The Multilevel Fast Multipole Algorithm for Emc Analysis of Multiple Antennas on Electrically Large Platforms

Abstract

Abstract-The new definition of arbitrary isolation between antennas is proposed according to the microwave network theory. The multilevel fast multipole algorithm (MLFMA) with the near-field preconditioner is implemented to predict the isolation between multiple antennas on electrically large platforms over a wide frequency range. Experimental results show that the isolation defined in this paper is more practical than the traditional one. Finally the radiation pattern and the isolation results for the ultra-shortwave antennas mounted on full-scale models such as an aircraft and a ship are obtained and discussed, which can give significant instructions to the platform-mounted antennas design.

Multilevel Fast Multipole Algorithm for Radiation Characteristics of Shipborne Antennas Above Seawater

“…In [9][10][11], Geng and colleagues developed an approximate means of handling the dyadic half-space Green's function, with application to the fast multipole method (FMM) and the multilevel fast multipole algorithm (MLFMA), which were originally developed for targets in free space [12][13][14][15][16][17][18][19][20][21][22]. In their works, the near MLFMA terms are evaluated via the use of the exact dyadic Green's function, the latter evaluated efficiently via the complex-image technique [23].…”

On Adaptive Beamforming for Coherent Interference Suppression via Virtual Antenna Array

“…Virtual array transformation can increase the degrees of freedom of an antenna array and realize the transformation between different array geometry. Therefore, VAT technique is supposed to have a broad applications in the complex environment to reduce electromagnetic interference (EMI) [13], to improve the performance of antenna array in the handhold devices [14], to adopt information from the nearby environment in the body network communication [15], to improve the imaging quality of tomography SAR [16]. In recent years, the combination of virtual antenna and array signal processing theory has drawn great attention, and most researches focus on the Direction-of-Arrival (DOA) estimation aspect [17,18], and comparatively less in beam forming field [19].…”

Analysis of surrounded antennas mounted on large and complex structures using a hybrid method

“…These methods can be separated into two groups, rigorous methods [2], [3], [4] and hybrid methods [5], [6]. A hybrid method allowing modular analysis has been proposed recently [7].…”