Wireless LANs have experienced phenomenal growth during the past several years. The new wireless LAN standard (IEEE 802.11N [1]) promises both higher data rates and increased reliability. The standard is based on Multiple Input Multiple Output (MIMO) technology wherein antenna arrays are used on transmit and receive with digital signal processing to exploit multipath propagation in a wireless channel. A critical challenge in implementing this technology is incorporating compact antenna arrays into access point and client solutions without compromising system requirements and performance. A cost effective solution has to a) support both WiFi bands (2.4-2.48GHz, 4.9-6GHz) b) be planar and c) easy to integrate.
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