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

SearchNetworking
SearchSecurity
  • man in the browser (MitB)

    Man in the browser (MitB) is a security attack where the perpetrator installs a Trojan horse on the victim's computer that is ...

  • Patch Tuesday

    Patch Tuesday is the unofficial name of Microsoft's monthly scheduled release of security fixes for the Windows operating system ...

  • parameter tampering

    Parameter tampering is a type of web-based cyber attack in which certain parameters in a URL are changed without a user's ...

SearchCIO
  • e-business (electronic business)

    E-business (electronic business) is the conduct of business processes on the internet.

  • business resilience

    Business resilience is the ability an organization has to quickly adapt to disruptions while maintaining continuous business ...

  • chief procurement officer (CPO)

    The chief procurement officer, or CPO, leads an organization's procurement department and oversees the acquisitions of goods and ...

SearchHRSoftware
SearchCustomerExperience
  • first call resolution (FCR)

    First call resolution (FCR) is when customer service agents properly address a customer's needs the first time they call.

  • customer intelligence (CI)

    Customer intelligence (CI) is the process of collecting and analyzing detailed customer data from internal and external sources ...

  • clickstream data (clickstream analytics)

    Clickstream data and clickstream analytics are the processes involved in collecting, analyzing and reporting aggregate data about...

Close