Measuring antenna noise parameters using a set of Wheeler caps

Groves, Patricia; Conroy, Philip; Belostotski, Leonid; Okoniewski, M.

doi:10.1109/eucap.2016.7481866

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Subsequently, the two-port S-parameters can be determined by the method presented by Aberle in [34]. • if the radiation efficiency of an electrically small antenna is unknown and it radiates spherical waves, two-port Sparameters can be determined by SWC method presented by Thal in [38] and [39], [40].…”

Section: Two-port Network Representation Ofmentioning

confidence: 99%

Antenna-Array Network Model

Silva

Okoniewski

Belostotski

2020

IEEE Trans. Antennas Propagat.

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An antenna can be modeled as a two-port network using S-parameters. However, having individual antenna Sparameters is not sufficient for modeling an array of antennas as antennas exhibit mutual coupling. This article proposes a network model to represent an antenna array with mutual coupling. Using the proposed model, an N-element antenna array is modeled as a combination of two-port networks representing each element and an N-port network representing mutual coupling. Two techniques to calculate mutual coupling S-parameters are presented: a primary method using numerical solutions and an approximate method using approximate expressions. The proposed model was validated using four monopole arrays having different interelement spacings, the number of elements, and non-identical antennas.

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Section: Two-port Network Representation Ofmentioning

confidence: 99%

Antenna-Array Network Model

Silva

Okoniewski

Belostotski

2020

IEEE Trans. Antennas Propagat.

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“…For determination of the antenna reradiated field, we can use (15), which in view of ( 23) takes the form…”

Section: Scatteringmentioning

confidence: 99%

“…One of the first attempts to represent an antenna in the form of an electromagnetic wave converter was made in [6], where the field in free space was presented as an infinite sum of spherical harmonics, which made this antenna model inconvenient for use. Further attempts of creating an antenna two-port network were made repeatedly [7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…e authors in [7][8][9][10][11][12][13] used a theoretical approach; however, unfortunately, they did not obtain a complete analytical description of the antenna two-port network. In [14][15][16], the authors developed a technique for the experimental determination of S-parameters of the antenna two-port network, which is based on the Wheeler cap method. However, the application of the method is limited to the microwave range, when the manufacture of the cap does not cause difficulties.…”

Section: Introductionmentioning

confidence: 99%

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Antenna Analytical Representation by a Two-Port Network

Tokarsky

2020

International Journal of Antennas and Propagation

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System analysis is a powerful tool for researching modern wireless systems. This includes breaking such systems into parts that make them up and studying how these parts work together. All these parts can be represented as “black boxes” in the form of two-port or multiport networks with the common system of parameters. Antenna is an integral part of any wireless system, so it should be also represented as a two-port network. In this paper, an analytical model of an arbitrary single antenna in the form of a two-port network, whose electrical and noise parameters are described in terms of scattering matrices, is obtained. The initial data for creating the model are the antenna fundamental parameters, viz., the input reflection coefficient and the radiation efficiency. Applications of this model for antenna analysis operating in the transmitting, receiving, and scattering modes are demonstrated. A numerical example using the antenna scattering matrix for computer simulation of a wireless connection is given.

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