Quantcast
RADIATION PATTERN OF A DIPOLE

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
4-20 emitted from the ends of the doublet; and (2) maximum radiation comes from the doublet in a direction perpendicular to the antenna axis. This type of radiation pattern is both NONDIRECTIONAL (in a horizontal plane) and DIRECTIONAL (in a vertical plane). From a practical viewpoint, the doublet antenna can be mounted either vertically or horizontally. The doublet shown in figure 4-14 is mounted vertically, and the radiated energy spreads out about the antenna in every direction in the horizontal plane. Since ordinarily the horizontal plane is the useful plane, this arrangement is termed NONDIRECTIONAL. The directional characteristics of the antenna in other planes is ignored. If the doublet were mounted horizontally, it would have the effect of turning the pattern on edge, reversing the patterns given in figure 4-14. The antenna would then be directional in the horizontal plane. The terms "directional" and "nondirectional" are used for convenience in describing specific radiation patterns. A complete description always involves a figure in three dimensions, as in the radiation pattern of figure 4-14. Q17.   What terms are often used to describe basic half-wave antennas? Q18.   If a basic half-wave antenna is mounted vertically, what type of radiation pattern will be produced? Q19.   In which plane will the half-wave antenna be operating if it is mounted horizontally? RADIATION PATTERN OF A DIPOLE.—The radiation pattern of a dipole (fig. 4-15) is similar to that of the doublet (fig. 4-14). Increasing the length of the doublet to 1/2 wavelength has the effect of flattening out the radiation pattern. The radiation pattern in the horizontal plane of a dipole is a larger circle than that of the doublet. The vertical-radiation pattern lobes are no longer circular. They are flattened out and the radiation intensity is greater. Figure 4-15.—Radiation pattern of a dipole.


Electrical News
EEVblog #603 – Gas Sensor Teardown – Dräger Multiwarn II
What’s inside a Dräger Multiwarn II gas detection warning system...
eevblog.com
Can Cities Really Be Tech Centers?
It depends on how you define technology. That is, from...
eetimes.com
PC Prior Art Cited on iPhone
Samsung cited a DOS-based app and an early web server...
eetimes.com
Motorola Solutions' Enterprise Business Sells for $3.45B
Motorola Solutions is selling its enterprise business to Zebra Technologies...
eetimes.com
Bad Assumptions & Why Lithium-Ion Batteries Still Catch Fire
Some charging systems have good temperature accuracy, but no cell-balancing...
eetimes.com
Billion-Dollar BS Degrees
Can anyone ever get rich, and we mean really rich,...
eetimes.com
All About Batteries, Part 6: Zinc-Air
In this article we focus on zinc-air batteries, including their...
eetimes.com
Land Rover SUV Packs Sensors, Lasers, HUD
The new Land Rover Discovery Vision Concept SUV is packed...
eetimes.com
Google's Project ARA Smartphones to Use Lattice ECP5 FPGAs
Lattice ECP3 and ECP5 FPGAs will be used in Google's...
eetimes.com
Google Has Plans for Titan Drones
Titan Aerospace's drones are expected to help deliver Internet connectivity...
eetimes.com
Sensors & Actuators Market Forecast on 11% CAGR to 2018
After a two-year slump, sales of acceleration, yaw, and magnetic...
eetimes.com
Tunable Semiconductors Offer Better Detectors, Solar Cells
Researchers at Georgia State University have published a paper showing...
eetimes.com
IBM Nanowires Add Photonics to Silicon
By straining gallium arsenide nanowires on silicon substrates, IBM demonstrates...
eetimes.com
EE Live! Conference a Big Splash in Silicon Valley
A blogger went to EE Live this month, and this...
eetimes.com
Niche SRAM Sees Steady Demand From Network Gear
While the SRAM market is much smaller than those of...
eetimes.com
Apple's Run at Auto Industry Makes Tier-1 Suppliers Nervous
With Apple looking to enter the automobile market with CarPlay,...
eetimes.com
Minimize Unknowns in ESD Tests
Pass/fail tests don't tell you why a system passed or...
eetimes.com
The Future of Software Patents
With Apple and Samsung reprising their patent fights and the...
eetimes.com
Google Takes Stand Against Apple
Three Google software engineers defended Samsung against charges it infringed...
eetimes.com
Connectivity & Sensors: Smartphone Essentials
What brands of accelerometers, e-compasses, and gyroscopes are in today's...
eetimes.com
   


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +