STTR Phase I: Universal Wireless Channel Selection Filter for Enhanced Access to RF Spectrum

这个小型企业技术转让（STTR）第一阶段项目将研究一种超宽带可调谐射频滤波器，用作通用信道选择滤波器，以最大限度地提高频谱利用率。 第一阶段的研究将集中在可调谐移相器设计的高保真度建模，以提供高线性度，低插入损耗和有效的功率利用率。 它还将集中在电路设计的连续可调消除失真的CMOS电路的制造在一个设计，将提供在输入高功率的线性操作，独立于信号调制，编码或信道频率。 目标是设计一种电路，该电路可以小型化以集成在所有类型的手持设备中，以提供最初从700 MHz到3 GHz的连续可调谐接收，并且信道带宽可调谐到20 MHz或更高，以支持当前和未决的以及传统的无线通信标准。 该项目更广泛的影响/商业潜力是它将最大限度地提高无线频谱的承载能力，使其能够在从白色空间到WiFi的频率上得到有效利用。 除了有利于消费者通信，它还将有利于研究和技术教育，以及通过为此类仪器提供连续可调RF滤波器来进行生物医学护理。 连续可调谐的中心频率将允许智能手机和其他软件定义的无线电使用任何频率，与目前使用的开关滤波器组提供的有限信道选择形成对比。 失真消除能力将实现高输入功率下的线性操作，例如从附近的塔接收OFDM信号，防止掉话并提高服务质量。 最终的结果将是最大限度地提高同时用户和提高他们的服务质量，同时减少手持设备的尺寸，重量和复杂性，并提高其可靠性，帮助行业满足消费者的期望，并帮助无线行业的持续增长，2011年出货量超过5亿部智能手机。

This Small Business Technology Transfer (STTR) Phase I project will investigate an ultra-wideband tunable radio frequency filter for use as a universal channel selection filter to maximize spectrum utilization. The research during Phase I will focus on high fidelity modeling of a tunable phase shifter design to provide high linearity, low insertion loss and efficient power utilization. It will also focus on circuit design for continuously tunable cancellation of distortion to fabrication of the circuit in CMOS in a design that will provide linear operation at input high power, independent of signal modulation, coding or channel frequency. The goal is design of a circuit that can be miniaturized for integration in hand held devices of all types to provide continuously tunable reception initially from 700 MHz to 3 GHz, and with a channel bandwidth tunable to 20 MHz and more to support current and pending, as well as legacy, wireless communications standards. The broader impact/commercial potential of this project is it will maximize the carrying capacity of the wireless spectrum, enabling its efficient utilization at frequencies from White Space to WiFi. In addition to benefitting consumer communications, it will also benefit research and technical education, as well as biomedical care by providing continuously tunable RF filters for such instruments. Continuously tunable center frequency will allow smart phones and other software defined radios to use any frequency, by contrast with the limited channel selection provided by the switched filter banks in use today. The distortion cancellation capability will enable linear operation at high input power, such as in receiving OFDM signals from a nearby tower, preventing dropped calls and increasing quality of service. The net result will be to maximize simultaneous users and increase their quality of service while reducing the size, weight and complexity of handheld devices and increasing their reliability, helping the industry meet consumer expectations and aiding continuing growth of wireless industry, which shipped over 500 million smart phones in 2011.