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Qorvo QPF7200 2.4GHz Wi-Fi Front End Module Qorvo RFPA5542 5GHz Wi-Fi Power Amplifier Module 802.11a/n/ac Key Features: • Fully integrated FEM includes highly selective BAW filters achieving FCC bandedge and coexistence attenuation over operating conditions • 37dB Tx gain • Pout = +25dBm, 802.11n, MCS7 -30dB EVM (bandedge compliant Ch1-11) Key Features: • Pout = 23dBm, 5V, .11ac 80MHz MCS9 @ 1.8% EVM • Gain = 33dB • 50Ω input and output matched multiple access (OFDMA) (borrowed from Long Term Evolution (LTE) cellular technology), and higher-rate quadrature amplitude modulation (1024-QAM) to ensure the most efficient use of the available spectrum. IEEE 802.11ax also provides an increase in symbol duration from the 3.2µs for legacy versions to 12.8µs and includes the option for a longer guard interval (GI) of 3.2µs. Technical Benefits IEEE 802.11ax's dual-band capability allows users to choose between the 2.4GHz allocation's longer propagation range or the lower congestion of the 5GHz allocation. Support for a full range of channel widths and narrower sub- channels divides the available spectrum, ensuring good service to users in dense deployments. IEEE 802.11ax supports up to 8 x 8 MU- MIMO connections for both downlink and uplink, which allows an access point to simultaneously transmit and receive data from up to eight users. Previously MU- MIMO was limited to downlink connections only. The new amendment combines MU-MIMO with an uplink resource scheduler to ensure that boosting the data rate around 30 percent in comparison to IEEE 802.11ac and multiplying the capacity of each access point up to fourfold, for a faster, more reliable user experience. In addition, because it brings significant efficiency enhancements, IEEE 802.11ax will assist in situations where cellular network coverage is poor or in handling some of the wireless traffic load when a network is congested. Technical Enhancements IEEE 802.11ax takes advantage of both the 2.4 and 5GHz channels. (Previously, IEEE 802.11n was the only dual-band version of Wi-Fi.) Like other Wi-Fi amendments, IEEE 802.11ax is backward compatible with legacy Wi-Fi devices operating in the same band. The technology supports 20, 40, 80, 80 + 80, and 160MHz-channel widths and introduces a sub-channel width of 78.125kHz (compared to 312.5kHz for previous versions). IEEE 802.11ax gains much of its spectral efficiency increase by combining a higher single-stream data rate with more spatial streams, multiple channels, and an increased number of sub-channels. The amendment also takes advantage of multi-user multiple input/multiple output (MU-MIMO), orthogonal frequency-division uploads from different users don't clash. Previously, legacy versions required that devices wait for an "all-clear" signal before transmission. In the event of interference, devices reverted to a back-off procedure and again listened for the all-clear signal before transmitting. In dense deployments, collision avoidance limited the quality of service. The new "managed" approach addresses this problem while improving resource allocations and aiding efficiency. The introduction of OFDMA allows the OFDM sub-channels used in previous amendments to be further split into four, increasing the number of multiple users who receive service simultaneously, despite their varying bandwidth needs. The 1024-QAM modulation allows each packet to carry more information and is available with 3/4 and 5/6 coding rates, which results in about a 30 percent throughput gain compared to IEEE 802.11ax alone. The data rate of a single stream that uses an 80MHz channel (the highest modulation rate of 1024-QAM) along with a 5/6 coding rate and guard interval of 0.8µs is around 600Mbps. Taking advantage of the technology's eight streams and 160MHz channel bumps the data rate to 9.6Gbps. 17

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