A novel electrical model to an antenna array

Abstract

In this paper, an electrical model is developed to represent the input admittance of an antenna array with a finite number of elements. This model consists of an RLC bock component to represent the input admittance of each elementary antenna element and a capacity component to represent different degrees of antenna coupling effects. The equations based on cavity model are developed to represent physical meaning of each model. Numerical results show that good accuracy for the simulation results can be obtained by using this electrical model to the results obtained by using HFSS. As the array is large and sparse, a very small amount of computation can yield good accuracy. This model is shown not only to be numerically efficient compared to the full wave analysis using the moment method, but also to give physical insight into the antenna array mutual coupling mechanism. Furthermore, this model has no limitation on antenna array geometry and excitation.

Equivalent Lumped-Element Circuit of Aperture and Mutually Coupled Cylindrical Dielectric Resonator Antenna Array

“…The steps in designing these antennas are carefully referred to the Equations (1) to (3). In addition, the equivalent lumped-element circuit is designed in the Advanced Design System (ADS) by applying Equations (4) to (14). Once these two stages are completed, the antennas are ready to be fabricated.…”

“…It is noticed that R r decreases by increasing slot length, and an antenna array achieves the best bandwidth (S 11 < −10 dB) when the value of R r is less than 100 ohms. The R r , L r and C r of the radiating elements are determined by using the Matlab programs of Equations (4a) to (14). For the inter-slot distance analysis, the best distance between two slots is 25 mm.…”

Ultra-Wideband Metamaterial-Loaded Microstrip Array Antennas using Fibonacci & Fractal Geometric Patterns, Design and Modelling

“…While, the mutual coupling between elements can affect the array's performances. So, in order to obtain accurate equivalent model of an array, the mutual coupling between elements should be consider [20]. In our research we propose a technique to calculate the equivalent circuit model parameters of the array.…”

“…In order to build our model, we began by analyzing the CMTL-loaded monopole element, then we used two elements, finally we generalized the technique in order to build an electrical model of proposed array. The introduced model is very important because in one hand it helps reducing the time of simulation and in the other hand, the proposed model can help us to display the design of an array taking in consideration all kind of coupling between different elements [20]. In order to evaluate our model, we compared the results given by the electrical model ADS simulator and those obtained by using HFSS simulator which is based on FEM method.…”

A Circuit Model to a Directive Triangular EBG Antenna

“…• Modeling the coupling between the metal blocks by a coupling capacitance as explaining in our previous works, [15].…”