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The imperfectly conducting circular‐loop antenna
Author(s) -
Lin JuangLu
Publication year - 1973
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs008i003p00251
Subject(s) - resistive touchscreen , loop (graph theory) , antenna (radio) , electrical impedance , loop antenna , current (fluid) , broadband , point (geometry) , integral equation , mathematical analysis , mathematics , physics , acoustics , antenna measurement , computer science , antenna factor , optics , geometry , telecommunications , combinatorics , quantum mechanics , computer vision , thermodynamics
The fundamental transmitting characteristics of an imperfectly conducting circular‐loop antenna are investigated theoretically. To obtain the antenna‐current distribution, a mathematically simpler method based on a differential equation for the loop current is first developed. Next, an existing, more general method based on an integral equation for the distribution of current is applied with modification and solved numerically with a digital computer. Knowing the current distribution, one can easily find the driving‐point impedance. The results of both methods are compared for the case of uniform resistive loading, and they are found to be in good agreement. Some additional numerical examples showing the effect of nonuniform reactive loading on the driving‐point impedance are also included. The outcome of this research should provide useful information for the design of broadband circular‐loop antennas.