Dual-Band Circular-Polarized Microstrip Antenna for Ultrawideband Positioning in Smartphones With Flexible Liquid Crystal Polymer Process

Zhang, Yongjian; Li, Yue; Hu, Mingzhe; Wu, Pengfei; Wang, Hanyang

doi:10.1109/tap.2023.3247130

Cited by 25 publications

(3 citation statements)

References 36 publications

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“…Te introduction of a C-shaped structure, which is independent of both the feed line and the radiating element (as opposed to the concept in [20,21], which uses a via connection between diferent layers), reveals a remarkable split-bandwidth capability. Tis innovative design represents a signifcant leap forward in antenna technology.…”

Section: Te Impact Of the Novel Split Bandwidthmentioning

confidence: 99%

Triple-Band MIMO Antenna for 5 G Terminals

Ghiat,

Tribak,

Terhzaz

et al. 2024

International Journal of Antennas and Propagation

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In this work, a triple-band, four-element antenna is designed for fifth-generation (5 G) terminals operating in LTE band 42 (3.4–3.6 GHz), LTE band 43 (3.6–3.8 GHz), and the new 5 G radio band (4.8–5.0 GHz). The proposed antenna array consists of two different types of antenna elements: a T-shaped element, which is connected to the feed line, and a C-shaped element, which is used to divide the bandwidth. The overall size of the proposed antenna element is only 10.5 mm × 5 mm. The multiantenna system has four antennas and is built on a 0.5-mm-thick Rogers 4003C substrate. The results for this antenna show a 10 dB measured bandwidth of 650 MHz at the center frequency of 3.6 GHz and 230 MHz at 4.9 GHz, a gain of more than 4 dBi, an isolation of more than 14 dB, and an overall radiation efficiency of more than 82%.

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Section: Te Impact Of the Novel Split Bandwidthmentioning

confidence: 99%

Triple-Band MIMO Antenna for 5 G Terminals

Ghiat,

Tribak,

Terhzaz

et al. 2024

International Journal of Antennas and Propagation

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“…For swept antennas, the bandwidth is expressed as a percentage of the frequency difference (top minus bottom) relative to the center frequency of the passband. For example, a bandwidth of 5% indicates that the frequency difference of acceptable performance is 5% of the center frequency of the bandwidth (Ozpinar et al, 2020;Yongjian et al, 2023).…”

Section: A Features Of Microstrip Antennasmentioning

confidence: 99%

Optimization of Broadband Microstrip Antenna Device for 5G Wireless Communication Systems

Islamov

2023

Transport and Telecommunication Journal

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The paper proposes a new method for finding the optimal design of complementary split ring resonator cells for a microstrip antenna, which makes it possible to purposefully optimize the parameters of resonator cells, which significantly improve the electrical characteristics of the antenna. This antenna is designed for cellular communication 5G. The proposed method combines a regression model using a deep network based on fully connected neural layers with a search based on the conditional optimization algorithm COBYLA to find the optimal design parameters of resonator cells. This approach fully automates the process of creating microstrip antennas with resonator cells based on metamaterials and makes it possible to find the parameters of complementary split ring resonator cells that provide the optimal operating mode as a whole and gives the maximum level of antenna radiation while maintaining the bandwidth. The small size of complementary split ring resonator cells opens up the possibility of using this peculiar configuration to create compact and efficient microstrip antennas.

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“…One is that the element itself is circularly polarized, such as unequal length crossed dipole [14] and chamfered patch [15], etc. The other is to use the feeding circuit [16], [17], [18]to generate the phase difference required for CP. Many CP antennas in the form of line arrays have been studied.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a Circularly Polarized Log-Periodic Dipole Antenna

Wei,

Zhang,

Sun

et al. 2024

IEEE Open J. Antennas Propag.

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In this letter, a circularly-polarized (CP) log-periodic dipole antenna (LPDA) is investigated. Eight crossed dipole cells with a logarithmically increased λ/8 separation are employed to form the proposed CP LPDA. The dipoles with increased length and spacing are fed in series by an air-filled parallel line. The working mechanism of the generation of back-fire CP radiation is illustrated by an array analyzation. Besides, the LPDA design factors for both polarizations are analyzed in detail to realize an optimized CP performance. To validate the performance of the proposed eight-element CP LPDA, a prototype was fabricated and measured. The measured axial ratio (AR) bandwidth (0.8-2.5 GHz) is coincident with the impedance bandwidth (0.8-2.43 GHz), and it can be further increased with more elements. The overlapping bandwidth with VSWR < 2, AR < 3 dB, gain variation < 3 dB, and back-fire gain > 5 dBic is 0.94-2.43 GHz (2.6:1), and the radiation pattern is stable across the entire band.INDEX TERMS Circularly-polarized (CP), frequency independent, log-periodic dipole antenna (LPDA), wideband.L

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Dual-Band Circular-Polarized Microstrip Antenna for Ultrawideband Positioning in Smartphones With Flexible Liquid Crystal Polymer Process

Cited by 25 publications

References 36 publications

Triple-Band MIMO Antenna for 5 G Terminals

Triple-Band MIMO Antenna for 5 G Terminals

Optimization of Broadband Microstrip Antenna Device for 5G Wireless Communication Systems

Investigation of a Circularly Polarized Log-Periodic Dipole Antenna

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