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Focus scanning is critically important in many terahertz (THz) imaging and sensing applications. A traditional single focusing transmitarray can achieve a good focus when the source is on-axis but moving the source off-axis produces a significant aberration. This paper presents a novel approach to reducing coma in off-axis scanning in the THz region. Here, a dual transmitarray solution is proposed, in which a transmitarray with an optimized phase profile is placed behind a regular phase profile transmitarray. A linearly polarized, dual-transmitarray antenna was fabricated for validation, and the focusing performances were experimentally characterized. The measured results are in good agreement with the theoretical ones. The generated spot of the dual-transmitarray antenna remains focused on an angle up to 50deg, with a -3 dB spot size of less than 4 mm at 290 GHz. The measured near-field sidelobes are all below -10 dB within the whole scanning range., Comment: 9 pages, 14 figures

Macau, as a society, is a crossroads where East–West encounters have been taking place for centuries. This paper examines some of the contemporary issues and implications for moral education. After a brief introduction to the social background of Macau, the paper describes the characteristics of Macau's education in general and the development of its moral education in particular. This has taken place in the context of the strong influences on morality of both Catholicism and Confucianism. An outline of the current curriculum of moral and civic education is followed by a critical appraisal of its implementation over the last few years. By means of this case study of Macau, the paper argues that a communitarian‐oriented morality in Macau is justified, and it also suggests how, by turning attention to its history, a minimal set of values can be constructed for Macau's particular social setting. Finally, some further educational challenges for Macau's future moral and civic education are reviewed.