Smart antenna design alimented by a 4x4 butler matrix

almorabeti, Soumaya almorabeti; Terchoune, Hanae; Rifi, Mounir; Tizyi, Hafid; Smihily, Sara

doi:10.12928/telkomnika.v19i4.18788

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…In practice, the accurate covariance matrices cannot be gotten due to the finite snapshots data, only the estimation 𝑅 ∧ of real R can obtained according to (3).…”

Section: Bic Principlementioning

confidence: 99%

Number of sources estimation using a hybrid algorithm for smart antenna

Miry

Sabri

Mary

2022

IJECE

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<span lang="EN-US">The number of sources estimation is one of the vital key technologies in smart antenna. The current paper adopts a new system that employs a hybrid algorithm of artificial bee colony (ABC) and complex generalized Hebbian (CGHA) neural network to Bayesian information criterion (BIC) technique, aiming to enhance the accuracy of number of sources estimation. The advantage of the new system is that no need to compute the covariance matrix, since its principal eigenvalues are computed using the CGHA neural network for the received signals. Moreover, the proposed system can optimize the training condition of the CGHA neural network, therefore it can overcome the random selection of initial weights and learning rate, which evades network oscillation and trapping into local solution. Simulation results of the offered system show good responses through reducing the required time to train the CGHA neural network, fast converge speed, effectiveness, in addition to achieving the correct number of sources.</span>

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“…In practice, the accurate covariance matrices cannot be gotten due to the finite snapshots data, only the estimation 𝑅 ∧ of real R can obtained according to (3).…”

Section: Bic Principlementioning

confidence: 99%

Number of sources estimation using a hybrid algorithm for smart antenna

Miry

Sabri

Mary

2022

IJECE

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“…The most recently used technology for rectenna systems is the microstrip technology thanks to low weight, small volume occupancy, ease of integration, low manufacturing cost, elimination of wires and cables, and low power generation without batteries. The rectenna system is divided into five blocks as shown in Figure 1 [6], [7]. The rectenna system contains the microstrip receiving antenna and a radiofrequency-to-direct current (RF-DC) conversion circuit [1].…”

Section: Introductionmentioning

confidence: 99%

Improved design and performance of the global rectenna system for wireless power transmission applications around 2.45 GHz

En-Naghma,

Halaq,

El Ougli

2024

IJECE

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This work proposes a new conception of the global microstrip rectenna system operating around 2.45 GHz. This improved rectenna system associates a receiving antenna with a rectifier circuit. This rectenna is printed on an FR4 substrate. The proposed antenna is a 1×4 microstrip antenna patch array with pentagonal patches using the defective ground structure method and operates with circular polarization. To show the effectiveness of this array, the results obtained by the computer simulation technology microwave studio (CST MWS) software prove that this array is good in terms of high gain, high directivity, high efficiency, wideband, small volume, and well-adaptation, and all these results are confirmed by another solver high-frequency structure simulator (HFSS). The improved rectifier is a microstrip rectifier that uses an HSMS2852 Schottky diode by using a series topology. The effectiveness of this rectifier is proved by the simulation results using advanced design system (ADS) software in terms of well-matching input impedance, high efficiency, and important output direct current (DC) voltage value. The proposed rectenna system is more efficient compared with the existing works and is very appropriate for several applications of wireless power transmission to power supply electronic instruments in various fields cleanly on our planet.

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“…The blocks of the rectenna's basic architecture are illustrated in Figure 1 as in [15], [16]. This figure is added to explain the main functions of the rectenna system.…”

Section: Introductionmentioning

confidence: 99%

New conception of 3×4 circularly polarized antenna patch network for RF energy harvesting at 2.45 GHz

En-Naghma,

Halaq,

El Ougli

2023

IJEECS

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This paper presents a developed design of a 3×4 circular polarization microstrip antenna patch array whose its resonance frequency is 2.45 GHz in the ISM band. This array is printed on a FR4 substrate of 1.58 mm thickness with a dielectric permittivity of 4.4. The basic antenna patch is a square shape inserted by a rectangular slot inclined positioned diagonally at the center to achieve circular polarization. In addition, a triangular-shaped slit is added at each of the four corners of the patch. The antenna array performance is tested numerically using two different software packages, CST MWS and HFSS. The antenna’s array size is compacted to a 22.7 cm×13.5 cm. The simulated results give good performance results in terms of return loss and gain; directivity is found to be 9.66 dBi at 2.45 GHz; the axial ratio value is 1.69 dB; and total efficiency is about 95.55% at 2.45 GHz. Then, the simulated results obtained by these two programs are in good agreement, which makes this proposed array design very suitable for radio frequency energy harvesting and its various applications to power supply different devices in a clean way for our environment.

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Smart antenna design alimented by a 4x4 butler matrix

Cited by 4 publications

References 13 publications

Number of sources estimation using a hybrid algorithm for smart antenna

Number of sources estimation using a hybrid algorithm for smart antenna

Improved design and performance of the global rectenna system for wireless power transmission applications around 2.45 GHz

New conception of 3×4 circularly polarized antenna patch network for RF energy harvesting at 2.45 GHz

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