Data for: "A system-level performance evaluation of a reconfigurable filtenna in the presence of in- and out-of-band blockers"

Direct RF sampling has been suggested as a solution for receivers that are flexible in frequency and across standards, while utilising only a single radio frequency front-end. However there are concerns about their robustness in the presence of out-of-band and in-band blockers. Tunable filtennas offer a solution to this, incorporating filtering into the antenna space while providing rejection of unwanted signals. This paper presents a filtenna containing reconfigurable frequency selective surfaces to provide tunable filtering between 1.44 and 1.95 GHz. The filtenna is characterised as an antenna and a filter, showing minimum 18 dB rejection across the principle beamwidths. It is then implemented in a direct RF sampling receiver and is shown to provide sufficient rejection of blockers to cause no degradation in the received error vector magnitude (EVM) and block error rate (BLER) of LTE signals when subject to 5G NR-compliant blocking signals. The in-band blocker performance is also characterised, showing at most 3 dB degradation in EVM and BLER.

直接射频采样（Direct RF sampling）被提出可作为一类解决方案，适配那些在频段适配与跨标准兼容方面具备灵活性、且仅需单个射频前端的接收机。然而，人们对其在带外与带内阻塞信号存在时的鲁棒性尚存担忧。可调谐滤波天线（Tunable filtennas）为此提供了可行方案：将滤波功能集成至天线空间内，同时实现对无用信号的抑制。本文提出一款集成可重构频率选择表面（reconfigurable frequency selective surfaces）的滤波天线，可在1.44 GHz至1.95 GHz频段范围内实现可调谐滤波。该滤波天线分别以天线与滤波器的形式完成性能表征，结果显示其在主波束宽度内的信号抑制能力最低可达18 dB。随后将该滤波天线应用于直接射频采样接收机中，实验表明，当遭遇符合5G新空口（5G NR）规范的阻塞信号时，其可提供足够的阻塞信号抑制能力，不会导致长期演进（LTE）信号的接收误差矢量幅度（EVM）与块错误率（BLER）出现性能退化。此外，本文还对其带内阻塞信号抑制性能进行了表征，结果显示EVM与BLER的最大性能退化仅为3 dB。