STTR Phase I: Frequency Agile Reconfigurable WWAN/WPAN Radio Design

这个小型企业技术转移(STTR)第一阶段项目将对频率敏捷可重新配置无线电的关键要素进行建模、设计、模拟、开发并向工业合作伙伴过渡，该无线电包括中数据速率无线广域网络(WWAN)无线电和超高数据速率短距离无线个人区域网络(WPAN)无线电。对无线数据的需求很快就会超过可用的射频频谱。虽然可用的新频谱有限，但无线设备射频前端的复杂性已经令人望而生畏，增加更多的射频频段只会增加更多的开关和更多的表面声波(SAW)滤波器。在短期内，拟议工作的频率敏捷方面将使射频前端仅用3个射频前端就可以覆盖从0.8 GHz到5 GHz的整个频谱。本课题的研究重点是可调谐LC滤波器的设计和发射音泄漏的自适应抵消，以及高效瓦级功率放大器的设计。最后，将评估对等自组织无线网络提供对共同感兴趣的大型数据文件的辅助访问的潜力；并将设计一个短距离60 GHz收发器前端，以使整个无线电可以快速重新配置为在0.8-5 GHz或60 GHz下运行。该项目的更广泛影响/商业潜力是，通过允许单个收发器和可调RF滤波器覆盖整个八度频率内的任何频段，频率敏捷的RF前端架构可以显著提高无线前端的成本和性能。该项目的早期回报将是减少无线设备，特别是移动电话前端的射频开关和射频过滤器的数量。随着现代蜂窝电话必须寻址的不同频段的数量增加，其成本增加，并且由于可用的RF开关的开/关阻抗比很小，其射频性能降低。频率捷变射频前端由于降低了射频开关损耗，将提高蜂窝电话的射频性能。这将简化政府发放新频段的S流程，而不考虑无线电的复杂性。该项目的长期商业潜力在于，它能够通过使用WPAN无线电在移动设备之间促进高数据率的自组织网络，从而显著减少通过WWAN传输的数据。

This Small Business Technology Transfer (STTR) Phase I project will model, design, simulate, develop and transition to industrial partners the key elements of Frequency Agile Reconfigurable Radios that incorporate both medium-data-rate wireless wide area network (WWAN) radios and ultra-high-data-rate short-range wireless personal area network (WPAN) radios. Demand for wireless data will soon outstrip available RF spectrum. While limited new spectrum is available, the complexity of wireless device RF front ends is already daunting and adding more RF bands will just add more switches and more surface- acoustic-wave (SAW) filters. In the near term, the Frequency agile aspect of the proposed work will enable RF front ends that can cover the entire spectrum from 0.8GHz - 5GHz with only 3 RF front ends. This research focuses on the design of tunable LC filters coupled with adaptive cancelation of transmit tone leakage and the design of high efficiency watt-level power amplifiers. Finally, the potential for peer-to-peer ad-hoc wireless networking to provide auxiliary access to large data files of common interest will be assessed; and, a short range 60GHz transceiver front end will be designed such that the overall radio can be rapidly reconfigured to operate between 0.8-5GHz or at 60GHz.The broader impact/commercial potential of this project is that a frequency agile RF front end architecture can dramatically improve the cost and performance of wireless front ends by allowing a single transceiver and tunable RF Filter to cover any frequency band within an entire octave of frequency. An early payoff for the project will be the reduction in the number of RF switches and RF filters in the front end of wireless devices, especially cellular phones. As the number of distinct frequency bands that must be addressed by modern cell phones increases, their cost increases and their RF performance decreases because the on/off impedance ratio of available RF switches is small. The frequency agile RF front end will improve the RF performance of cellular phones due to decreased RF switch losses. This would simplify the government?s process to issue new frequency bands without considering radio complexity. The long term commercial potential for the project is its ability to dramatically reduce the data that travels over the WWAN by facilitating high data rate ad-hoc networks between mobile devices using a WPAN radio.