Ray analysis of mutual coupling between antennas on a convex surface

Pathak, P.H.; Wang, Nan

doi:10.1109/tap.1981.1142682

Cited by 136 publications

(88 citation statements)

References 12 publications

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“…For this, we use the method of Hill et al (1994) [1], viewing the aircraft cabin as a reverberant microwave cavity in which only four loss mechanisms are possible: (1) loss due to escape from the cavity, (2) loss due to absorption by lossy media, (3) loss due to finite wall conductivity, and (4) loss due to intercept by other antennas. We assume that the loss due to mechanisms (3) and (4) is insignificant compared to the first two mechanisms, and we further assume that transmission through windows is the dominant contribution to (1). Under these assumptions, the ratio of power escaping the cabin (through windows) to total power transmit is L w ≈ Q 2 /(Q 2 + Q 3 ) where Q 2 and Q 3 are "quality factors" associated with absorption and escape loss, respectively, obtained from expressions in [1].…”

Section: Methodsmentioning

confidence: 99%

“…This assumes that the power is equally divided across both polarizations, again justified due to the copious scattering within the cabin. The electric field due to any one current moment at any other point on the fuselage can be found using the UTD convex surface "creeping wave" formulation given in [3]. Assuming the associated geodesic ray paths are unobstructed by wings and other discontinuities, the total field at any given point on the fuselage is obtained simply by repeating this procedure for each current moment and summing the results, yielding the total electric field E r .…”

Section: Methodsmentioning

confidence: 99%

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Path loss from a personal electronic device inside an aircraft cabin to an exterior fuselage-mounted antenna

Hurst

Ellingson

2008

2008 IEEE Antennas and Propagation Society International Symposium

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Path loss from a personal electronic device inside an aircraft cabin to an exterior fuselage-mounted antenna

Hurst

Ellingson

2008

2008 IEEE Antennas and Propagation Society International Symposium

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“…The rigorous method to evaluate the mutual coupling is adapted from [23,25] and it is based on the Uniform Theory of Diffraction, [23,26,27] due to the curved conducting surface.…”

Section: Mutual Coupling Of Slots On a Paraboloidmentioning

confidence: 99%

“…and the T coefficients are given in [26]. The off-diagonal elements of the T matrix are much smaller than the diagonal ones i.e.,…”

Section: Mutual Coupling Of Slots On a Paraboloidmentioning

confidence: 99%

Correlation Effects on the Mimo Capacity for Conformal Antennas on a Paraboloid

Kalialakis

Kaifas

Georgiadis³

2016

PIER M

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Abstract-The use of conformal antennas in a MIMO link scenario is investigated. Conformal slot antennas are considered both in the transmitter and the receiver. First, a new modified correlation coefficient is derived that goes beyond the Clarke coefficient and takes into account the element radiation pattern. Secondly, a hybrid formulation that accounts for the impact of the mutual coupling and the pattern dependent correlation on the capacity is presented. The mutual coupling for slots placed circumferentially on a paraboloid substrate is derived using a rigorous approach based on Uniform Theory of Diffraction (UTD). The capacity is evaluated for the case of Rayleigh fading channel considering the new pattern dependent correlation coefficient and the conformal antenna mutual coupling. The planar case is included as a limiting case. It is shown that for conformal antennas on a paraboloid the capacity degradation compared to the planar case is up to 0.5 bps/Hz due to coupling and correlation.

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“…The utilization of an asymptotic second-kind electric DGF circumvents the problems inherent in an exact formulation that were discussed previously. As mentioned previously, the asymptotic DGF is derived within the context of a uniform theory of diffraction (UTD) formalism developed by Pathak and Kouyoumjian [11]. In order to derive the asymptotic DGF, a closed-form expression for tracing geodesic paths on prolate spheroids is needed.…”

Section: Fe-bi Formulationmentioning

confidence: 99%

A Practical Approach to Modeling Doubly Curved Conformal Microstrip Antennas

Macon¹,

Trott²,

Kempel³

2003

PIER

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Abstract-Designers are increasingly integrating conformal microstrip antennas into the curved structures of either air or land vehicles. Quite often, these structures are doubly curved (e.g. curved along two orthogonal surface directions). This practice necessitates the development of accurate codes versatile enough to model conformal antennas with arbitrarily shaped apertures radiating from doubly curved surfaces. Traditional planar-structure-based design techniques are not well suited for this application. A hybrid finite element-boundary integral formulation appropriate for the high-frequency analysis and design of doubly curved conformal antennas is introduced in this paper. The novelty of this approach lies in its use of an asymptotic prolate spheroidal dyadic Green's function to model the physics of curved surface diffraction. To demonstrate the utility of this approach, the effects of curvature on the resonant frequency and input impedance of both a doubly curved conformal square and circular patch antenna are investigated. Different feed positions are also considered. Due to a paucity of published experimental data, the numerical results are benchmarked by comparison with the results for planar square and circular patch antennas. The planar results are obtained by using an experimentally validated planar finite element-boundary integral code.

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Ray analysis of mutual coupling between antennas on a convex surface

Cited by 136 publications

References 12 publications

Path loss from a personal electronic device inside an aircraft cabin to an exterior fuselage-mounted antenna

Path loss from a personal electronic device inside an aircraft cabin to an exterior fuselage-mounted antenna

Correlation Effects on the Mimo Capacity for Conformal Antennas on a Paraboloid

A Practical Approach to Modeling Doubly Curved Conformal Microstrip Antennas

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