Performance Analysis of E-Band Duplex Transceiver Based on Waveguide Diplexer Filters

This paper presents the influence of bandwidth-dependent deterministic impairments of diplexer filters on the performance of an E-band wireless link. The degradation of performance due to group delay variation and amplitude ripple in the analog front-end transmission chain is considered based on the system-level simulation and compared to measurements. The study involves the impairments characterization and their behavior in a transceiver system. The impairment decomposition method is performed in order to validate the measurements of error vector magnitude for QPSK transmission with variable baud-rates up to 4 GBd. We show that for a given RF bandwidth of 5 GHz, within an E-band RF chain configuration for downlink diplexer filters, the EVM performance related to deterministic linear impairments degrades by 3.3% (2.3 dB), while in case of uplink diplexer filters, it degrades by 4.25% (4.5 dB).