Aircraft-Integrated VHF Band Antenna Array Designs Using Characteristic Modes

Wang, Chenghui; Chen, Yikai; Guo, Liu; Yang, Shiwen

doi:10.1109/tap.2020.2997468

Cited by 14 publications

(5 citation statements)

References 39 publications

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“…In this case, the complexity of traditional synthesis methods can be reduced by making full use of the orthogonality of the characteristic fields. For instance, in [55], the orthogonality of the characteristic fields was used to avoid the time-consuming matrix inversion in the least squares pattern synthesis method. Another approach is to directly synthesize a specific number of CMs of the radiators without considering the feeding position, and the feeding position is subsequently according to the synthesized modal current distribution [56]- [61].…”

Section: Pattern Optimization and Synthesismentioning

confidence: 99%

Characteristic Mode Analysis: Application to Electromagnetic Radiation, Scattering, and Coupling Problems

et al. 2023

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Recent years, the theory of characteristic modes has emerged as a powerful analysis technique in antenna engineering, providing a means to reveal the natural resonant properties of objects and providing a variety of modal parameters. Based on these modal parameters, advanced techniques have been developed based on the theory of characteristic modes to address a wide range of electromagnetic radiation, scattering, and coupling problems. This review provides an overview of some of the latest characteristic mode-based techniques for wideband design, circular polarization, radiation pattern control, scattering control, and mutual coupling control. In addition, future perspectives are discussed, highlighting the potential of characteristic modes for addressing even more complex electromagnetics problems.

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Section: Pattern Optimization and Synthesismentioning

confidence: 99%

Characteristic Mode Analysis: Application to Electromagnetic Radiation, Scattering, and Coupling Problems

et al. 2023

Self Cite

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“…According to ( 6) and ( 7), it can be seen that the value of the mode weight coefcient c N depends on the mode excitation coefcient ME N and the mode signifcance MS N . Only when these two coefcients are both large, the mode weight coefcient can be guaranteed to be large so that the corresponding mode becomes the signifcant mode that dominates the actual induced current [20]. According to the expression of the mode excitation coefcient ME N , it can be known that its value depends on the value of the inner product between the external excitation E i (r) and the characteristic mode current J → N , that is, the degree of coupling between the two.…”

Section: Te Solution Of Expansion Coefcients For Characteristicmentioning

confidence: 99%

Analysis of Induced Current on Power Transmission Lines for the Reradiation Interference in Medium Wave Based on Characteristic Modes

Tang

Yang

Zhang³

et al. 2022

International Journal of Antennas and Propagation

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The reradiation interference from power transmission lines (PTL) on the adjacent wireless stations is directly caused by the induced current on metal parts, which means the interference could be suppressed by reducing the induced current. In order to effectively analyze the induced current of PTL, a method for analyzing induced current on PTL based on characteristic modes is proposed combining MoM with intrinsic modes. This method breaks through the traditional antenna resonance theory proposed by IEEE and could effectively avoid model equivalent defects and frequency limitations of traditional methods. Firstly, a generalized characteristic equation about the characteristic mode currents of PTL is constructed, and the numerical solutions of the characteristic mode currents are obtained by the idea of a discrete solution. Then, through the weighted orthogonal relationship between different characteristic mode currents, the expansion coefficients of the characteristic mode currents are obtained; finally, combined with the Poynting theorem, the physical meaning of the expansion coefficients and their related quantities are explained from the perspective of energy and the analysis of the induced current is realized from the physical level. The results of the example analysis show that the error between the peak frequencies of the induced current calculated by the method in this paper and the peak frequencies calculated by MoM does not exceed 2.46% and the method in this paper can well explain the disappearance of the “double wavelength loop resonance frequency” under the excitation of a vertically polarized plane wave.

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“…Ma et al evoked the CMA approach to utilize the characteristic modes of an airplane model to design a direction-finding antenna array operating at the HF band [34]. Wang et al, also employed CMA to design a VHF aircraftintegrated antenna array with switchable beams [35]. However, utilizing the aircraft frame as an antenna is not the goal of this analysis.…”

Section: Introductionmentioning

confidence: 99%

Characteristic Mode Analysis Prediction and Guidance of Electromagnetic Coupling Measurements to a UAV Model

et al. 2022

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In this work, we study the current coupled to a simplified Unmanned Aerial Vehicle (UAV) model using a dual computational and experimental approach. The simplified surrogate structure reduced the computational burden and facilitated the experimental measurement of the coupled currents. For a practical system, a wide range of simulations and measurements must be performed to analyze the induced current variations with respect to properties of the incident excitation waveform such as the frequency, angle of incidence, and polarization. To simplify this analysis, Characteristic Mode Analysis (CMA) was used to compute the eigen-currents of the UAV model and predict where and under which RF excitation conditions the coupled current is maximized. We verified these predictions using direct experimental measurement of the coupled currents. The presented simulations and measurements show the usefulness of CMA for studying electromagnetic coupling to practical systems.

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Aircraft-Integrated VHF Band Antenna Array Designs Using Characteristic Modes

Cited by 14 publications

References 39 publications

Characteristic Mode Analysis: Application to Electromagnetic Radiation, Scattering, and Coupling Problems

Characteristic Mode Analysis: Application to Electromagnetic Radiation, Scattering, and Coupling Problems

Analysis of Induced Current on Power Transmission Lines for the Reradiation Interference in Medium Wave Based on Characteristic Modes

Characteristic Mode Analysis Prediction and Guidance of Electromagnetic Coupling Measurements to a UAV Model

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