By B.D. Popovic, etc., M.B. Dragovic, A.R. Djordjevic
Read or Download Analysis and Synthesis of Wire Antennas (Electronic & Electrical Engineering Research Studies) PDF
Similar electrical & electronics books
A textbook of electric expertise: quantity 2 ac and dc machines elaborately covers the themes, ac and dc machines, that is part of electric know-how. electric expertise, as a subject matter, covers a number of divisions of electric engineering like uncomplicated electric engineering, electronics, keep watch over structures, instrumentation and communique platforms.
Ebook via Budnick, Ken
This ''toolkit'' provides evidence, formuale, facts and charts to aid the engineer while designing, constructing, comparing, fault discovering and repairing digital circuits. the purpose is for this instruction manual to behave as a reminiscence reduction, show and reference resource for electronics engineers, scholars and technicians.
Additional info for Analysis and Synthesis of Wire Antennas (Electronic & Electrical Engineering Research Studies)
2 be obtained if effect were not properly included in the analysis. eral rule, following from As a gen- a large number of numerical experiments, the TABLE 2. 2. 3. 56 mS 7. 60 mS 7. 2 % 17. 42 mS 1 % 17. 1 % 5 21. 86- j 7 . 2 % 17. 2. density of the matching antenna (away from the points Approximations of excitation regions along the main part of any thin-wire excitation region, the end-cap regions and pos- sible other discontinuities) should not be less than 6 points per wavelength in order to obtain reasonably accurate results for the antenna admittance.
The The lOa (a length However, in the case of elec- second derivative of the antenna current charge gradient) in the vicinity of the excitation region is also varying very rapidly along the antenna axis. In that case a different division of the antenna into segments was found (by numerical experiments) to be necessary. 3. Approximations of coaxial-line excitation 43 radii long is required at the monopole base in order that the excitation field can be sampled adequately, but one or more adjacent, progressively longer segments should be adopted sufficiently accurate approximation of segment.
Consider first the real coaxial-line excitation of a monopole anten- na, sketched in Fig. 2. 8 (a). In the domain bounded by the surface S , 1 parts of the ground plane and the outer coaxial-line conductor, and the coaxial-line cross-section at complex. For example, in in addition avoid the to the the TEH mode, analysis of z=z , the electromagnetic field is very 0 coaxial line a multitude of modes exists as indicated in the figure. 3. 8. Excitation region of monopole antenna driven by coaxial lin~ (a) actual case, (b) approximation to actual case, (c) circuit-theory representation of case (b).
Analysis and Synthesis of Wire Antennas (Electronic & Electrical Engineering Research Studies) by B.D. Popovic, etc., M.B. Dragovic, A.R. Djordjevic