Browse Definitions :
Definition

dual Wi-Fi antenna

A dual Wi-Fi antenna is a pair of identical antennas on a wireless router or Wi-Fi-equipped device, intended to eliminate signal fading and dead spots. Dual Wi-Fi antennas operate on a principle known as antenna diversity, which offers two different reference points for signal reception or transmission (or both) and uses the better one. These systems all operate on the principle of antenna diversity, which engineers have exploited in long-distance communications systems for decades.

When a Wi-Fi device operates in an indoor environment, the electromagnetic waves (radio-frequency signals) reflect from various metallic objects such as electrical wires, steel beams, and household appliances. The signal arriving at the receiving end of the circuit therefore comprises several different component waves that rarely, if ever, perfectly reinforce each other. At certain points in space, the components effectively cancel each other out, producing dead spots. (This effect can occur even if the router and the end-user device lie on a direct line of sight but far away from each other, because reflected signal components inevitably exist in addition to the line-of-sight signal.) If both devices have single antennas, the user can experience considerable frustration. In severe cases, a drop-out (and consequently a lost connection) can occur even if the user moves by only a few centimeters, or changes the angle in which the device is held.

A dual antenna on either the router or the end user device offers a solution to the problem of Wi-Fi fading, dead spots, and drop-outs. If one of the antennas falls into a dead spot, the device can switch to the other antenna, which will most likely provide a usable signal. The Wi-Fi system constantly monitors the signals from both antennas and automatically uses the stronger of the two. A dual Wi-Fi antenna requires additional hardware and integration compared with a single antenna, but many users find that the performance improvement justifies the increase in complexity and cost.

This was last updated in July 2012

Continue Reading About dual Wi-Fi antenna

SearchCompliance
  • pure risk

    Pure risk refers to risks that are beyond human control and result in a loss or no loss with no possibility of financial gain.

  • risk reporting

    Risk reporting is a method of identifying risks tied to or potentially impacting an organization's business processes.

  • chief risk officer (CRO)

    The chief risk officer (CRO) is the corporate executive tasked with assessing and mitigating significant competitive, regulatory ...

SearchSecurity
  • encryption key

    In cryptography, an encryption key is a variable value that is applied using an algorithm to a string or block of unencrypted ...

  • payload (computing)

    In computing, a payload is the carrying capacity of a packet or other transmission data unit.

  • script kiddie

    Script kiddie is a derogative term that computer hackers coined to refer to immature, but often just as dangerous, exploiters of ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • fault-tolerant

    Fault-tolerant technology is a capability of a computer system, electronic system or network to deliver uninterrupted service, ...

  • synchronous replication

    Synchronous replication is the process of copying data over a storage area network, local area network or wide area network so ...

SearchStorage
  • cloud NAS (cloud network attached storage)

    Cloud NAS (network attached storage) is remote storage that is accessed over the internet as if it is local.

  • Terabyte (TB)

    A terabyte (TB) is a unit of digital data that is equal to about 1 trillion bytes.

  • object storage

    Object storage, also called object-based storage, is an approach to addressing and manipulating data storage as discrete units, ...

Close