In this paper we present a new approach for identifying an equivalent circuit for the impedance of an aperture-coupled microstrip patch antenna (AC-MSPA). We then use this equivalent circuit to develop a simple design procedure for the AC-MSPA.
"Most of them are devoted to antennas' input impedances such as dipole , microstrip antenna , and conical antenna . Besides, Licul et al.  presented a method based on the singularity expansion method (SEM) for modeling an antenna system in both the frequency domain (FD) and time domain (TD). "
[Show abstract][Hide abstract] ABSTRACT: A SPICE model of an antenna for transmitting is proposed. This model allows for the calculation of the frequency-domain radiation fields for a range of frequencies in which the model is valid, it also allows for the direct calculation of the time-domain (TD) radiation fields for an arbitrary TD excitation signal, the spectrum of which should be within the modeling range. The model is then verified by two examples, both of them demonstrate its validity. This model can be a part of a complete system-level model for electromagnetic compatibility simulation.
International Journal of Microwave and Wireless Technologies 04/2014; 7(02):173-178. DOI:10.1017/S1759078714000531 · 0.35 Impact Factor
"Much effort has been devoted to analyze the effects of back-door coupling such as apertures – and cables , . As for front-door coupling, many studies have dealt with the equivalent circuit of the input impedance of an antenna such as dipole , ultra-wideband (UWB) small antenna , microstrip patch antenna , and arrays . However, few of them have looked into the equivalent circuit of the receiving model of an antenna, from which we can get the coupling voltages on the antenna load. "
[Show abstract][Hide abstract] ABSTRACT: This paper presents a SPICE model for calculating the coupling voltages of a rectangular microstrip antenna illuminated by plane waves. A receiving model based on Thévenin’s theorem is first established in which the ideal voltage source is calculated by the reciprocity theory and the impedance is calculated by the cavity model. Then, by using the method of vector fitting, the obtained receiving model is approximated by rational functions, which can be directly converted to RLC circuits. The proposed SPICE model, which allows the incorporation of either time-varying or nonlinear loads, can be applied to both frequency-domain and time-domain analyses. The proposed SPICE model was verified by several numerical examples.
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