A Method of Suppressing Higher Order Modes for Improving Radiation Performance of Metasurface Multiport Antennas Using Characteristic Mode Analysis

Lin, Feng Han; Chen, Zhi Ning

doi:10.1109/tap.2018.2806401

Cited by 156 publications

(52 citation statements)

References 41 publications

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“…Detailed implementation is illustrated in a numerical example in section 3. It shows that when this operation, as was similarly implemented in some previous work (e.g., Lin & Chen, 2015), is naturally introduced in the feed design, the required feed numbers are readily reduced.…”

Section: Shape Modification Modulementioning

confidence: 77%

An Eigenmode Correlation‐Based Algorithm for Approaching Antenna Optimal Currents With Multiple Feeds

Zhang

Wang

et al. 2020

Radio Science

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A feeding algorithm has been proposed for the excitation of the optimal electric current of Rayleigh quotient form optimization problems. Modal weighting coefficients of the corresponding generalized eigenvalue problem are calculated to form the correlation information between the desired and all other unwanted modes. Based on this information, multiple feeds are arranged to approximate the desired current distributions. The eigencurrent distribution is also utilized for some shape modification to the radiator for a possible feed number reduction. Three canonical optimization problems for electrically small antennas, minimum Q, maximum G/Q, and maximum G are studied and discussed. Several numerical examples with a certain arbitrary shape and electrical size are given. With the proposed feeding algorithm, calculated and simulated current distributions and performance indices are close to the theoretical optimum solution. Finally, a practical feeding network design for a classic characteristic mode problem is shown as a validation.

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Section: Shape Modification Modulementioning

confidence: 77%

An Eigenmode Correlation‐Based Algorithm for Approaching Antenna Optimal Currents With Multiple Feeds

Zhang

Wang

et al. 2020

Radio Science

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“…This MIMO configuration has an isolation of 20 dB with more than 85% efficiency in the entire UWB band. The metamaterial (MTM) loaded UWB antenna system design is a novel approach to obtain a high gain, improved radiation performance, and large bandwidth with miniaturized antenna size [28,29]. A compact printed monopole antenna integrated with a single negative metamaterial is proposed in [28].…”

Section: Introductionmentioning

confidence: 99%

Eight-Port Metamaterial Loaded UWB-MIMO Antenna System for 3D System-in-Package Applications

et al. 2020

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In this article, an eight-element ultra-wideband (UWB) Multiple-Input-Multiple Output (MIMO) antenna system is proposed for 3D non-planar applications. The proposed UWB-MIMO antenna is installed around a polystyrene block in the 3D-octagonal arrangement. The eight radiating elements are placed on the sides of the octagonal polystyrene block with top and bottom surfaces left open. The single antenna element consists of a modified Y-shaped radiating patch, epsilon-negative (ENG) metamaterial, and a partial ground plane. A modified pie-shaped decoupling structure is deployed at the backside of the radiating patch to improve the isolation among array elements. Each antenna element is printed on a low-cost FR-4 substrate with dimensions of 28 mm × 23 mm with coverage of the whole UWB spectrum from 3.1 to 10.6 GHz frequency band. The eight-port UWB-MIMO antenna system consists of symmetric and nonsymmetric array configurations. Simulated and measured MIMO performance parameters i.e. Channel Capacity Loss (CCL) < 0.35, Envelope Correlation Coefficient (ECC) < 0.0025 and Total Active Reflection Coefficient (TARC) <-11 dB are in acceptable limits for both symmetric and non-symmetric configurations. The proposed MIMO antenna system is suitable for 3D system-in-package, indoor localization systems, and wireless personal area network applications in industries where multiple machines are connected to a central server wirelessly through such kinds of antennas in a rich scattering environment.

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“…In [18], CMA was first used to analyze metasurface, and multiple modes were excited simultaneously to achieve broadband. Soon after, CMA was successfully used to solve the coupling problem of metasurface multiport antennas and improved the problem of pattern distortion [19]. With the help of CMA, the resonant frequencies of different modes for metasurface were independently controlled for dual-band 5G applications [20].…”

Section: Introductionmentioning

confidence: 99%

Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis

Han

Dou

2019

IEEE Access

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This paper presents the design process of a clock-shaped broadband circular polarized (CP) antenna based on Characteristic Mode Analysis (CMA). It is composed of a circular ring, two microstrip lines approximately perpendicular to each other, and 50-improved coplanar waveguide (CPW). The two microstrip lines are introduced in the X and Y directions, respectively, to break the symmetry for CP operation. Different from the conventional method in which the operation is verified by the simulated surface current distribution, CMA provides physical insight into different modes of the antenna and reveals the mechanism of radiating CP wave. Mode currents and characteristic fields of the selected modes are studied for AR bandwidth enhancement. An improved double-sided printed CPW is introduced to excite the desired modes and achieve wideband impedance matching. To validate the proposed concept, a prototype with a compact size of 0.29λ L × 0.29λ L × 0.013λ L (λ L corresponding to the maximum operation frequency) is fabricated and measured. The measured −10 dB impedance bandwidth and 3 dB AR bandwidth are 84.6% from 2.38 GHz to 5.8 GHz and 43.4% from 2.4 GHz to 3.73 GHz, respectively. The overlapping operating bandwidth can cover the ISM band, the TD-LTE band, and the WiMAX band. Besides, the proposed antenna has a stable radiation pattern over the operating band. INDEX TERMS Broadband antennas, characteristic mode analysis (CMA), circular polarization (CP), co-planar waveguide (CPW).

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A Method of Suppressing Higher Order Modes for Improving Radiation Performance of Metasurface Multiport Antennas Using Characteristic Mode Analysis

Cited by 156 publications

References 41 publications

An Eigenmode Correlation‐Based Algorithm for Approaching Antenna Optimal Currents With Multiple Feeds

An Eigenmode Correlation‐Based Algorithm for Approaching Antenna Optimal Currents With Multiple Feeds

Eight-Port Metamaterial Loaded UWB-MIMO Antenna System for 3D System-in-Package Applications

Compact Clock-Shaped Broadband Circularly Polarized Antenna Based on Characteristic Mode Analysis

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