A Compact Cavity-Backed Slot Antenna Using Dual Mode for IoT Applications

Oh, Ju-Ik; Jo, Hye-Won; Kim, Kwang-Seok; Cho, Hyun-Young; Yu, Jong‐Won

doi:10.1109/lawp.2021.3049219

Cited by 25 publications

(13 citation statements)

References 17 publications

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“…In this paper, we introduce a mechanism for explicit treatment of expensive constraints, adopting the trust-region (TR) framework [24]. The TR algorithm is an iterative procedure for solving (1), which produces approximations x (i) , i = 0, 1, …, to x * . Subsequent vectors x (i) are obtained through local optimization of a local (usually, linear, e.g., first-order Taylor, or quadratic) models UL (i) of the objective function U, established at the current iteration point x (i) , as…”

Section: B Explicit Handling Of Expensive Constraints the Conceptmentioning

confidence: 99%

“…Preserving small size is an important consideration in the design of contemporary antenna systems. It has become even more essential with the emergence of new application areas, for which compact dimensions is a prerequisite (internet of things [1], wearable [2] and implantable devices [3], mobile communications [4] including 5G [5], medical imaging [6]). Structural miniaturization can be achieved by the appropriate selection of antenna architecture [7], or with the aid of topological modifications, e.g., stubs [8], defected ground structures [9], shorting pins [10], etc.…”

Section: Introductionmentioning

confidence: 99%

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On EM-Driven Size Reduction of Antenna Structures With Explicit Constraint Handling

Pietrenko‐Dabrowska

Koziel

2021

IEEE Access

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Simulation-driven miniaturization of antenna components is a challenging task mainly due to the presence of expensive constraints, evaluation of which involves full-wave electromagnetic (EM) analysis. The recommended approach is implicit constraint handling using penalty functions, which, however, requires a meticulous selection of penalty coefficients, instrumental in ensuring optimization process reliability. This paper proposes a novel size reduction technique with explicit handling of design constraints. Our approach employs trust-region gradient-based procedure as an underlying optimization engine, and adjusts the search radius based on assessing the quality of representing constraints by auxiliary linear expansion models (versus their exact evaluation through EM analysis), rather than based on the quality of objective rendition. This unconventional utilization of trust region framework leads to a procedure that is demonstrably superior over implicit methods, as indicated by comprehensive numerical studies involving three broadband antennas, and benchmarking against state-of-the-art techniques. The two most attractive features of our methodology are simplicity, and no need to tune the algorithm for a specific problem at hand.

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Section: B Explicit Handling Of Expensive Constraints the Conceptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On EM-Driven Size Reduction of Antenna Structures With Explicit Constraint Handling

Pietrenko‐Dabrowska

Koziel

2021

IEEE Access

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“…More FR antennas are presented in Hussain et al 12 and Mopidevi et al 13 Most of the demonstrated designs have large physical sizes, nonplanar structure, or nonconfigurable antenna. [14][15][16][17] This makes them less suitable for IoT applications. Sub-GHz slot antennas were presented in Hussain et al 12 and Mopidevi et al 13 The demonstrated antennas only reconfigurable above 2 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…Dipole, monopole, and elevated printed inverted‐F (PIFA) antennas presented in Yang and colleagues 9–11 operated in the sub‐GHz bands. More FR antennas are presented in Hussain et al 12 and Mopidevi et al 13 Most of the demonstrated designs have large physical sizes, nonplanar structure, or nonconfigurable antenna 14–17 . This makes them less suitable for IoT applications.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐miniaturized tunable slot‐based antenna design for 5G IoT applications

Hussain¹,

Aljaloud

Alhuwimel

2023

Micro & Optical Tech Letters

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This paper demonstrates a compact‐size folded slot‐based antenna suitable for internet‐of‐things (IoT) applications. The antenna is composed of a folded structure meandered slot loaded with varactor diode. The novel combination of the slot and varactor diode, reactively loading the slot, lead to highly miniaturized antenna. The presented antenna operates in dual frequency bands: from 730 to 965 MHz and 1250 to 1940 MHz. Continuous frequency sweep over the two bands is achieved by the use of a single varactor diode. Due to antenna compact size, it is highly suitable for 5G IoT applications. The total board dimensions of the proposed design are 27 mm × 27 mm.

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“…Commonly used antenna types for IoT in products include printed circuit board and chip antenna design. [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Planar Monopole Antenna Based on a Coupling Structure for Compact Mobile Internet of Things (IoT) and Electric Vehicles (EVs) Device Applications in 5G, LTE, WLAN, WiMAX, Sirius/XM Radio, V2X, and DSRC Wireless Systems

Chung

Yang

2021

International Journal of Antennas and Propagation

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A miniaturized internal antenna with monopole structure is constituted, including three radiating strips of a compact prototype and a back-coupling pad to improve the impedance matching, which achieves a wide bandwidth of 2.972 GHz between the operating frequencies of 2315–5285 MHz, and is introduced and researched. There is an urgent need for a complete frequency-continuous and large bandwidth design in the current wireless communication design to achieve a multimode, multifrequency, physical phenomenon design with large bandwidth and continuous operating frequency. The recommended antenna provides a broadband operation in an electric vehicles (EVs) and Internet of Things (IoT) devices application embedded in the wireless communication standard for 5G, LTE, V2X, WLAN, WiMAX, Sirius/XM Radio, V2X, and DSRC to support the multiband application. This design is embedded side edge of overall placement in the device and is integrated applicable to the trend of heterogeneous wireless multiple access networks in electric vehicle and Internet of Things system devices, which covered the 5G with supporting the band of n7/n38/n40/n53/n77/n78/n79/n90, the 4G with supporting the band of 7/38/40/41/42/43/48/67, the V2X and DSRC for the operating frequencies between 2500 and 5000 MHz, the Sirius/XM Radio for the operating frequencies of 2320–2345 MHz, the ISM band of WiFi and BT covering the band of 2450–2483.5 and 5150–5350 MHz, and the WiMAX also supporting the band of 2300–2690 and 3400–3690 MHz. Moreover, the compact antenna manufactured an FR4 material with the antenna area of 5 × 10 × 0.8 mm3 and the ground area of 33.5 × 10 × 0.8 mm3. The proposed design better benefits a narrow space on the PCB with a low profile and is easy to make with a circuit board design.

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A Compact Cavity-Backed Slot Antenna Using Dual Mode for IoT Applications

Cited by 25 publications

References 17 publications

On EM-Driven Size Reduction of Antenna Structures With Explicit Constraint Handling

On EM-Driven Size Reduction of Antenna Structures With Explicit Constraint Handling

Ultra‐miniaturized tunable slot‐based antenna design for 5G IoT applications

A Miniaturized Planar Monopole Antenna Based on a Coupling Structure for Compact Mobile Internet of Things (IoT) and Electric Vehicles (EVs) Device Applications in 5G, LTE, WLAN, WiMAX, Sirius/XM Radio, V2X, and DSRC Wireless Systems

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