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By B.D. Popovic, etc., M.B. Dragovic, A.R. Djordjevic

ISBN-10: 0471900087

ISBN-13: 9780471900085

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Additional resources for Analysis and Synthesis of Wire Antennas (Electronic & Electrical Engineering Research Studies)

Sample text

017 1. 32). Assuming the voltage at the coaxial-line opening, known, the TEH-mode field is given in eqn. (2. 16) , because the voltage across the coaxial-line opening due to any higher-order mode is zero, which can be proved from eqns. (2. 32) . 35) are unknowns to be determined.

2. 9. Excitation region of monopole antenna driven by finite-size belt generator; (a) actual case, (b) approximation to actual case, (c) circuit-theory representation of case (b). 26) in Reference 26 that a very simple conclusion is reached in this manner under certain conditions. If the impressed field at the antenna sur- face in the excitation region is assumed to be of the form l(1 +COS 1TZ) E. ::_aa (2. 18 (l-1). 9(a). en in eqn. 28) can be The excitation field of the form giv- introduced into any equation for current dis- tribution along symmetrically fed distribution determined current needs to dipoles, and the approximate current in a desired manner.

28) is the same along the antenna axis. 28) is used as it stands. Substituting the expression in eqn. 26), for symmetrical dipole antenna with z =-h 1 the form and z =h that equation takes 2 h f l(z') g(r) dz' + c 1 cos kz kV - . - Cg(z) (2. 30) JW\1 -h where TTZ 2 - 1 - cos- - (P - 2) cos kz aa 2 2 [ P cos k(z-aa) - (P - 2) cos kz], [P 2 J, Oaa 2 K=kaa(P -1) and P=TT/(kaa). 3 are values of admittances several monopole antennas analysed to increasing degree principal antenna with the of part.

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Analysis and Synthesis of Wire Antennas (Electronic & Electrical Engineering Research Studies) by B.D. Popovic, etc., M.B. Dragovic, A.R. Djordjevic


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