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Download e-book for kindle: Antenna Toolkit (2nd Edition) by Joseph J. Carr

Posted On March 30, 2017 at 10:34 am by / Comments Off on Download e-book for kindle: Antenna Toolkit (2nd Edition) by Joseph J. Carr

By Joseph J. Carr

The textual content makes point out of a complement CD-ROM containing instruments which are utilized in calculating antenna parameters. This CD-ROM used to be now not 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 advisor for sending and receiving radio indications with Antenna Toolkit second edition.

the hot version has been revised to incorporate additional instances of propagation, extra antennas and in addition 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 region of antenna layout is famous. Antenna designers, even if hobbyist or technician, should be guaranteed they wish glance no extra than Antenna Toolkit for the entire consultant to knowing the practicalities of utilizing and designing antennas this present day.

A entire answer for antenna layout in a single package.

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

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Extra resources for Antenna Toolkit (2nd Edition)

Example text

A symmetric dipole) with an unbalanced (coaxial) feedline. It can also be induced by antenna currents onto a nearby coaxial feedline. ). The interrelated concepts of antenna gain and directivity are of much concern to antenna builders. Gain refers to the fact that certain antennas cause a signal to seem to have more power than it actually can claim. g. g. a 3 dB increase). g. a dipole). The apparent power produced by the antenna and transmitter combination is called the effective radiated power (ERP), and is the product of the transmitter power and the antenna gain.

The result is that antenna elements must be shortened a small amount compared to the free space length. If you cut some antennas to a physical length that is comparable to the wavelength of the desired resonant frequency, then you will find that the actual resonant frequency is a tad low – meaning that the antenna is a little bit too long. This effect is almost negligible on the 80 m band, but becomes more substantial at 10 m and downright annoying at 2 m. TRANSMISSION LINES ________________________________________________________________________________________________________________________________________________________ The wire between the antenna and either a transmitter or receiver is called the transmission line.

3 WIRE, CONNECTION, GROUNDS, AND ALL THAT 53 wavelength (j/2), full wavelength (j), and so forth. These lengths are required electrical lengths, and are only found in free space with perfect connectors. In antennas and transmission lines, the VF shortens the physical length required to achieve a specified electrical length. To find the physical length, multiply the required electrical length by the velocity factor. For example, a half wavelength in free space is defined as 150/FMHz, while in a wire it is ð150 Â VFÞ=FMHz .

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