Phase Compensation for Decoupling of Large-Scale Staggered Dual-Polarized Dipole Array Antennas

Wei, Changning; Zhang, Zhenyuan; Wu, Ke-Li

doi:10.1109/tap.2019.2955166

Cited by 46 publications

(28 citation statements)

References 25 publications

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“…І, the proposed DDS can achieve below -25 dB mutual couplings for antenna elements with the smallest inter-element distance in the lowest complexity configuration. The bandwidth of the proposed antenna array with the mutual coupling below -25 dB is 12.8%, which is much wider than the results in [17], [20], and is comparable with the bandwidth in [21] and [22]. Since the height of the dielectric stub is closely related to the decoupling performance of the proposed DDS, the profile of the proposed decoupling method is indeed higher than that in [17] and [20], but is comparable with the height in [21], [22] that an air separation between the ADS and the metal ground is needed.…”

Section: B Radiation Patterns Realized Gains and Total Efficienciesmentioning

confidence: 52%

“…A surface with certain metal patterns is located above the antenna array to introduce additional reflected waves to cancel the space wave coupling in free space. The decoupling effects of ADS for large-scale and dual-polarized antennas have been improved with phase compensation as reported in [22]. The key for a good ADS is to optimize its reflection phases to make them cope with the phases of the direct couplings to achieve a significant coupling reduction.…”

Section: Introductionmentioning

confidence: 99%

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Decoupling of a Wideband Dual-Polarized Large-Scale Antenna Array With Dielectric Stubs

Mei

Zhang

2021

IEEE Trans. Veh. Technol.

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A technique of decoupling dielectric stubs (DDS) is proposed for mutual coupling reduction of wideband, dualpolarized, and large-scale antenna arrays in this paper, where a low dielectric constant DDS is mounting on a dual-polarized and wideband antenna array seamlessly. The decoupling mechanism of the proposed DDS is qualitatively explained. By properly optimizing the dielectric constant and dimensions of the dielectric stubs, the DDS can reduce the mutual couplings between array elements efficiently. The dielectric stubs are considered as perturbations to slightly localize the electromagnetic fields radiated from the antenna element to lower the space wave coupling. The advantages of the proposed decoupling technique are wideband, low cost, high efficiency, and suitable for large-scale antenna arrays. For demonstration, 4 × 4 dual-polarized and wideband antenna arrays with and without the DDS are simulated, measured, and compared. The simulated results show that the antenna array with the DDS can achieve all port-to-port isolations over 25 dB from 4.4 to 5.0 GHz for all the coupling paths, which are 7 dB higher than the counterparts without the DDS. Moreover, the total efficiencies of the antenna elements with the proposed DDS are also improved. The measured results agree well with the simulated, verifying the effectiveness of the proposed method of DDS for decoupling of large-scale antenna arrays.

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Section: B Radiation Patterns Realized Gains and Total Efficienciesmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Decoupling of a Wideband Dual-Polarized Large-Scale Antenna Array With Dielectric Stubs

Mei

Zhang

2021

IEEE Trans. Veh. Technol.

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“…To explain the compensation mechanism, the magnitude and phase balances of E‐plane coupling (S 48 ) are calculated based on 22 :

Magnitude balance : (||, S_{ij}^{decoup} goodbreak- S_{ij}^{coup}) goodbreak- (||, {normalS}_{italicij}^{coup}) goodbreak= 0,

Phase balance : ∠ ((), S_{ij}^{decoup} goodbreak- S_{ij}^{coup}) goodbreak- ∠ ((), {normalS}_{italicij}^{coup}) goodbreak= normalπ,

where

S_{ij}^{coup}

and

S_{ij}^{decoup}

are the coupled (i.e., cases 1) and decoupled (i.e., cases 2–5) transmission coefficients between i th and j th ports.

((), S_{ij}^{decoup} - S_{ij}^{coup})

represents the reflected wave received by the unexcited antenna element.…”

Section: Decoupling Of a 5‐element Hb Staggered Dipole Antenna Arraymentioning

confidence: 99%

“…To explain the compensation mechanism, the magnitude and phase balances of E-plane coupling (S 48 ) are calculated based on 22 :…”

Section: Contradiction Between Antenna Decoupling and Matching In Sin...mentioning

confidence: 99%

“…To achieve in-band decoupling (IBD), it is intuitive to insert a band-stop FSS wall between antennas, 16,17 or arrange a single-negative metasurface above antennas. [18][19][20][21] Besides, over-the-air coupling can be canceled out by loading antenna decoupling surface (ADS), 22,23 dielectric superstrate [24][25][26][27][28] or parasitic structures, 29 since they introduce an additional coupling path with equal magnitude and opposite phase.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band stacked base station antenna array with high isolation

Chu

2022

Int J RF Mic Comp-Aid Eng

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A high‐isolation dual‐band base station antenna array is proposed. At first, a 5‐element high‐band (HB) dipole antenna array with inter‐element distance of 0.4 λH0 (the free‐space wavelength at the center frequency of the HB) is decoupled. With the main antenna decoupling surface (ADS), metal baffles and auxiliary ADS, the E‐plane and H‐plane couplings can be reduced to <−23.1 dB (<−11.4 dB without decoupling) and <−22.6 dB (<−14.8 dB without decoupling), respectively. The dual‐layer ADS design successfully resolves the contradiction between decoupling performance and matching. The ground plane of the 5‐element array is then exploited as the low‐band patch radiator, forming the proposed dual‐band antenna array. Measured results show that satisfactory cross‐band isolation (>33.1 dB), in‐band isolation (>22.2 dB) and polarization isolation (>30 dB) are obtained. Stable unidirectional radiation patterns are also acquired.

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Design of compact dual‐polarized base station antenna array with high isolation using array decoupled surface and parasitic patch structure

et al. 2022

Int J RF Mic Comp-Aid Eng

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For a compact base station antenna array, the isolation between two co-polarized adjacent elements and two cross-polarized adjacent elements is relatively poor. The introduction of the array decoupled surface (ADS) on the top of the antenna and the introduction of parasitic structures between adjacent elements effectively improve the isolation of the co-polarized and cross-polarized adjacent elements. Array decoupled surface mainly suppresses the mutual coupling between the co-polarized adjacent elements, and the parasitic structure mainly suppresses the mutual coupling between the crosspolarized adjacent elements. Both simulated and measured results show that in the 3.3-3.6 GHz band, the return loss of all ports is better than 10 dB. By introducing the ADS and the parasitic patch structure, the isolation between two co-polarized adjacent elements is improved from about 15 to 21.9 dB, and the isolation between two cross-polarized adjacent elements is improved from about 13 to 22.4 dB. The isolation between two cross-polarized elements in the same unit is greater than 27 dB.

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Phase Compensation for Decoupling of Large-Scale Staggered Dual-Polarized Dipole Array Antennas

Cited by 46 publications

References 25 publications

Decoupling of a Wideband Dual-Polarized Large-Scale Antenna Array With Dielectric Stubs

Decoupling of a Wideband Dual-Polarized Large-Scale Antenna Array With Dielectric Stubs

Dual‐band stacked base station antenna array with high isolation

Design of compact dual‐polarized base station antenna array with high isolation using array decoupled surface and parasitic patch structure

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