Modeling and measuring of antenna array s-parameters and radiation efficiency

Silva, Supun De; Belostotski, Leonid; Okoniewski, M.

doi:10.1109/apusncursinrsm.2017.8073189

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…The voltage at the edge of the patch is phase shifted in relation to the current. Therefore, peak voltage is present at the end of the patch, with current values close to zero [33,37]. A similar situation occurs in the middle of the wave, further down the line, i.e., at the beginning of the patch.…”

Section: Current Distribution In the Antennamentioning

confidence: 79%

“…In some cases, antenna gain is also given in relation to the dipole antenna and expressed in dBd. The energy gain of an antenna is dependent on its directivity and the energy loss of the antenna, which results from the material it is made of [35,37]. The proposed antenna has a gain of 5.06 dBi at a resonance frequency of 28.00 GHz, which is considered to be high for compact microstrip antennas.…”

Section: Antenna Gainmentioning

confidence: 99%

“…In the case of large discrepancies, it is possible to use a matching system. However, adding another system introduces additional losses and generates additional costs [35][36][37]. The designed width and length of the feed line in the antenna has a complex input impedance of Z = 56.1 + j 5.08 Ω at the resonance frequency of 28.00 GHz, while at 27.50 GHz the complex input impedance is Z = 51.57 − j 10.73 Ω, and at 28.35 GHz the complex input impedance is Z = 59.6 − j 1.39 Ω.…”

Section: Input Impedancementioning

confidence: 99%

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Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

2020

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Communication systems have been driven towards the fifth generation (5G) due to the demands of compact, high speed, and large bandwidth systems. These types of radio communication systems require new and more efficient antenna designs. This article presents a new design solution of a broadband microstrip antenna intended for use in 5G systems. The proposed antenna has a central operating frequency of 28 GHz and can be used in the LMDS (local multipoint distribution service) frequency band. The dimensions of the antenna and its parameters have been calculated, simulated, and optimized using the FEKO software. The antenna has a compact structure with dimensions (6.2 × 8.4 × 1.57) mm. Rogers RT Duroid 5880 material was used as a substrate for the antenna construction, which has a dielectric coefficient of 2.2 and a thickness of 1.57 mm. The antenna described in the article is characterized by a low reflection coefficient of −22.51 dB, a high energy gain value of 3.6 dBi, a wide operating band of 5.57 GHz (19.89%), and high energy efficiency.

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Section: Current Distribution In the Antennamentioning

confidence: 79%

Section: Antenna Gainmentioning

confidence: 99%

Section: Input Impedancementioning

confidence: 99%

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Broadband Microstrip Antenna for 5G Wireless Systems Operating at 28 GHz

2020

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“…We then use the measured 2-port S-parameters of each antenna (see Section II) and the measured matrix S VNA and (1) and (2) to solve for the elements of S Mu using numerical methods. Examples of using this methods for arrays of two antennas was presented by the authors in [35], [36] and briefly discussed next.…”

Section: A Primary Methods Of Finding S Mumentioning

confidence: 99%

“…Current literature supports modeling a single antenna using a two-port network S-parameters, which is explained in Section II. However, currently there seems to be no published work, apart from the authors' short explorations on this subject [35], [36], available on the network representation of an antenna array, which include all ports: physically accessible ports and the ports associated with the free space. This article attempts to fill this research gap.…”

Section: Introductionmentioning

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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