An analytical model is proposed for evaluating shielding effectiveness (SE) of a rectangular enclosure populated with conducting plates. The conducting plates are considered as capacitive diaphragms that fill the width of the enclosure, and SE is calculated using the equivalent circuit of the enclosure. The letter presents an improved approach to evaluating enclosures populated with printed circuit boards (PCBs) or plates coated with a composite or radar-absorbing material. The evaluation of the model error was performed when the plate height changed. Both this model and finite element method were used to calculate the SE for enclosures populated with conducting plates, PCBs and the plate coated with a magnetic composite material. The results obtained in the range up to 1 GHz are in good agreement.

In this paper, an analytical model for evaluating the shielding effectiveness (SE) of cylindrical connectors was proposed. A connector shell may be fully or partially filled with dielectric. The results obtained up to 1 GHz using this model and the finite element method are in good agreement. According to this model, SE of the 2RMDT-connector used in the power bus was calculated and SE of 26 dB was obtained for the worst case.

This paper focuses on antenna modeling using wire-grid and surface triangulation as two of the most commonly used MoM-based approaches in this field. A comprehensive overview is provided for each of them, including their history, applications, and limitations. The mathematical background of these approaches is briefly presented. Two working algorithms were developed and described in detail, along with their implementations using acceleration techniques. The wire-grid-based algorithm enables modeling of arbitrary antenna solid structures using their equivalent grid of wires according to a specific modeling recommendation proposed in earlier work. On the other hand, the surface triangulation-based algorithm enables calculation of antenna characteristics using a novel excitation source model. Additionally, a new mesh generator based on the combined use of the considered algorithms is developed. These algorithms were used to estimate the characteristics of several antenna types with different levels of complexity. The algorithms computational complexities were also obtained. The results obtained using these algorithms were compared with those obtained using the finite difference time domain numerical method, as well as those calculated analytically and measured. The analysis and comparisons were performed on the example of a rectangle spiral, a spiral, rounded bow-tie planar antennas, biconical, and horn antennas. Furthermore, the validity of the proposed algorithms is verified using the Monte Carlo methodology.

The article proposes a generalized algorithm for evaluating the shielding effectiveness (SE) of electronic equipment enclosures. The algorithm is based on a number of analytical models that use equivalent circuits to obtain SE values. The article begins with a brief review and interpretation of the mathematical formulation used in the algorithm. Then, we describe the proposed algorithm using flowcharts, and we perform its validation. The validation results show that the proposed algorithm has acceptable accuracy and gives SE values comparable to numerical methods or measurements, with much less time costs. The last part of the article presents the software developed to evaluate SE based on analytical models.

This paper presents a new approach for improving modal filter (MF) performance by using composite insulating materials with a relative permeability $\mu_{r}\gt1$. The method for making approximate calculations of inductance matrices was validated using simple two-conductor structures as an example. The per-unit-length parameters of the microstrip MF were calculated when the substrate permeability changes. Time responses were obtained for filters of different lengths. The results show that the increase of the substrate permeability leads to the increase of the time intervals between the decomposition pulses. This effect can be used to reduce the MF size or to decompose an ultrashort pulse of longer duration.

Томский государственный университет систем управления и радиоэлектроники, 634050, Томск, ул. Ленина 40. Статья поступила в редакцию 06 октября 2022 Аннотация. Разработан лабораторный макет устройства для косвенных измерений эффективности экранирования (ЭЭ) малогабаритных экранирующих конструкций (ЭК). Созданы прототипы измерительной оснастки и программного обеспечения устройства. С их помощью выполнены тестовые измерения ЭЭ типовой прямоугольной ЭК. Показано, что в диапазоне частот от 10 МГц до 1 ГГц, частотные зависимости ЭЭ, полученные с помощью разработанного макета, измерений в безэховой камере, а также вычислений аналитическим и численным методами, хорошо согласуются. Так, среднее значение модуля абсолютной погрешности не превышает 5,4 дБ. Ключевые слова: эффективность экранирования, помехозащищенность, экранирующие конструкции, экранирующий корпус, косвенные измерения. Финансирование: Разработка устройства выполнена за счет гранта РНФ № 19-79-10162, https://rscf.ru/project/19-79-10162. Моделирование выполнено при финансовой поддержке Минобрнауки России (Проект FEWM-2022-0001).