High-linearity RFIC receiver front-end

通用无线连接使物联网(IoT)能够实现自动化通信 在多个设备之间。但是，必须支持多个无线频段才能实现 全球互联互通。黑莓在目前的无线电接收器设计中支持不同频段的能力 主要受限于对专用前端过滤器的要求，该前端过滤器用于抑制带外 信号。对于物联网设备来说，这个问题更加严重，物联网设备必须在物理上很小，而且价格低廉。这项工作 在此接洽项目中提出的建议有望解决这些限制，并使物联网设备具备 连通性。 所提出的设计是基于以高线性度著称的无源开关混频器。这些 当与反应性元素结合时，混音器也可用作可调过滤器。可调后端过滤有助于 拒绝不需要的拦截器，并降低专用前端过滤器所需的性能。高线性度 旨在降低成本的宽带射频放大器(前端和后端)和基带/中频滤波概念 还将调查用于物联网应用的完整无线电接收器的复杂性。

Universal wireless connectivity is enabling an internet of things (IoT) to realize automated communication between many devices. However, numerous wireless frequency bands must be supported in order to implement connectivity world-wide. BlackBerry's ability to support different bands in their current radio receiver designs is limited primarily by the requirement for dedicated front-end filters, which are used to reject out-of-band signals. The problem is exacerbated for IoT devices which must be physically small and inexpensive. The work proposed in this Engage project is expected to resolve these limitations and enable IoT devices with universal connectivity. The proposed designs are based on passive switching mixers, which are known for their high linearity. These mixers also work as tunable filters when combined with reactive elements. Tunable backend filtering helps to reject unwanted blockers and decrease the performance required from dedicated front-end filters. High-linearity wideband RF amplifiers (front- and back-end) and baseband/IF filtering concepts aimed at reducing the cost and complexity of a complete radio receiver for IoT applications will also be investigated.