Mutual coupling between microstrip dipoles in multielement arrays

Katehi, P.B.

doi:10.1109/8.18722

Cited by 21 publications

(5 citation statements)

References 13 publications

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“…This method is based on the Richmond's reaction and assumes isotropic substrates and superstrates, with the conducting patches located on the same dielectric substrate. The technique of computing the mutual coupling between the microstrip dipoles in multielement arrays using the dyadic Green's function was presented [28]. The dipoles were excited by an electromagnetically coupled transmission line in the isotropic substrates.…”

Section: Parameters Affected Due To Mutualmentioning

confidence: 99%

Mutual Coupling in Phased Arrays: A Review

Singh

Sneha

Jha

2013

International Journal of Antennas and Propagation

128

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The mutual coupling between antenna elements affects the antenna parameters like terminal impedances, reflection coefficients and hence the antenna array performance in terms of radiation characteristics, output signal-to-interference noise ratio (SINR), and radar cross section (RCS). This coupling effect is also known to directly or indirectly influence the steady state and transient response, the resolution capability, interference rejection, and direction-of-arrival (DOA) estimation competence of the array. Researchers have proposed several techniques and designs for optimal performance of phased array in a given signal environment, counteracting the coupling effect. This paper presents a comprehensive review of the methods that model and mitigate the mutual coupling effect for different types of arrays. The parameters that get affected due to the presence of coupling thereby degrading the array performance are discussed. The techniques for optimization of the antenna characteristics in the presence of coupling are also included.

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Section: Parameters Affected Due To Mutualmentioning

confidence: 99%

Mutual Coupling in Phased Arrays: A Review

Singh

Sneha

Jha

2013

International Journal of Antennas and Propagation

128

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“…The moment mediod has been used in the literature as an evaluation technique to calculate the mutual coupling between micro-strip antenna arrays [17, 18, 19, 20]. Using reciprocity, a voltage is applied on one slot and a current is measured across the other slot.…”

Section: Discussionmentioning

confidence: 99%

Axially uniform magnetic field-modulation excitation for electron paramagnetic resonance in rectangular and cylindrical cavities by slot cutting

Sidabras

Richie

Hyde

2017

Journal of Magnetic Resonance

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In continuous-wave (CW) Electron Paramagnetic Resonance (EPR) a low-frequency time-harmonic magnetic field, called field modulation, is applied parallel to the static magnetic field and incident on the sample. Varying amplitude of the field modulation incident on the sample has consequences on spectral line-shape and line-height over the axis of the sample. Here we present a method of coupling magnetic field into the cavity using slots perpendicular to the sample axis where the slot depths are designed in such a way to produce an axially uniform magnetic field along the sample. Previous literature typically assumes a uniform cross-section and axial excitation due to the wavelength of the field modulation being much larger than the cavity. Through numerical analysis and insights obtained from the eigenfunction expansion of dyadic Green’s functions, it is shown that evanescent standing-wave modes with complex cross-sections are formed within the cavity. From this analysis, a W-band (94 GHz) cylindrical cavity is designed where modulation slots are optimized to present a uniform 100 kHz field modulation over the length of the sample.

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“…A method for evaluating the mutual coupling of microstrip dipoles in an array environment was reported and discussed in Ref. [8], which only considered a small array of five elements. However, it cannot be applied to a large array because the high-order mutual coupling is no longer explicitly formulated.…”

Section: Introductionmentioning

confidence: 99%

Modeling of mutual coupling of arbitrary order in coupled circuits and array antennas

Han

2010

Int J RF and Microwave Comp Aid Eng

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This article presents a fundamental strategy for accurately modeling the mutual coupling of arbitrary order in any large-scale electromagnetic structures and high-density integrated chips such as antenna array elements and coupled circuit elements. The proposed method starts from the modeling of the first-order mutual coupling, and it consists of two main steps. First of all, an equivalent circuit model describing low-order mutual coupling (adjacent coupling) is characterized and established, of which each parametric value is accurately extracted by making use of a numerical calibration technique. Then, the circuit model for high-order mutual coupling (crossover or crosstalk coupling) is generated from the lower order models, and it can further be used for the modeling of mutual coupling of any higher order. The accuracy and efficiency of the proposed method are demonstrated by three different kinds of structure including a linear phased array antenna, a finite periodic electromagnetic structure, and a planar low-pass filter. This novel approach represents an easy, fast, and effective characterization of arbitrary-order mutual coupling. It can find applications in the modeling of mutual coupling between any circuit elements and building blocks such as antennas, resonators, and even small discontinuities, and it promises to be helpful for the analysis and iterative design of microwave circuits and antenna arrays.

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Mutual coupling between microstrip dipoles in multielement arrays

Cited by 21 publications

References 13 publications

Mutual Coupling in Phased Arrays: A Review

Mutual Coupling in Phased Arrays: A Review

Axially uniform magnetic field-modulation excitation for electron paramagnetic resonance in rectangular and cylindrical cavities by slot cutting

Modeling of mutual coupling of arbitrary order in coupled circuits and array antennas

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