Download Antenna Engineering : Theory and Problems by Boris Levin PDF

By Boris Levin

The ebook bargains with theoretical and experimental examine of antennas. The presentation relies at the electromagnetic thought. It starts off with the idea of skinny antennas. skinny antennas characterize one of many major kinds of radiators, hence the idea of skinny antennas is the root of the antennas research.

Special recognition is paid to the necessary equation of Leontovich-Levin for a present alongside a instantly thin-walled steel cylinder, that is resembling the equation of Hallen with an actual kernel. including the research of varied forms of antennas, the e-book offers with the issues of synthesis together with the construction a wide-band radiator by way of opting for of the categories and the magnitudes of targeted a lot, that are attached alongside a linear radiator and create in a given frequency band excessive electric functionality.

Problems of antenna engineering are mentioned within the moment 1/2 the e-book, together with the result of program of a repayment strategy for the security of people opposed to irradiation and structural positive factors of send antennas.

Show description

Read Online or Download Antenna Engineering : Theory and Problems PDF

Best microwaves books

Passive Microwave Device Applications of High-Temperature Superconductors

This booklet describes the applying of latest extreme temperature superconducting fabrics to microwave units and structures. It bargains with the basics of the interplay among microwaves and superconductors, and features a simple description of the way microwave units will be built utilizing those fabrics.

Blind Speech Separation (Signals and Communication Technology)

This is often the world’s first edited e-book on self sufficient part research (ICA)-based blind resource separation (BSS) of convolutive combinations of speech. This booklet brings jointly a small variety of top researchers to supply tutorial-like and in-depth remedy on significant ICA-based BSS issues, with the target of changing into the definitive resource for present, accomplished, authoritative, and but available remedy.

Controlling Radiated Emissions by Design

The third version of Controlling Radiated Emissions by way of layout has been up-to-date to mirror the most recent adjustments within the box. New to this version is fabric on features of technical boost, particularly long-term power potency, power saving, RF toxins keep an eye on, and so forth. This ebook keeps the step by step method for incorporating EMC into each new layout, from the floor up.

Metamaterials for Perfect Absorption

This ebook presents a complete review of the speculation and functional improvement of metamaterial-based ideal absorbers (MMPAs). It starts with a quick background of MMPAs which studies a few of the theoretical and experimental milestones of their improvement. The theoretical historical past and primary operating ideas of MMPAs are then mentioned, supplying the required heritage on how MMPAs paintings and are developed.

Additional resources for Antenna Engineering : Theory and Problems

Example text

E. this method leads to incorrect results. 27) is equal to zero. 25). 27) in the area of serial resonance. 27)—give more accurate results in one area and have an approximate nature in another area. 31) ZA = ZS + ZP . 27), p/2 is the value of kL at the point of the serial resonance, p is the value of kL at the point of the parallel resonance, and a is the value of kL at an arbitrary point. As can be seen from this expression, when a changes from p/2 to p the value of the first term uniformly decreases from ZS to zero, and the value of the second term increases uniformly from zero to ZP.

The analysis of two-radiator systems is based on the fact that the current of one radiator creates the field, which has the electrical component tangential to the surface of the second radiator. This component induces the field EV (J1)dV on the surface of element dV of the second radiator. In order to execute the boundary condition EV = 0 on this surface, the own field of the second radiator on its surface must be equal to –EV (J1)dV. The generator of the second radiator must increase the power in the element dV by dP = –EV (J1)J2(V)dV and, accordingly, the power in the entire radiator by L2 P=- Ú E ( J )J (V )dV .

5a) is an example of a radiator with distributed load. 51) where Ez(a, z) and Hj(a, z) are the tangential component of the electric field and the 42 Antenna Engineering: Theory and Problems azimuthal component of the magnetic field, respectively, and Z(z) is a surface impedance, which is in the general case dependent on coordinate z. , inside a magneto dielectric sheath) is independent of a field structure in another medium (ambient space). 51) on the antenna surface are valid and the surface impedance substantially changes the distribution of current along the antenna already in the first approximation, the antenna is called an impedance antenna.

Download PDF sample

Rated 4.33 of 5 – based on 22 votes