antenna diversity

Using two or more receiving antennas on a wireless device to eliminate multipath signal distortion. Typically, the signal from the antenna with the least noise (best SNR) is chosen, and the other antenna is ignored. However, there are also methods that use incoming signals from both antennas. It is quite common to see two antennas on 802.11 wireless LAN access points and PC cards. See MIMO, beamforming, signal-to-noise ratio and multipath.

Antenna Diversity for 802.11

Note the dual antennas on the 802.11b access point (top left) and PC card (bottom) from Alvarion. Antenna diversity is an important feature of the 802.11 specification. (Image courtesy of Alvarion Ltd., www.alvarion.com)

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References in periodicals archive

GreenPeak Technologies adds to Qorvo a legacy of engineering and system-level expertise in wireless RF technology, and offers a range of proprietary antenna diversity and multiple receiver architecture technologies.

Qorvo to Acquire Dutch Short-Range RF Communication Specialist GreenPeak

For antenna diversity applications, the RFX2511 features a high-efficiency power amplifier (PA), low noise amplifier (LNA) with bypass mode, Transmit/Receive switch, double- pole, double-throw (DPDT) antenna switch for diversity, and directional power detector circuitries.

RFAXIS UNVEILS CMOS RF FRONT-END ICS FOR IOT

It claimed a zero VoLTE (Voice over LTE) call drop rate, achieved by implementing different antenna designs, namely Close-link Antenna Tube to negate the impact of hand placement over a cellphone's antenna, and Switched Antenna Diversity with primary- and secondary-grade antennae that adapts to available network by optimising reception power.

Qualcomm unveils X12 LTE Modem as part of upcoming Snapdragon 820 SoC

RFaxis initially will provide its RFX2401C reference design, followed by its RFX2411 and future products with antenna diversity. The RFX2401C and RFX2411 are fully integrated, single-chip, single-die RFeICs that incorporate all the RF functionality needed for IEEE 802.15.4/ZigBee, wireless sensor networks, the IP-based Thread mesh networking protocol and other wireless systems in the 2.4 GHz ISM band.

RFAXIS COLLABORATES WITH SILICON LABS

In each measurement epoch four distances (namely d1, d2, d3 and d4) are measured using antenna diversity (also known as space diversity).

The application of ZigBee phase shift measurement in ranging

SiBEAM's UltraGig solution incorporates advanced beam- forming technology and features a unique antenna diversity architecture supporting single or dual-antenna array architecture.

SIBEAM EXPANDS GIGABIT WIRELESS PORTFOLIO

- Use of four-branch antenna diversity receiver technology at cell sites to optimize wireless signal strength.

C SPIRE 4G+ DELIVERS OPTIMAL NETWORK PERFORMANCE

This antenna diversity technology helps provide greater range and coverage compared to more traditional three-antenna devices, so all connected devices can achieve the best performance wherever they are located.

LINKSYS LAUNCHES WRT1900AC, WIRELESS-AC ROUTER

Multiple-input and multiple-output (MIMO) system is a well-known system that exploits the antenna diversity to enhance the bit error rate and the channel capacity in fading environments [10,11].

Code-time diversity for direct sequence spread spectrum systems

It also features multicarrier support for global use, support of static or dynamic IP addressing, secure network functionality and high performance antenna diversity for challenging cellular environments, www.eaton.com.

Eaton