This paper presents a broadband, static, 2:1 frequency divider in bulk 90 nm CMOS LP (low-power) technology with maximum operating of 35.5 GHz. The exhibits an enhanced input sensitivity, below 0 dBm, over broad range 31 GHz and consumes 24 mA from 1.2 V supply. phase noise the is -124.6 dBc/Hz at 1 MHz offset carrier.

Coherent pulse integration is a well-known technique for effective target detection with increased output signal-to-noise ratio (SNR). Radon Fourier transform (RFT) uses long-time coherent improved in 3-D search but increases the parameters time. This article presents new approach of segmented RFT (SRFT) fast high-speed targets without significantly degrading performance. SRFT divides received echo data matrix into an arbitrary number segments along slow-time dimension matrix. Each segment...

This paper introduces a precision agriculture application aimed at mitigating the excessive utilization of agricultural chemicals, including pesticides and fungicides during crop spraying. The prevailing spraying techniques face two principle challenges: first, indiscriminate dispensation chemicals irrespective plant size requirements second, farmer's exposure to health hazards. To tackle these issues, detection segmentation model employing both YOLOv5 YOLOv6 architectures is proposed...

This Letter presents a detailed comparison of carbon nanotube field effect transistors (CNFETs) and metal oxide semiconductor (MOSFETs) with special focus on FET's potential for implementing analogue circuits in the mm-wave sub-terahertz range. The latest CNFET lithographic dimensions place it at-par complementary terms current handling capability, whereas forecasted improvement lithography enables CNFETs to handle more than twice MOSFETs. RF parameters shows superior performance gm, f T max...