Two-Strip Narrow-Frame Monopole Antenna With a Capacitor Loaded for Hepta-Band Smartphone Applications

Chen, Zhong-Xiang; Ban, Yong-Ling; Chen, Zhi; Kang, Kai; Li, Le‐Wei

doi:10.2528/pier13112808

Cited by 10 publications

(3 citation statements)

References 21 publications

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“…Historically, antenna design has leaned heavily on intricate geometries, depending on redesigns to resonate at specific frequencies for each platform [23][24][25][26][27][28][29][30][31][32]. This presents a notable challenge for antenna designers since iterative procedures are required to optimize the antenna geometry.…”

Section: Introductionmentioning

confidence: 99%

Antenna Booster Element for Multiband Operation

García,

Andújar,

Anguera

2024

Sensors

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The escalating demand for versatile wireless devices has fostered the need to reduce the antenna footprint to support the integration of multiple new functionalities. This poses a significant challenge for the Internet of things (IoT) antenna designers tasked with creating antennas capable of supporting multiband operation within physical constraints. This work aims to address this challenge by focusing on the optimization of an antenna booster element to achieve multiband performance, accomplished through the design of a band-reject filter. This proposal entails a printed circuit board (PCB) measuring 142 mm × 60 mm, with a clearance area of 12 mm × 40 mm, incorporating an antenna booster element of 30 mm × 3 mm × 1 mm (0.07 λ). This configuration covers frequencies in the LFR (low-frequency range) from 698 MHz to 960 MHz and the HFR (high-frequency range) from 1710 MHz to 2690 MHz. A theoretical analysis is conducted to optimize bandwidth in both frequency regions. Finally, a prototype validates the analytic results.

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Section: Introductionmentioning

confidence: 99%

Antenna Booster Element for Multiband Operation

García,

Andújar,

Anguera

2024

Sensors

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“…Besides off-the-shelf antenna components, a miniature size and multiband performance are two other demanding requirements for wireless antenna systems. Common techniques to design small and multiband antennas for wireless devices rely on complex geometries, where the several resonant modes of the antenna determine the frequency bands of operation [1][2][3][4][5][6][7][8][9][10][11]. On the one hand, this procedure requires a high level of expertise to shape the antenna geometry correctly and achieve acceptable behavior to operate at the frequency bands of interest.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Multiband Operation for Wireless Devices Embedding Antenna Boosters

Anguera

Andújar²,

Leiva³

et al. 2021

Electronics

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Wireless devices such as smart meters, trackers, and sensors need connections at multiple frequency bands with low power consumption, thus requiring multiband and efficient antenna systems. At the same time, antennas should be small to easily fit in the scarce space existing in wireless devices. Small, multiband, and efficient operation is addressed here with non-resonant antenna elements, featuring volumes less than 90 mm3 for operating at 698–960 MHz as well as some bands in a higher frequency range of 1710–2690 MHz. These antenna elements are called antenna boosters, since they excite currents on the ground plane of the wireless device and do not rely on shaping complex geometric shapes to obtain multiband behavior, but rather the design of a multiband matching network. This design approach results in a simpler, easier, and faster method than creating a new antenna for every device. Since multiband operation is achieved through a matching network, frequency bands can be configured and optimized with a reconfigurable matching network. Two kinds of reconfigurable multiband architectures with antenna boosters are presented. The first one includes a digitally tunable capacitor, and the second one includes radiofrequency switches. The results show that antenna boosters with reconfigurable architectures feature multiband behavior with very small sizes, compared with other prior-art techniques.

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“…However, narrow-bandwidth characteristic of individual mode is one of the limitations for PIFA, and its 3D structure may be a fabrication challenge [4]. Numerous techniques for multiband planar monopole antenna design have been presented in literature, e.g., Land U-shaped slots [5], an additional strip [6], multiresonator-loaded structures including a pair of symmetrical edge resonators and a T-shaped stub resonator [7], U-shaped slot with paper substrate [8], dual inverted L-shaped strips [9], two spiral ring strips [10], a modified fork-shaped strip [11], a chopped circular radiator appended with a meander line and an L-strip coupled element [12], a slot-ring antenna with single-and dual-capacitive coupled patch [13], a rhombic patch with modified minkowski fractal geometry [14], and a two-strip monopole loaded with a chip capacitor and an L-shape high-pass filter [15]. However, design of a compact multiband monopole antenna with sufficient bandwidth at three frequency bands remains a challenge.…”

Section: Introductionmentioning

confidence: 99%

Multiband and Wideband Planar Antenna for Wlan and Wimax Applications

Dong¹,

Liao²,

Xu³

et al. 2014

PIER Letters

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Abstract-In this paper, the design of a multiband antenna for WLAN and WiMAX applications is proposed. The proposed antenna comprises a circular radiating patch with a pair of rectangular slits and an inverted U-shaped slot. A hexagon-shaped slot is cut on the ground plane. By adjusting the inverted U-shaped slot, a pair of rectangular slits, and a hexagon-shaped slot, three distinct resonance frequencies centered at 2.4 GHz, 3.52 GHz, and 5.68 GHz can be generated. The measurements show that the proposed antenna can cover three frequency bands with sufficient bandwidth. The proposed antenna exhibits an omnidirectional radiation pattern and acceptable gain. The overall dimension of the proposed antenna is 25 × 39 × 1.59 mm 3 .

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Two-Strip Narrow-Frame Monopole Antenna With a Capacitor Loaded for Hepta-Band Smartphone Applications

Cited by 10 publications

References 21 publications

Antenna Booster Element for Multiband Operation

Antenna Booster Element for Multiband Operation

Reconfigurable Multiband Operation for Wireless Devices Embedding Antenna Boosters

Multiband and Wideband Planar Antenna for Wlan and Wimax Applications

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