多層環(huán)狀導(dǎo)電媒質(zhì)中離軸偶極子輻射場(chǎng)的級(jí)數(shù)解
SERIES SOLUTION OF THE ELECTROMAGNETIC FIELD EXCITED BY AN OFF-AXIS DIPOLE IN CIRCULARLY MULTILAYERED MEDIUM
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摘要: 當(dāng)偶極子源(電偶極子或磁偶極子)置于多層環(huán)狀導(dǎo)電媒質(zhì)中偏離軸線的任意一點(diǎn)時(shí),所激發(fā)的電磁場(chǎng)既存在TE波又存在TM波。文中導(dǎo)出了各層媒質(zhì)中電磁場(chǎng)的通解,用邊界條件建立了系數(shù)傳遞矩陣,從而完全確定了電磁場(chǎng)表達(dá)式。計(jì)算實(shí)例中給出了一組離軸偶極子的響應(yīng)曲線。
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關(guān)鍵詞:
- 多層環(huán)狀媒質(zhì); 電偶極子; 磁偶極子; TE波; TM波
Abstract: When a dipole source(electric dipole or magnetic dipole) is located at arbitrary point in circularly multilayered conductive medium,the electromagnetic fields excited by the source contain both TE and TM waves.The series solutions of the fields in very layer are derived analytically in this paper.A coefficient recurrence matrix is established by means of the boundary conditions.In such way,the expressions of fields can be degermined definitely.As a numerical example,a group of response curves of an off-axis source are given finally. -
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