---Cheap Computer---Wireless Networking Serving Computer and Electronic Enthusiasts!
 
     Computers icon         Electronics             PC Parts            Accessories            Laptops iconicon icon icon     HOME 

Wireless Categories

Access Points
Wireless Adapters
Antennas
Accessories

Bluetooth
Network Cameras
Wireless Ethernet Bridges
Media Players
Wireless Routers
Print Servers
Wi-Fi Finders
Range Extenders


Barebone Kits
Cables
Cameras
Computer Cases
Desktop Computers
CD / DVD Burners
Cooling Product 
CPUs
Digital Frames
Flash Memory 
Gaming
GPS
Hard Drives
HD Enclosures
Home Theatre
Ink / Toner
Keyboard / Mice Laptops_Notebooks
Media CD DVD
Memory RAM
Microsoft
Modems
Monitors / LCDs
Motherboards
MP3 / iPod
Networking
Power Protection
Power Supplies
Printers
Projectors
Remove Storage
Scanners
Servers
Software
Sound Cards
USB Flash Drives
Video Cards
  Wireless Networksicon

Wireless Antennas and Accessories

An antenna is a component of radio, television, and radar systems that directs incoming and outgoing radio waves. Antennas were invented in the 1880s by Heinrich Hertz; Guglielmo Marconi made many improvements. Antennas range in shape and size from the huge mast like devices used for radio and television broadcasting to the large parabolic reflectors used to focus satellite signals and the radio waves generated by distant astronomical objects and reflect them toward the centrally located receiver.
 

  Wireless networking antennas do the same thing. They receive the incoming network signals and then send out the signal so the computer can receive and then do something with it. Some wireless antennas are clearly visible and some are not even seen. The standards for wireless is dynamic and getting better all the time.
 
The IEEE 802.11n-2009 is an amendment to the IEEE 802.11-2007 wireless networking standard. It improves the network throughput over the previous standards, such as 802.11b and 802.11g. It has a significant increase in the maximum raw data rate from 54 Mbit/s to a maximum of 600 Mbit/s with the use of four spatial streams at a channel width of 40 MHz.

Since 2007, the Wi-Fi Alliance has been certifying interoperability of "draft-N" products based on what was draft 2.0 of IEEE 802.11n specification. The Alliance has upgraded its suite of compatibility tests for some enhancements finalized after draft 2.0. Furthermore, it has affirmed that all draft-n certified products remain compatible with the products conforming to the final standards.

Reasons to Use a Directional Wireless Antenna

Most if not all wireless access points and wireless routers come with the standard Omni -directional rubber duck wireless antenna. Omni directional antennas used in the wrong situations are such a waste of money and can be a security risk. Directional antennas can be used to focus your signal where it’s needed.

Reasons to use a directional antenna:

1. Save money- Long hallways are common in office buildings. Don’t try to use the defualt Omni directional antennas on a long hallway. You will have to purchase more equipment to extend the bubble of coverage. One directional antenna with a 60 degree focused signal would be able to extend your coverage area twice as far

2. Security- When your wireless signal bleeds outside your operational area you will attract hackers, crackers, leeches, war drivers and social engineers. The higher the DBI on the antenna the more focused your signal is, so if you have an 8dbi antenna your probably looking at a 60 degree cove or signal coming from your antenna. A 14dbi antenna might have a 30 degree focused signal that might not provide the width of coverage you need and it might send your signal to far.

3. Less Equipment - Cut down on your equipment that you have to install and manage

4. Shoot Signals around corners - Take an access point, two panel directional antennas and a signal splitter ( The splitter will allow you to hook two antennas to one access point). Now you can mount the directional antennas on a corner mount, shooting the signal down two hallways at onced. This solution is very common and will save you money.

5. Distance - Omni directional antennas usally have half their signal wasted by walls. Directional antennas don’t have that waste they focus their signal in one direction thus extending your signal much farther that an Omni. There are two different types of directional antennas: directional and highly directional.

6. Smaller Profile - Omni directional antennas are hard to blend into an office enviroment or building. They stick out like a sore thumb and advertise your wireless network to everyone. Directional antennas like the panel type have a smaller profile and often look like lights or smoke detectors.

This articles purpose isn’t saying that there isn’t a purpose for omnidirectional antennas. What I”m saying is that most people don’t even think of changing their antennas after purchasing their wireless router or access point. My next article will discuss the advantages of combining directional antennas and Omni directional antennas.

 

 



 

Linksys WRT54G2 Wireless G Router - 54Mbps, 802.11g, 4-Port icon icon
$49.99

 
D-Link DIR-685 Xtreme N Storage Router
$229.99

 
IOGEAR GBU421 Bluetooth 2.0 USB Micro Adapter
$19.99

 
 Trendnet TEW-647GA Wireless N Gaming Adapter
$54.99



icon

Copyright © 1997  netjohn.com  All Rights Reserved.

Information

AMD Socket A   AMD Socket 754   Intel Socket 478   Intel 775   Socket 370   XPC Form Factor    VIA-Cyrix    Cases   BIOS    Motherboards   Computer Memory
CDR-CD-RW    Floppy Drive    Hard Drives   Video Cards    Sound/Speakers   Keyboard/Mouse    Printers
  Partners Directory   News Articles