Antenna Toolkit (2nd Edition) by Joseph J. Carr PDF

By Joseph J. Carr

The textual content makes point out of a complement CD-ROM containing instruments which might be utilized in calculating antenna parameters. This CD-ROM was once no longer dispensed with the digital model of the textual content and isn't incorporated here.

Joe Carr has supplied radio amateurs and short-wave listeners with the definitive layout consultant for sending and receiving radio indications with Antenna Toolkit 2d edition.

the hot variation has been revised to incorporate additional circumstances of propagation, extra antennas and likewise new chapters - Small Loop Antennas (a subject of substantial curiosity, which has been the topic of a lot contemporary debate within the novice radio press); and Yagi Beam Antennas (widely used at HF and VHF).

Joe Carr's services within the quarter of antenna layout is famous. Antenna designers, even if hobbyist or technician, might be guaranteed they want glance no extra than Antenna Toolkit for the whole consultant to realizing the practicalities of utilizing and designing antennas at the present time.

A whole resolution for antenna layout in a single package.

The definitive advisor to antenna layout for radio amateurs and short-wave listeners.

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Extra info for Antenna Toolkit (2nd Edition)

Example text

Safety first! Before dealing with the radio and performance issues, let us first deal with safety matters – you do not want to be hurt either during installation, or during the next wind storm. Two problems present themselves: reliable mechanical installation and electrical safety. Electrical safety note. Every year we read sad news in the magazines of a colleague being electrocuted while installing, or working on, an antenna. In all of these tragic cases, the antenna somehow came into contact with the electrical power lines.

18 shows the conventions for specifying antenna patterns. The antenna is a dipole, with both relative electric field strength and relative powers plotted (both types of plot are done). The 0–2708 line is along the length of the dipole, while the 90–1808 line is perpendicular to the dipole. e. 5 power point. These points are also called the ‘À3 dB’ points. Recall that À3 dB represents a power ratio of 1:2. SOME ANTENNA CONSTRUCTION HINTS ______________________________________________________________________ This section will help you think up some good ideas on how to erect the antenna.

At twice the distance ð2rÞ the light spreads out and covers four times the area (square ‘B’). ’ This means that a radio signal gets weaker very rapidly as the distance from the transmitter increases, requiring ever more sensitive receivers and better antennas. 7). Because moving electrical currents possess both electrical (E) and magnetic (H) fields, the electromagnetic wave launched into space has alternating E-field and H-field components. These fields are transverse (meaning they travel in the same direction) and orthogonal (meaning the E- and H-fields are at right angles to each other).

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Antenna Toolkit (2nd Edition) by Joseph J. Carr


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