On-Chip Integrated Distributed Amplifier and Antenna Systems in SiGe BiCMOS for Ultra-Large-Bandwidth Transmitters (DAAB-Tx)

用于超大带宽发射机 (DAAB-Tx) 的 SiGe BiCMOS 片上集成分布式放大器和天线系统

• 批准号: 236766176
• 负责人: Professor Dr.-Ing. Frank Ellinger
• 金额: --
• 依托单位: Professur für Hochfrequenztechnik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/236766176?language=en
• 关键词: Chip; Integrated; Distributed; Amplifier; Antenna

Project DAAB was widely successful in the design of ultra-wideband integrated antenna and amplifier receivers over a bandwidth in excess of 100 GHz: the state of the art has been improved in all the key areas. The proposed project DAAB-Tx complements the results of DAAB towards the demonstration of the first wireless transmission over a bandwidth of more than 100 GHz. The project activities will be structured around several approaches: (1) integrate a wideband distributed power amplifier with a broadband antenna; (2) drive an array of antennas centered at adjacent frequencies; (3) drive an array of antennas with distributed active dividers. The distributed multi-antenna approaches can offer several remarkable advantages. (a) The bandwidth requirements of each antenna are relaxed. (b) The overall transmitted power is distributed across the spectrum and each associated amplifier can be optimized to deliver only its share. (c) Recombination of power after amplification is pushed to the air with minimal losses.Regarding the antenna design for single-antenna solutions, emphasis will be given to ultra-broadband antennas. The investigation of broadband artificial magnetic conductors (AMC) will be addressed: this alternative design eliminates the main disadvantage of a standard reflector, which is the limited bandwidth due to the fixed distance of a quarter of the wavelength. Therefore this approach uses the properties of the silicon to focus the radiated energy. For multi-antenna approaches, several antennas at adjacent frequency bands will be designed to work in close proximity to the distributed amplifier and active dividers, e.g. fractal bowties. With multiple antennas on a single chip, coupling between antenna elements and between antennas and electronics will become a very important issue, which will be addressed. To partly mitigate these effects, antennas with different polarization will be considered.The goal of the amplifier design work is to maximize the output power over the broadest possible bandwidth. Distributed topologies will be studied, as they are well fit to drive antennas over a very broad bandwidth, and optimized for maximum output power. In a novel approach, the tapered travelling-wave amplifier will be enhanced with stacked-transistor gain cells, which are suitable for higher-output voltage at a given maximum current. In order to further maximize the output power, the number of elements in the distributed structure will be increased with 2-dimensional travelling-wave amplifiers. Both structures will be adapted to single- and multi-antenna solutions by replacing the output synthetic transmission line with an array of antennas. Finally, active broadband dividers will be implemented by merging the input lines of two tapered travelling-wave amplifiers and used to drive multiple antennas centered at adjacent frequencies.

DAAB项目在设计带宽超过100 GHz的超宽带集成天线和放大器接收机方面取得了广泛的成功：在所有关键领域都提高了最新技术水平。拟议的项目DAAB-Tx补充了DAAB的成果，以展示超过100 GHz带宽的第一个无线传输。项目活动将围绕几种方法进行安排：（1）将宽带分布式功率放大器与宽带天线集成;（2）驱动以相邻频率为中心的天线阵列;（3）用分布式有源分频器驱动天线阵列。分布式多天线方法可以提供几个显著的优点。(a)每个天线的带宽要求被放宽。(b)整个发射功率分布在整个频谱上，每个相关的放大器可以优化为仅提供其份额。(c)放大后的功率转换以最小的损耗被推到空中。关于单天线解决方案的天线设计，重点将放在超宽带天线上。宽带人工磁导体（AMC）的调查将被解决：这种替代设计消除了标准反射器的主要缺点，这是有限的带宽，由于固定的距离的四分之一的波长。因此，这种方法使用硅的特性来聚焦辐射能量。对于多天线方法，相邻频带处的几个天线将被设计为在靠近分布式放大器和有源分频器（例如，分形蝴蝶结）的位置处工作。在单个芯片上具有多个天线的情况下，天线元件之间以及天线与电子器件之间的耦合将成为非常重要的问题，这将得到解决。为了部分地减轻这些影响，将考虑具有不同极化的天线。放大器设计工作的目标是在尽可能宽的带宽上最大化输出功率。分布式拓扑结构将被研究，因为它们非常适合在非常宽的带宽上驱动天线，并针对最大输出功率进行了优化。在一种新的方法中，锥形行波放大器将增强与堆叠晶体管增益单元，这是适合于在给定的最大电流更高的输出电压。为了进一步最大化输出功率，在分布式结构中的元件的数量将增加与二维行波放大器。这两种结构将通过用天线阵列取代输出合成传输线来适应单天线和多天线解决方案。最后，有源宽带分频器将通过合并两个锥形行波放大器的输入线来实现，并用于驱动以相邻频率为中心的多个天线。