A compound or an offset inclined slot fed by a rectangular waveguide has been analysed using the image method for the evaluation of internal admittance in the Method of Moments framework. The internal admittance has been evaluated from the 2D infinite planar array equivalent image representation of a slot in a waveguide. The advantages offered by this method include the freedom to work in slot coordinates rather than the waveguide coordinates, the reuse of external admittance for air filled waveguides, and the flexibility in the choice of the mutual admittance evaluation technique. Unlike the conventional mode method, the proposed technique does not run into difficulties while evaluating the fields from longitudinal magnetic current for points in the same transverse plane. The θ-algorithm has been used for the convergence acceleration of the series of mutual admittances in the internal admittance evaluation and has been shown to yield better results than other convergence acceleration algorithms investigated. The results obtained from this method have been shown to agree within 0.5% average with those from other theoretical techniques and within 1% average with measurements. The proposed method is useful in the design of compound slot arrays and can be extended to other configurations where the image representation is possible and for various slot aperture distributions.

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Analysis of a rectangular waveguide fed compound slot by image method

This paper presents an improved design and implementation of broadband circularly polarized (CP) antenna that features a broad bandwidth and wide axial ratio (AR) beamwidth. First, the relationship between the three parallel plates (rectangular, semicircular, and semielliptical) and θ is analyzed . The semielliptical parallel plates (PP) used to obtain a wider 3dB AR-beamwidth (104°×110°×102°×118° at φ= 0°, 45°, 90°, 135°, respectively) compared with rectangular and semicircular PP. Secondly, orthogonal crosses with 43° inclined are used to generate orthogonal fields, and broadband characteristics can be obtained by adjusting the arm of orthogonal crosses. The semielliptical CP-PP antenna prototype was verified by ANSYS HFSS simulation. According to the measurement results, the -10 dB return loss is about 20% (24.3- 29.7GHz). A gain of 9.22 dBi c at 27 GHz and a 3 dB AR - beamwidth of 106°×105° at φ=0° and φ=90° are obtained. The designed semielliptical CP-PP antenna can be more beneficial to 5G millimeter wave applications of semielliptical). to the AR-beamwidth of the PP is balanced and symmetrical at 90°, respectively. orthogonal crosses with inclined to generate orthogonal fields, and broadband characteristics be by adjusting of the arm of the

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An improved design and implementation of a broadband and wide axial ratio beamwidth circularly polarized parallel plate antenna

5G technology has been rapidly developed under the trend of utilization in various countries. It is an information dissemination technology with faster and more stable transmission speed. Compared with 4G technology, 5G technology has a low delay rate and higher transmission speed, and it can be applied in tasks such as the Internet of Vehicles and the transmission of 3D images. For 5G technology, the communication system is a huge challenge. It not only needs to deal with the transmission speed between users and users but also needs to deal with the efficiency between users and channels. 5G researchers will spend a lot of material and financial resources to solve these problems. This study uses artificial intelligence technology to analyze its application in resource allocation of 5G communication systems. It also uses the collaborative filtering algorithm to realize the automatic recommendation and matching problem of 5G communication system resources. The research results show that artificial intelligence technology has good feasibility in the resource allocation problem of 5G communication system. It can achieve the resource allocation task of 5G technology communication system with high efficiency and accuracy, and all prediction errors are within 3% for the characteristics of the three 5G communication systems in this study.

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Optimal Allocation Method of 5G Communication System Resources Assisted by Artificial Intelligence Technology

Direct synthesis of slot arrays for 5G communication applications

In this paper, microstrip filters using paired fan-shaped capacitors with controllable transmission zeros are proposed. The paired capacitors are employed to replace the conventional single capacit...

Chunmei Liu

Papers

Direct synthesis of slot arrays for 5G communication applications

Design of Microstrip Filters Using Paired Fan-Shaped Capacitors with Controllable Transmission Zeros