Beam Pattern Analysis of Antenna Array on Complex Platform Using AEP Method Based on Hybrid UTD-ACGF Technique

Kim, Young Dam; Yi, Dong-Woo; Yang, Soo Hyung; Chae, Heeduck; Yu, Je-Woo; Myung, Noh‐Hoon

doi:10.1109/tap.2016.2647722

Cited by 14 publications

(18 citation statements)

References 24 publications

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“…This approach was applied there with experimental and numerical results to conformal microstrip antenna arrays, which also involve composite PEC-dielectric objects. Finally, we mention also some hybrid methods involving a combination of hybrid ACGF and physical optics approach as in [21,22]. To summarize, aside from direct lab measurement of the ACGF itself (not realized yet), so far four different numerical methods have been used to implement the ACGF technique:…”

Section: Discussion Of the Results And Further General Remarksmentioning

confidence: 99%

“…(36) where (18), (22), (23), (31) are used. The integral (35) is in fact a global integral defined over the entire surface S. It is originally written in terms of the local coordinates ϕ i on the patch U i .…”

Section: Exact Derivation Of the Generalized Acgf Tensor Array In Minmentioning

confidence: 99%

“…This formulation is more natural because it allows a uniform treatment of a wider class electromagnetic problems as input-output systems with the same signal type present at both the excitation and response "terminals": i.e., electromagnetic fields [1]. Applications of the ACGF method in engineering spans topics like mutual coupling analysis [17], mutual coupling compensation [18][19][20], fast EM computation of large system [21][22][23], alternative methods to compute the near-field response [24], and wireless communications [25][26][27] (more applications are discussed in [1].) Most research has been focusing so far on applications with little emphasis on the theoretical, physical, and mathematical foundations, especially for general radiating systems.…”

Section: Introductionmentioning

confidence: 99%

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Generalized Current Green's Function Formalism for Electromagnetic Radiation by Coupled Conducting-Dielectric Systems

Mikki¹

2020

Preprint

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Section: Discussion Of the Results And Further General Remarksmentioning

confidence: 99%

Section: Exact Derivation Of the Generalized Acgf Tensor Array In Minmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Generalized Current Green's Function Formalism for Electromagnetic Radiation by Coupled Conducting-Dielectric Systems

Mikki¹

2020

Preprint

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“…Therefore, when two antennas (Tx and Rx) are placed next to each other, the individual Tx and Rx ACGFs used in formulae like those to be derived in this paper already account in full for the impact of mutual coupling between antennas, regardless to separation and distance between the coupled elements. This was demonstrated by good computational and experimental results in works like [14,15,20,21,25], mostly in the frequency domain; while some results in the time domain were given in [18,19], more data will be provided in §4a.The purpose of the present work is to explore several applications of the recently introduced ACGF approach [7-25] for communication systems research at a very general and fundamental level. The intention here is investigating new methods for performing wireless communication when the impact of the antenna on the digital link performance is explicitly taken into account.…”

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confidence: 95%

The antenna spacetime system theory of wireless communications

Mikki

2019

Proc. R. Soc. A.

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A general deterministic spacetime system theory of antennas suitable for the analysis and design of wireless communication links is rigorously developed using the recently introduced antenna current Green's function formalism. We provide the first complete derivation of the antenna spatio-temporal response to a delta source using only electromagnetic Green's functions, effectively eliminating all field and current distributions in the final expressions. While the theory works well in both space and time, it puts into sharper focus how the spatio-temporal structure of electromagnetic processes imposes restrictions on the signal processing capabilities of antenna systems by constraining the allowable mathematical form of the effective impulse response of the global wireless communication link. It is shown that the antenna current Green's functions of both the receive and transmit terminals, plus the propagation environment Green's functions, are the only quantities needed to obtain the single input-single output link response function in closed form. One of the results deduced from the theory is that an exact impulse response cannot be ascribed to an arbitrary antenna in general, but may be approximated for many applications. The theory can be deployed for future antenna systems research to boost up spectral efficiency (without increasing physical bandwidth) by directly incorporating electromagnetic knowledge into the design of the communication system's signal processing functions.royalsocietypublishing.org/journal/rspa Proc. R. Soc. A 475: 20180699 treated in parallel [1][2][3][4][5][6][7]. For example, some recent book-length treatments of such interdisciplinary topic appear to address issues pertinent to a unified electromagnetic/communicationtheoretic formalism [5][6][7]. Several research articles have also been published in this domain, e.g. see [2,3] (a non-exhaustive list; however, see [5] for an extensive literature on electromagnetic information theory). Owing to the increasing complexity of 5G and other future communication systems, it is no longer possible to separate the study of the physical layer to purely signal processing and purely electromagnetic parts. Indeed, each process is now expected to feed on the other, and for that reason, there is a need to reexamine the subject at the broadest and most comprehensive theoretical level possible, especially in light of some recent advances in fundamental research. As a step toward this goal, the antenna current Green's function (ACGF) [7] was recently introduced as a frequency-domain spatial transfer function method capable of providing an alternative approach to applied electromagnetics more in line with signal processing and communication theory [8,9]. The ACGF formalism is a complete exact electromagnetic generalization of the idea of the 'impulse response' of antenna systems. It was formulated recently in [7-25] using a hybrid approach incorporating functional analysis, distribution theory, differential geometry into electromagnetic theory. Although t...

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“…Applications of the ACGF method in engineering spans topics like mutual coupling analysis [17], mutual coupling compensation [18][19][20], fast EM computation of large system [21][22][23], alternative methods to compute the near-field response [24], and wireless communications [25][26][27] (more applications are discussed in [1].) Most past researches have been so far highlighting applications, with considerably less emphasis on the theoretical, physical, and mathematical foundations, especially for extremely generic radiating systems.…”

Section: Introductionmentioning

confidence: 99%

Generalized Current Green's Function Formalism for Electromagnetic Radiation by Composite Systems

Mikki¹

2020

PIER B

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We provide an explicit geometric generalisation of the antenna current Green's function (ACGF) formalism from the perfect electric conducting (PEC) to generic interacting N-body systems composed of arbitrarily shaped coupled PEC and dielectric objects, with the main emphasis on the mathematical foundations and the rigorous construction of the Green's function using distributional limits. Starting from mainly reciprocity, surface equivalence theorems, and other typical regularity conditions, we carefully construct the current Green's function by employing a combination of methods including Riemannian geometry, distribution theory, and functional analysis. The formalism outlined here for composite domains turns out to be more complicated than the PEC-only formulation due to the former's need to explicitly account for the coupling interaction between the magnetic and electric degrees of freedom. The approach is developed for extremely general systems, and use is made of Riemannian geometry to avoid working with specific or concrete configurations, hence retaining high generality in our final conclusions. While the ACGF tensor's matrix representations depend on the coordinate system on the manifolds supporting the electromagnetic boundary conditions, we focus here on providing coordinate-independent integral expressions for the induced current. With the ACGF it is possible to theoretically treat arbitrary N-body coupled PEC-dielectric configurations as spacefrequency linear systems with an exact and rigorous response function being the current Green's function itself. While the derivation is very general, it still leaves open questions regarding whether the ACGF can be constructed for nonreciprocal systems or using volume integral equations.

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Beam Pattern Analysis of Antenna Array on Complex Platform Using AEP Method Based on Hybrid UTD-ACGF Technique

Cited by 14 publications

References 24 publications

Generalized Current Green's Function Formalism for Electromagnetic Radiation by Coupled Conducting-Dielectric Systems

Generalized Current Green's Function Formalism for Electromagnetic Radiation by Coupled Conducting-Dielectric Systems

The antenna spacetime system theory of wireless communications

Generalized Current Green's Function Formalism for Electromagnetic Radiation by Composite Systems

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