A5100628482- Scheduling and Optimization Algorithms
- Advanced Manufacturing and Logistics Optimization
- Antenna Design and Analysis
- Manufacturing Process and Optimization
- BIM and Construction Integration
- Optimization and Search Problems
- Bluetooth and Wireless Communication Technologies
- Advanced Combustion Engine Technologies
- Industrial Technology and Control Systems
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Industrial Vision Systems and Defect Detection
- Supply Chain and Inventory Management
- Engineering Applied Research
- Transportation and Mobility Innovations
- Energy Harvesting in Wireless Networks
- Vehicle Routing Optimization Methods
Kumoh National Institute of Technology
2011
Yonsei University
2000
It is being more serious problems that the pollutant and greenhouse gas emitted from internal combustion engines due to increasing demand of automobiles. To counteract this, as one ways has been studied, GDI type engine, which directly injected into chamber burns by a spark ignition chose merits both gasoline engine diesel was appeared. The phenomena in this known contribute stability, fuel consumption reduction reductions harmful substances exhaust emission, when spray atomization favorable...
A novel broadband planar inverted-L antenna with parasitic element is presented. The Proposed structure of the paper type fabricated on flexible PCB. polyimide film which has 25 μm thickness and 3.5 dielectric constant used as a substrate for antenna. proposed operating band 572 MHz covers Wibro, Bluetooth, wireless CATV transmission, Satellite DMB, Wi-Fi WiMAX.
본 논문에서는 MZR(Mu Zero Resonator)을 사용하여 소형 휴대용 무전기 안테나 설계 및 구현이다. MZR 공진기의 병렬 커패시턴스에 의해서 1차 영차 공진주파수를 조정하여 대역폭을 개선하였다. 또한 케이스와 시스템 보드 조립을 위해 사용한 도체 부도체 보조구조물에 의해 면적이 6.9% 감소하였다. 제한요소를 고려하여 안테나를 설계하여 측정한 결과, 10dB 대역폭은 400MHz 이상, 최대 이득은 1.26dB, 방사패턴은 모두 전방향 특성을 나타내었다. 무전기와 인체 사이의 거리가 50mm일때 300MHz 감소하였고, 공진주파수는 20MHz 이동하였다. 따라서 MZR의 커패시턴스와 보조 구조물과 접지면이 무한히 넓은 CPS 구조를 안테나는 외부 인체에 대한 강한 내성을 갖음으로 소형무전기에 적용이 가능한 아주 작은 구현이 가능함을 확인하였다.