How do I design the RF front end for a Wi-Fi 7 device that supports 320 MHz channel bandwidth?

Designing the RF front end for a Wi-Fi 7 (IEEE 802.11be) device that supports 320 MHz channel bandwidth requires an RF architecture that can capture, filter, amplify, and digitize a 320 MHz-wide signal with sufficient dynamic range and spectral purity for 4096-QAM modulation. The key design challenges are: filter bandwidth (the RF bandpass filter must pass 320 MHz while rejecting signals from adjacent channels and other radio bands; at 5 GHz: a 320 MHz filter requires a fractional bandwidth of approximately 6%, which is achievable with coupled-resonator filters; at 6 GHz (Wi-Fi 6E/7 UNII-5 to UNII-8): the filter requirements are relaxed because the 6 GHz band is less congested than 5 GHz), LNA design (the LNA must provide low noise figure (less than 2 dB) across the full 320 MHz bandwidth with sufficient linearity to handle strong adjacent-channel signals; the IIP3 must be high enough to prevent intermodulation products from adjacent 160 MHz or 80 MHz channels from falling into the desired 320 MHz channel; typical requirement: IIP3 greater than -5 dBm for consumer devices and greater than +5 dBm for enterprise APs), ADC sampling requirements (the 320 MHz bandwidth requires an ADC with at least 640 MSPS (Nyquist) and practically 800-1000 MSPS with oversampling; for 4096-QAM (12 bits per symbol): the ADC requires at least 12-bit resolution with an ENOB (Effective Number of Bits) greater than 10 bits at the 320 MHz input frequency; the ADC's SFDR must exceed approximately 70 dBc to support 4096-QAM), and the receiver architecture (a direct-conversion (zero-IF) architecture is standard for WiFi: the 320 MHz RF signal is mixed directly to baseband, producing I and Q signals with 160 MHz bandwidth each; the IQ imbalance must be less than 0.5 dB amplitude and less than 2 degrees phase for 4096-QAM EVM requirements of approximately -38 dB).