Browse Definitions:
Definition

dual Wi-Fi antenna

Contributor(s): Stan Gibilisco

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

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

is the a shortage of wi-fi capacity given the internet requirement, or is one anticipated in the future? is the hyper antenna an answer?
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • PCAOB (Public Company Accounting Oversight Board)

    The Public Company Accounting Oversight Board (PCAOB) is a Congressionally-established nonprofit that assesses audits of public ...

  • cyborg anthropologist

    A cyborg anthropologist is an individual who studies the interaction between humans and technology, observing how technology can ...

  • RegTech

    RegTech, or regulatory technology, is a term used to describe technology that is used to help streamline the process of ...

SearchSecurity

  • spear phishing

    Spear phishing is an email-spoofing attack that targets a specific organization or individual, seeking unauthorized access to ...

  • supercookie

    A supercookie is a type of tracking cookie inserted into an HTTP header by an internet service provider to collect data about a ...

  • email spam

    Email spam, or junk email, is unsolicited bulk messages sent through email with commercial, fraudulent or malicious intent.

SearchHealthIT

SearchDisasterRecovery

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

  • mass notification system (MNS)

    A mass notification system is a platform that sends one-way messages to inform employees and the public of an emergency.

  • disaster recovery as a service (DRaaS)

    One approach to a strong disaster recovery plan is DRaaS, where companies offload data replication and restoration ...

SearchStorage

  • GlusterFS (Gluster File System)

    GlusterFS (Gluster File System) is an open source distributed file system that can scale out in building-block fashion to store ...

  • virtual memory

    Virtual memory is a memory management capability of an OS that allows a computer to compensate for physical memory shortages by ...

  • yottabyte (YB)

    A yottabyte is a measure of theoretical storage capacity and is 2 to the 80th power bytes, or, in decimal, approximately 1,000 ...

SearchSolidStateStorage

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

  • SSD caching

    SSD caching, also known as flash caching, is the temporary storage of data on NAND flash memory chips in a solid-state drive so ...

  • NVDIMM (Non-Volatile Dual In-line Memory Module)

    An NVDIMM (non-volatile dual in-line memory module) is hybrid computer memory that retains data during a service outage.

SearchCloudStorage

  • RESTful API

    A RESTful application program interface breaks down a transaction to create a series of small modules, each of which addresses an...

  • cloud storage infrastructure

    Cloud storage infrastructure is the hardware and software framework that supports the computing requirements of a private or ...

  • Zadara VPSA and ZIOS

    Zadara Storage provides block, file or object storage with varying levels of compute and capacity through its ZIOS and VPSA ...

Close