Ceramic Superstrate-Based Decoupling Method for Two Closely Packed Antennas With Cross-Polarization Suppression

Liu, Feng; Guo, Jiayin; Zhao, Luyu; Huang, Guan‐Long; Li, Yingsong; Yin, Yingzeng

doi:10.1109/tap.2020.3016388

Cited by 102 publications

(49 citation statements)

References 29 publications

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“…For Combination A, the MC is below Table 1 shows that the proposed TPCFMAA has the minimum inter-element spacing (λ h ) except that in [25] but [25] occupies 64 times more volume (in λ 3 h ) than TPCF-MAA. The TPCFMAA has broader percentage bandwidth than [24], comparable percentage bandwidth with [7] but lesser percentage bandwidth than [8], [9], [25], [26] and [27]. However, excellent bandwidth improvements will be shown for TPDRAA employing meta-grid lines in the ground plane as discussed in section IV.…”

Section: Introductionmentioning

confidence: 93%

“…Capacitively loaded loop based MTM superstrate and metasurface (MS)-based decoupling techniques are used for isolation enhancement in [24] and [25]. The decoupling in [26] is realized by adding a pure DB above the coupled array, and a ceramic superstrate in [27]. All these four designs have decoupling structures between or above the antenna elements, which significantly increase the antenna footprint.…”

Section: Introductionmentioning

confidence: 99%

“…However, excellent bandwidth improvements will be shown for TPDRAA employing meta-grid lines in the ground plane as discussed in section IV. The TPCFMAA is a very low profile antenna which occupies 48.6, 3.95, 44, 101.6, 64, 236 and 205 times lower volume than that of [7], [8], [9], [24], [25], [26] and [27] respectively. In fact, elements of this highly compact MIMO antenna satisfy criterion (ka < 1) for electrically small antennas [35].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, elements of this highly compact MIMO antenna satisfy criterion (ka < 1) for electrically small antennas [35]. Furthermore, the TPCF-MAA design is simple, compact and especially, does not have a multi-layer arrangement contrary to the antennas of [7], [24], [25], [26] and [27] that add excess heights to these antenna profiles.…”

Section: Introductionmentioning

confidence: 99%

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Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

et al. 2022

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Traditionally used mutual coupling (MC) reduction techniques such as electromagnetic bandgap structures, isolators and neutralization lines require extra space between radiators. Besides, metamaterial-based techniques require multi-layer arrangements. However, the proposed meta-grid lines overcomes the above demerits by integrating meta-grid lines in the ground plane itself. As a proof-ofconcept, two-port CPW-fed monopole antenna array (TPCFMAA) and two-port DRA array (TPDRAA) are designed, fabricated and tested. It has been observed that the TPCFMAA has mutual coupling below -20 dB for frequency between 2.6 to 4.4 GHz. The envelope correlation coefficient reduces from 0.072 to 0.026 by integrating meta-grid lines in the ground plane of the TPCFMAA. At 3.5 GHz, the inter-element distance between the antennas is noted to be 0.015λ h (λ h = highest operating wavelength). The TPDRAA's operating frequency can be tuned by changing the parameters of the annular ring slot in the excitation patch. The bandwidth of TPDRAA can be further increased by merging the two resonances of the two annular ring slots in the excitation patch. For TPDRAA, the measured -10 dB impedance bandwidth is from 5.65 to 6.55 GHz. The mutual coupling between the antenna elements is seen to be below -16 dB for an inter-element spacing of 4.8 mm, which is 0.090λ h . The measured gain of TPDRAA within the bandwidth is from 4.17 dBi to 5.2 dBi. The TPCFMAA can be used in 3.5 GHz Internet of Vehicles (IoV) multi-user MIMO service, whereas the TPDRAA can be used for satellite communication in the 5.925 to 6.425 GHz frequency band, WiMAX in the 5.7 to 5.85 GHz band, ISM in the 5.725 to 5.85 GHz band, and WLAN in the 5.8 GHz band.INDEX TERMS MIMO antenna, CPW-fed printed monopole antenna array, Cylindrical dielectric resonator antenna (CDRA) array, Single negative (SNG) meta-grid lines.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

et al. 2022

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“…Moreover, the mutual cooling is reduced by more than −8 dB at most of the working BW after adding the spiral and the shorting pins as expected. Authors in [60][61][62][63] used similar techniques for coupling reduction. the reflection and transmission coefficients results of the antenna after all the loadings are added.…”

Section: Mimo Antenna's Radiation Characteristicsmentioning

confidence: 99%

A Bra Monitoring System Using a Miniaturized Wearable Ultra-Wideband MIMO Antenna for Breast Cancer Imaging

et al. 2021

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This paper represents a miniaturized, dual-polarized, multiple input–multiple output (MIMO) wearable antenna. A vertically polarized, leaf-shaped antenna and a horizontally polarized, tree-shaped antenna are designed, and the performance of each antenna is investigated. After designing the MIMO antenna, it is loaded with stubs, parasitic spiral, and shorting pins to reduce the coupling effects and remove the unwanted resonances. Afterward, the two-port MIMO cells are spaced by 2 mm and rotated by 90° to create three more cells. The antennas are designed using two layers of denim and felt substrates with dielectric constants of 1.2 and 1.8, and thicknesses of 0.5 mm and 0.9 mm, respectively, along with the ShieldIt™ conductive textile. The antenna covers a bandwidth of 4.8–30 GHz when the specific absorption rate (SAR) meets the 1 g and 10 g standards. Isolation greater than 18 dB was obtained and mutual coupling was reduced after integrating shorting pins and spiral parasitic loadings. A maximum radiation efficiency and directive gain of 96% and 5.72 dBi were obtained, respectively, with the relatively small size of 11 × 11 × 1.4 mm3 for the single element and final dimensions of 24 × 24 × 1.4 mm3 for the full assembly. The antenna’s performance was examined for both on-body (breast) and free space conditions using near-field microwave imaging. The achieved results such as high fidelity, low SAR, and accuracy in localization of the tumour indicate that the MIMO antenna is a decent candidate for breast cancer imaging.

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Fabrication of High Radiation Efficiency Dielectric Resonator Antenna Array Using Temperature Stable 0.8Zn₂SiO₄‐0.2TiO₂ Microwave Dielectric Ceramic

Zhou

et al. 2023

Adv Materials Technologies

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Array antenna is of great significance in realizing the Sub‐6 GHz fifth‐generation (5G) mobile communication systems, however, its utilization in the base station systems implementation is limited due to high power consumption. In this paper, a high radiation efficiency 4 × 4 cylindrical dielectric resonator antenna (CDRA) array fabricated using the temperature stable 0.8Zn2SiO4‐0.2TiO2 composite ceramic is proposed. TiO2‐doped Zn2SiO4 composite ceramics are synthesized by the conventional solid‐state method. Notably, 0.8Zn2SiO4‐0.2TiO2 composite ceramic sintered at 1250 °C demonstrates excellent microwave dielectric properties with dielectric constant (εr ≈ 8.24), high‐quality factor (Q × f ≈ 35 000@8.08GHz), and the temperature coefficient of resonant frequency (TCF ≈ +4.6 ppm °C−1). Moreover, the composite ceramic CDRA array is designed by exciting fundamental HE11δ mode using the aperture coupling microstrip feeding network. The fabricated composite ceramic based 4 × 4 CDRA array has enhanced measured radiation efficiency of up to 87%, high gain of 17.85 dBi and is a promising candidate for utilization in Sub‐6 GHz 5G Base Station communications systems.

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Ceramic Superstrate-Based Decoupling Method for Two Closely Packed Antennas With Cross-Polarization Suppression

Cited by 102 publications

References 29 publications

Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

A Bra Monitoring System Using a Miniaturized Wearable Ultra-Wideband MIMO Antenna for Breast Cancer Imaging

Fabrication of High Radiation Efficiency Dielectric Resonator Antenna Array Using Temperature Stable 0.8Zn₂SiO₄‐0.2TiO₂ Microwave Dielectric Ceramic

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Ceramic Superstrate-Based Decoupling Method for Two Closely Packed Antennas With Cross-Polarization Suppression

Cited by 102 publications

References 29 publications

Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

Space Efficient Meta-Grid Lines for Mutual Coupling Reduction in Two-Port Planar Monopole and DRA Array

A Bra Monitoring System Using a Miniaturized Wearable Ultra-Wideband MIMO Antenna for Breast Cancer Imaging

Fabrication of High Radiation Efficiency Dielectric Resonator Antenna Array Using Temperature Stable 0.8Zn2SiO4‐0.2TiO2 Microwave Dielectric Ceramic

Contact Info

Product

Resources

About

Fabrication of High Radiation Efficiency Dielectric Resonator Antenna Array Using Temperature Stable 0.8Zn₂SiO₄‐0.2TiO₂ Microwave Dielectric Ceramic