TY - JOUR

T1 - COMPARISON OF QUASI-STATIC AND EXACT ELECTROMAGNETIC FIELDS FROM A HORIZONTAL ELECTRIC DIPOLE ABOVE A LOSSY DIELECTRIC BACKED BY AN IMPERFECT GROUND PLANE.

AU - Mosig, Juan R.

AU - Sarkar, Tapan K.

PY - 1986

Y1 - 1986

N2 - In most microstrip transmission lines, analysis is made assuming that a quasi-TEM mode exists and propagates down the line. The authors seek to obtain the region of validity of this assumption. Their second objective is to derive the expressions for the fields for a horizontal electric dipole over a lossy dielectric medium backed by an imperfect ground plane. It is shown that, to a first approximation, fields at the air-dielectric interface are independent of the ground plane conductivity. Since attention is confined to coupling between lines, the goal is to computate the fields primarily at the air-dielectric interface. Finally, numerical results are presented to show where the quasi-static approximations deviate from the exact solution for a given microstrip geometry as the frequency of operation or the observation point is changed.

AB - In most microstrip transmission lines, analysis is made assuming that a quasi-TEM mode exists and propagates down the line. The authors seek to obtain the region of validity of this assumption. Their second objective is to derive the expressions for the fields for a horizontal electric dipole over a lossy dielectric medium backed by an imperfect ground plane. It is shown that, to a first approximation, fields at the air-dielectric interface are independent of the ground plane conductivity. Since attention is confined to coupling between lines, the goal is to computate the fields primarily at the air-dielectric interface. Finally, numerical results are presented to show where the quasi-static approximations deviate from the exact solution for a given microstrip geometry as the frequency of operation or the observation point is changed.

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U2 - 10.1109/tmtt.1986.1133357

DO - 10.1109/tmtt.1986.1133357

M3 - Article

AN - SCOPUS:0022706716

SN - 0018-9480

VL - MTT-34

SP - 379

EP - 387

JO - IRE Transactions on Microwave Theory and Techniques

JF - IRE Transactions on Microwave Theory and Techniques

IS - 4

ER -