Flapping-Wing Micro Air Vehicles(FMAVs)are compact and agile,capable of accessing narrow spaces that conventional vehicles struggle to reach,such as ruins,caves,or the interiors of complex structures,making them ideal...Flapping-Wing Micro Air Vehicles(FMAVs)are compact and agile,capable of accessing narrow spaces that conventional vehicles struggle to reach,such as ruins,caves,or the interiors of complex structures,making them ideal tools for reconnaissance and rescue missions.1 However,the operation of FMAVs relies on coordinating multiple forces with different scaling effects,posing challenges to miniaturization design.展开更多
Characteristics of a single-feed dual-frequency bow-tie microstrip antenna are studied. By using the variation method, simple formulas for resonant frequencies of the bow-tie microstrip antenna are derived. It is show...Characteristics of a single-feed dual-frequency bow-tie microstrip antenna are studied. By using the variation method, simple formulas for resonant frequencies of the bow-tie microstrip antenna are derived. It is shown that the dual-frequency ratio can be controlled easily by choosing the parameters of the antenna. This design gives compact antenna size and simple antenna structure. Experimental results are presented, verifying the validity of the design.展开更多
Micromachining miniature microphone is one of the most challenging tasks in research and development today. For micromachining membrane, there is a significant internal (residual) stress, which strongly decreases the...Micromachining miniature microphone is one of the most challenging tasks in research and development today. For micromachining membrane, there is a significant internal (residual) stress, which strongly decreases the mechanical sensitivity of membrane. As predicted by theoretical analysis and numerical simulation, a corrugated diaphragm can greatly increase the mechanical sensitivity of the microphone diaphlagms due to the reduction of the initial stress effect without changing the process conditions. A silicon condenser miniature for crophone with corrugated diaphragm has been designed, fabricated and tested. The fabrication process is simple, efficient and fully compatible with standard IC process. Wafer level measurement has been carried out. An open circuit sensitivity of 40 my/Pa up to 7 kHz could be achieved under a low bias voltage of 10 V with only 1.5× 1.5 mm2 chip area. The preamplifier and subsequent signal process circuits are expected to be integrated in the same chip to make a complete micro-acoustic system.展开更多
基金supported by the Scientific Research Innovation Capability Support Project for Young Faculty,China(No.ZYGXQNJSKYCXNLZCXM-D1)the National Natural Science Foundation of China(No.52272384).
文摘Flapping-Wing Micro Air Vehicles(FMAVs)are compact and agile,capable of accessing narrow spaces that conventional vehicles struggle to reach,such as ruins,caves,or the interiors of complex structures,making them ideal tools for reconnaissance and rescue missions.1 However,the operation of FMAVs relies on coordinating multiple forces with different scaling effects,posing challenges to miniaturization design.
文摘Characteristics of a single-feed dual-frequency bow-tie microstrip antenna are studied. By using the variation method, simple formulas for resonant frequencies of the bow-tie microstrip antenna are derived. It is shown that the dual-frequency ratio can be controlled easily by choosing the parameters of the antenna. This design gives compact antenna size and simple antenna structure. Experimental results are presented, verifying the validity of the design.
文摘Micromachining miniature microphone is one of the most challenging tasks in research and development today. For micromachining membrane, there is a significant internal (residual) stress, which strongly decreases the mechanical sensitivity of membrane. As predicted by theoretical analysis and numerical simulation, a corrugated diaphragm can greatly increase the mechanical sensitivity of the microphone diaphlagms due to the reduction of the initial stress effect without changing the process conditions. A silicon condenser miniature for crophone with corrugated diaphragm has been designed, fabricated and tested. The fabrication process is simple, efficient and fully compatible with standard IC process. Wafer level measurement has been carried out. An open circuit sensitivity of 40 my/Pa up to 7 kHz could be achieved under a low bias voltage of 10 V with only 1.5× 1.5 mm2 chip area. The preamplifier and subsequent signal process circuits are expected to be integrated in the same chip to make a complete micro-acoustic system.
