A new dual‐band microstrip antenna array with high isolation by waveguided metamaterial structure

Guo, Chaozong; Zhai, Huiqing; Liu, Sui‐Bin

doi:10.1002/mop.31707

Cited by 14 publications

(3 citation statements)

References 13 publications

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“…Te frst step is to design the decoupling unit WCSRRs on the basis of waveguide and complementary split ring resonators (CSRR), and propose the microstrip antenna array with WCSRRs by EM simulation; the second step is to optimize and predict the geometry parameters of the proposed array by FCNN. Diferent from the existing waveguided decoupling studies [22], the proposed WCSRRs cover the central substrate of the array directly to suppress the mutual coupling and improve the isolation of the microstrip antenna array. To optimize the proposed array with WCSRRs when the distance between patches is further reduced, we use FCNN to learn the relationship between array geometry and EM response, and to predict the optimal geometry of the proposed array for on-demand isolation requirement.…”

Section: Introductionmentioning

confidence: 99%

Two-Step Decoupling Design of a Microstrip Antenna Array by Using Waveguided Complementary Split-Ring Resonators and a Fully Connected Neural Network

Zhou

Mei

et al. 2023

International Journal of Antennas and Propagation

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To suppress the mutual coupling between closely-spaced patches, we propose a two-step decoupling design approach for a microstrip antenna array with the dimensions of 44.9 × 30.495 mm2. The first step is designing a decoupling unit on the basis of waveguided complementary split-ring resonators (WCSRRs) to improve isolation. The second step is presenting an optimization method by using a fully connected neural network (FCNN) to enhance design efficiency. By inserting WCSRRs structure between two patches with the edge-to-edge distance of 0.24λ0 (port-to-port distance with 0.66λ0), where λ0 is the wavelength of free space at a resonant frequency of 9 GHz, the mutual coupling can be reduced to −29.38 dB, which is confirmed by the EM simulation. We use the simulation results of the array geometries and EM performances to train FCNN at first and then use the trained FCNN to predict the array geometric parameters for the optimal EM response when the edge-to-edge distance between patches is further reduced to 0.21λ0 and 0.18λ0 (port-to-port distance reduced to 0.60λ0 and 0.56λ0). The measured isolation of the predicted microstrip antenna array is increased to 41.05 dB and 52.33 dB, respectively. Compared to the EM simulation, our FCNN approach has a higher accuracy and lower computational complexity. Therefore, the proposed array predicted by FCNN has a better decoupling performance. All the simulated and predicted results are validated via the measurement to demonstrate the effectiveness of our design scheme. The advantages of our work include the good decoupling performance of the proposed WCSRRs and the convenient optimization of the FCNN from physical response to optimal antenna array geometry design.

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Section: Introductionmentioning

confidence: 99%

Two-Step Decoupling Design of a Microstrip Antenna Array by Using Waveguided Complementary Split-Ring Resonators and a Fully Connected Neural Network

Zhou

Mei

et al. 2023

International Journal of Antennas and Propagation

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“…Some dual-band MIMO antenna designs have been reported in the literature, but they also have some limitations. 11,[15][16][17][18][19][20][21][22][23][24] For example, one method of decoupling is to reduce the size of the coupling through metamaterials, such as electromagnetic band gap (EBG) 15 or waveguide metamaterials (WG-MTM), 16 and so forth. However, these structures are too large for mobile phone antennas.…”

Section: Introductionmentioning

confidence: 99%

A dual‐band tightly arranged multiple‐input multiple‐output antenna pair for 5G mobile terminals

Li,

Zhao,

Huang

et al. 2023

Micro & Optical Tech Letters

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This paper presents a dual‐band multiple‐input multiple‐output (MIMO) antenna pair for 5G cell phones. The antenna pair consists of two planar concave antenna elements that are tightly arranged on a vertical substrate. By adding capacitors to form a resonant network, an additional operating mode is excited, resulting in dual‐band performance. The resonant frequency of the additional mode can be adjusted independently by changing the capacitance value. Moreover, a neutralization line is used to improve the isolation of the high band without affecting the low band. The antenna pair occupies a small area of 13.2 × 6.3 mm2 and operates at both 3.5 and 4.85 GHz bands. The isolations are better than 17 dB at the 3.5 GHz band and better than 19 dB at the 4.85 GHz band. The proposed dual‐band antenna pair might be a good choice for 5G terminals.

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“…In Reference 12, a decoupling technique based on a closed‐decoupling‐loop which works as a half‐wavelength loop‐type resonator leads to a good isolation even when the antenna elements are very close. The isolation can also be enhanced by using the defected ground planes, 13,14 neutralization line (NL) structure, 15 electromagnetic band‐gap (EBG), 16 and metamaterials 17 . Some orthogonally placed antennas have been proposed, such as orthogonal polarizations antenna, 18 and circularly polarized MIMO antenna 19 …”

Section: Introductionmentioning

confidence: 99%

A compact planar dual band two‐port MIMO antenna with high isolation and efficiency

Dong

Huang

Chen

et al. 2022

Int J RF Mic Comp-Aid Eng

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A dual-band two-port MIMO antenna with high isolation and efficiency is proposed in this article. Each antenna element is composed of a rotated U-shaped strip and an L-shaped strip. The MIMO antenna is optimized to operate in 2.5-2.7 GHz and 4.8-5 GHz, which can cover the 5G bands of China Mobile. The defected ground structure consists of a slant square loop with a T-shaped slit and a U-shaped slot. A rectangle parasitic strip is placed in the U-shaped slot. The use of defected ground structure and parasitic strip makes the antenna obtain good isolation which is better than À17.96 dB and À 20.1 dB at the lower and higher frequency bands. To evaluate the antenna diversity, envelope correlation coefficient (ECC) is analyzed which is lower than 0.0006 and 0.12 at the lower and higher frequency bands, respectively. The measured gains are 4.35 dBi and 4.6 dBi, while the measured efficiencies are 63.23% and 68.69% at 2.6 GHz and 4.9 GHz, respectively. The prototype of antenna is fabricated to verify the functioning of proposed antenna design.

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A new dual‐band microstrip antenna array with high isolation by waveguided metamaterial structure

Cited by 14 publications

References 13 publications

Two-Step Decoupling Design of a Microstrip Antenna Array by Using Waveguided Complementary Split-Ring Resonators and a Fully Connected Neural Network

Two-Step Decoupling Design of a Microstrip Antenna Array by Using Waveguided Complementary Split-Ring Resonators and a Fully Connected Neural Network

A dual‐band tightly arranged multiple‐input multiple‐output antenna pair for 5G mobile terminals

A compact planar dual band two‐port MIMO antenna with high isolation and efficiency

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