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This paper presents analysis of substrate integrated waveguide (SIW) structures using contour integral equation method. By ignoring the field variation in vertical direction, the SIW structure is decomposed into internal and external problems. The internal electromagnetic (EM) fields are governed by the contour integral equation, while the external EM… (More)

This paper summarizes recent development in efficient solution of electromagnetic problems based on integral equation. First, hybridization of integral equation method with differential equation method is introduced for reverberation chamber (RC) modeling. It is shown that the hybrid method significantly reduces computational load for RC modeling. Second,… (More)

Due to increasing demands for a large number of users and a large amount of data transmission, a 4G LTE communication system will require its antenna to have omnidirectional radiation patterns and wide frequency bandwidth. To this end, in this paper, a novel omnidirectional horizontally polarized (HP) antenna is presented for the 4G communication systems.… (More)

This paper reviews recent advances of sparse solution methods for solving inverse problems in antennas and propagation. Mathematical formulation of sparse solution methods is first presented. Typical applications are then introduced, including direction of arrival estimation, extrapolation of electromagnetic signals, array diagnosis, and array beamforming.… (More)

Unstirred frequencies of a reverberation chamber (RC) are attributed to its discrete mode distribution. Transient analysis is usually preferred in predicting an RC's mode distribution. For its geometrical flexibility, the time-domain integral equation (TDIE) is suitable for transient analysis of RCs containing stirrers of arbitrary shape. Due to the… (More)

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