Antennas & Projects

Read Online or Download Antennas & Projects PDF

Similar radio operation books

Antennas for Information Super Skyways: An Exposition on Outdoor and Indoor Wireless Antennas (Antennas) (Antennas, 12)

The first objective of this booklet is to offer the salient elements of antenna ideas and know-how and relate those to instant communications purposes. it truly is written from a special standpoint, containing a mixture of subject matters - thought, layout and functions of outside and indoor antennas followed in glossy instant communique platforms.

LTE-Advanced Air Interface Technology

Possibilities are handy for pros wanting to research and observe the newest theories and practices in air interface applied sciences. Written through skilled researchers and execs, LTE-Advanced Air Interface know-how completely covers the functionality ambitions and expertise parts studied via 3GPP for LTE-Advanced.

SolderSmoke -- Global Adventures in Wireless Electronics

SolderSmoke is the tale of a mystery, after-hours lifestyles in electronics. invoice Meara began as an ordinary child, from a regular American city. yet round the age of 12 he became interested in electronics, and he hasn't ever been an identical. To make issues worse, while he bought older he grew to become a diplomat. His paintings has taken him to Panama, Honduras, El Salvador, the Spanish Basque nation, the Dominican Republic, the Azores islands of Portugal, London, and, so much lately, Rome.

Extra info for Antennas & Projects

Example text

8 gives specifications for the dual-band vertical. If your existing 40-m vertical is a few inches longer than 32 ft, 3 inches, try using it anyway—a few inches isn’t too critical to performance on 17 m. 47—Dual-band vertical. Use a switch or relay to remove the loading coil from the circuit for lower frequency operation. Adjust the coil tap for best SWR on the higher-frequency band. The radial system should be as extensive as possible. See The ARRL Antenna Book for more information on ground systems for vertical antennas.

L is added to provide an electrical quarter wavelength overall. 50—Some variations in vertical antennas. D is the vertical radiation pattern in the plane of a half sloper, with the sloper to the right. E is the azimuthal pattern of the half sloper (90° azimuth is the direction of the sloping wire). Both patterns apply to 160- and 80-m antennas described in the text. 44 Chapter 20 THE HALF-SLOPER ANTENNA Many hams have had excellent results with half-sloper antennas, while others have not had such luck.

60—Elevation-plane response of a 3-element Yagi placed 1/2 λ above perfect ground at (A) and the same antenna spaced 1 λ above ground at (B). 61—Azimuth-plane pattern of a typical three-element Yagi in free space. The Yagi’s boom is along the 0° to 180° axis. the spacing and tuning of the elements. Element tuning is a function of length, diameter and taper schedule if the element is constructed with telescoping tubing. For any given spacing, there is a tuning condition that will give maximum gain at this spacing.

Download PDF sample

Rated 4.30 of 5 – based on 10 votes