Optimal Design of a Planar-Type Antenna with a Reduced Number of Design Parameters Using Taguchi Method and Adaptive Particle Swarm Optimization

Jeong-Hyeok Lee,Dong-Hyeok Jang,Hyeong-Seok Kim 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

This paper presents a method to optimize the design of a planar-type antenna and reduce the number of design parameters for rapid computation. The electromagnetic characteristics of the structure are analyzed, and Taguchi method is used to identify critical design parameters. Adaptive particle swarm optimization, which has a faster convergence rate than particle swarm optimization, is used to achieve the design goal effectively. A compact dual-band USB dongle antenna is tested to verify the advantage of the proposed method. In this case, we can use only five selected geometrical parameters instead of eighteen to accelerate the optimization of the antenna design. The 10 dB bandwidth for return loss ranges from 2.3 GHz to 2.7 GHz and from 5.1 GHz to 5.9 GHz, covering all the WiBro, Bluetooth, WiMAX, and 802.11 b/g/n WLAN bands in both simulation and measurement. The optimization process enables the antenna design to achieve the required performance with fewer design parameters.

Optimal Design of a Planar-Type Antenna with a Reduced Number of Design Parameters Using Taguchi Method and Adaptive Particle Swarm Optimization

Lee, Jeong-Hyeok,Jang, Dong-Hyeok,Kim, Hyeong-Seok The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.6

This paper presents a method to optimize the design of a planar-type antenna and reduce the number of design parameters for rapid computation. The electromagnetic characteristics of the structure are analyzed, and Taguchi method is used to identify critical design parameters. Adaptive particle swarm optimization, which has a faster convergence rate than particle swarm optimization, is used to achieve the design goal effectively. A compact dual-band USB dongle antenna is tested to verify the advantage of the proposed method. In this case, we can use only five selected geometrical parameters instead of eighteen to accelerate the optimization of the antenna design. The 10 dB bandwidth for return loss ranges from 2.3 GHz to 2.7 GHz and from 5.1 GHz to 5.9 GHz, covering all the WiBro, Bluetooth, WiMAX, and 802.11 b/g/n WLAN bands in both simulation and measurement. The optimization process enables the antenna design to achieve the required performance with fewer design parameters.

구형 도파관의 협벽에 이중 슬롯을 가진 비공진형 슬롯 도파관 안테나의 설계

허문만(Moon-Man Hur) 한국전자파학회 2011 한국전자파학회논문지 Vol.22 No.1

본 논문에서는 구형 도파관의 협벽에 이중 슬롯을 가진 비공진형 슬롯 도파관 안테나를 설계하였다. 설계된 협벽 슬롯 도파관 안테나는 슬롯의 기울임 각도에 의해 복사되는 에너지가 결정되기 때문에, 요구되는 부엽 크기를 만족시키는 복사에너지의 크기 분포가 나오도록 각 슬롯의 기울임 각도를 조정하였다. 기울임 각도의 조정은 기존의 슬롯 도파관 안테나의 설계에서 주로 사용되는 슬롯 컨덕턴스 추출 방법이 아닌, 개개의 슬롯 개구면 필드를 푸리에 변환하여 원전계 복사 패턴을 계산하고, 원전계 복사 패턴으로부터 최대 크기의 분포를 산출하는 방법을 사용하였다. 제안된 방법으로 비공진형 이중 슬롯 도파관 안테나를 설계하고, 실제 제작하여 안테나 성능을 측정, 비교하였다. In this paper, the non-resonant SWG(Slotted Waveguide) antenna with double slots in narrow wall of rectangular waveguide is designed. Because energy radiated from each slot depends upon inclination angle of slot of the designed antenna, inclination angle of each slot is controlled to satisfy the amplitude distribution for required sidelobe level. Instead of the conventional extraction method of slot conductance, this amplitude distribution is made by the proposed method, which employs far-field radiation pattern calculated by Fourier transform of aperture field distribution on slot. The non-resonant double SWG antenna is designed by the proposed method and is manufactured. The antenna performances are measured and compared with the simulated results.

An Antenna Tracking Profile Design for Communication with a Ground station

Donghun Lee,Kyung-Min Lee,Mohammed Irfan Rashed,Hyochoong Bang 한국항공우주학회 2013 International Journal of Aeronautical and Space Sc Vol.14 No.3

In order to communicate with a ground station, the tracking profile design problem for a directional antenna system is considered. Because the motions of the gimbal angles in the antenna system affect the image quality, the main object is to minimize the motion of the gimbal angles during the satellite’s imaging phase. For this goal, parameter optimization problems in the imaging and maneuver phases are formulated separately in the body-frame, and solved sequentially. Also, several mechanical constraints, such as the limitation of the gimbal angle and rate, are considered in the problems. The tracking profiles of the gimbal angles in the maneuver phases are designed with N-th order polynomials, to continuously connect the tracking profiles between two imaging phases. The results confirm that if the vector trace of the desired antenna-pointing vector is within the antenna’s beam-width angle, motions of the gimbal angles are not required in the corresponding imaging phase. Also, through numerical examples, it is shown that motion of the gimbal angles in the imaging phase can be minimized by the proposed design process.

공진 방사체 임피던스 측정을 이용한 고효율 안테나 회로 설계 연구

서동호(Dongho Seo),김용주(Yong Joo Kim),윤원상(Won-Sang Yoon),한상민(Sang-Min Han) 대한전기학회 2022 전기학회논문지 Vol.71 No.1

A new antenna design method with high efficient characteristics is proposed by measuring input impedance of a radiative resonator. By means of a simple de-embedding method, the resonant frequency and input impedance are measured for antenna resonators. Retaining the resonant antenna characteristics, an impedance-matched feedline can be designed. In order to verify the validation, the patch antenna has been implemented with the proposed method. From the experimental results, the proposed antenna design has presented well matching property, a higher antenna gain, and higher radiation efficiency, compared to a reference patch antenna implemented by a conventional design method.

능동형 안테나 시스템의 방열설계에 관한 연구

정용인(Yong-In Joung),권민상(Min-Sang Kwon),류준석(Jun-Suk Ryu),박동명(Dong-Myung Park) 한국항공우주학회 2018 韓國航空宇宙學會誌 Vol.46 No.8

본 연구는 능동형 안테나 시스템의 안정적인 임무수행을 위하여 열적 신뢰성을 고려한 방열설계에 관한 연구이다. 능동형 안테나는 송수신부에 고성능의 고발열 소자들이 존재한다. 안테나의 성능 유지를 위해서는 방열설계를 통해 고발열 소자들에서 발생하는 열을 효과적으로 제거하고, 적정한 온도범위에서 동작할 수 있도록 하여야 한다. 능동형 안테나의 송수신부는 고발열부로 액체냉각을 이용한 방열이 효과적이다. 본 연구에서는 능동형 안테나의 열적 성능을 만족하기 위하여 액체냉각 시스템을 포함한 방열설계를 수행하였으며, 이를 수치해석을 통해 분석, 검증하였다. In this paper, we studied on the thermal design of the active antenna system for stable performance considering thermal reliability. The active antenna has high performance and heat flux elements in T/R modules. Thermal heating of elements in T/R modules has to be dissipated effectively and the antenna has to be operated over the range of suggested temperature by the thermal design. T/R modules of high heat flux in the active antenna can be dissipated effectively by liquid cooling. In this study, we studied on the thermal design including the liquid cooling system to optimize the thermal performance of the active antenna. And the thermal design was verified by numerical analysis.

Thermal Design and Analysis of Unfurlable CFRP Skin-Based Parabolic Reflector for Spaceborne SAR Antenna

박태용,김세영,이동우,정화영,이재은,윤지현,오현웅 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.2

To ensure high-resolution image acquisition for a spaceborne parabolic synthetic aperture radar (SAR) antenna, an appropriate thermal design is important to minimize the thermal distortion of the antenna reflector in severe on-orbit thermal environments. This paper describes the results of a preliminary thermal design and the analysis of a carbon fiber reinforced plastic skin-based unfurlable parabolic reflector for use in a spaceborne SAR antenna. The effectiveness of passive thermal designs for an antenna reflector using different thermal coatings was investigated with on-orbit thermal analyses according to the various antenna look angles to derive the most suitable design for minimizing the thermal gradient of the reflector. This contributes to minimize loss in antenna gain to ensure the SAR performance. In addition, the influence of the solar panel on the thermal gradient of the reflector was also analyzed because it is also important in affecting the thermal distortion.

An Antenna Tracking Profile Design for Communication with a Ground station

Lee, Donghun,Lee, Kyung-Min,Rashed, Mohammed Irfan,Bang, Hyochoong The Korean Society for Aeronautical and Space Scie 2013 International Journal of Aeronautical and Space Sc Vol.14 No.3

In order to communicate with a ground station, the tracking profile design problem for a directional antenna system is considered. Because the motions of the gimbal angles in the antenna system affect the image quality, the main object is to minimize the motion of the gimbal angles during the satellite's imaging phase. For this goal, parameter optimization problems in the imaging and maneuver phases are formulated separately in the body-frame, and solved sequentially. Also, several mechanical constraints, such as the limitation of the gimbal angle and rate, are considered in the problems. The tracking profiles of the gimbal angles in the maneuver phases are designed with N-th order polynomials, to continuously connect the tracking profiles between two imaging phases. The results confirm that if the vector trace of the desired antenna-pointing vector is within the antenna's beam-width angle, motions of the gimbal angles are not required in the corresponding imaging phase. Also, through numerical examples, it is shown that motion of the gimbal angles in the imaging phase can be minimized by the proposed design process.

Wearable textile antennas: investigation on material variants, fabrication methods, design and application

Verena Marterer,Michaela Radouchová,Radek Soukup,Susanne Hipp,Tomáš Blecha 한국의류학회 2024 Fashion and Textiles Vol.11 No.1

With the ongoing miniaturization of wireless devices, the importance of wearable textiles in the antenna segment has increased significantly in recent years. Due to the widespread utilization of wireless body sensor networks for healthcare and ubiquitous applications, the design of wearable antennas offers the possibility of comprehensive monitoring, communication, and energy harvesting and storage. This article reviews a number of properties and benefits to realize comprehensive background information and application ideas for the development of lightweight, compact and low-cost wearable patch antennas. Furthermore, problems and challenges that arise are addressed. Since both electromagnetic and mechanical specifications must be fulfilled, textile and flexible antennas require an appropriate trade-off between materials, antenna topologies, and fabrication methods—depending on the intended application and environmental factors. This overview covers each of the above issues, highlighting research to date while correlating antenna topology, feeding techniques, textile materials, and contacting options for the defined application of wearable planar patch antennas.

자동차 샤크안테나의 재질개선 및 강건설계에 대한 신뢰성 평가

곽반석,박종훈,이상천 한국신뢰성학회 2020 신뢰성응용연구 Vol.20 No.2

Purpose: This paper conducts a reliability assessment to demonstrate the robust design of the proposed automobile shark antenna achieved by removing tis ribs and using Polycarbonate/ Acrylonitrile Butadiene Styrene (PC/ABS), a material that has excellent durability. Methods: Highly acceleration lifetime test (HALT) was applied under conditions that were harsher than those used in standard automobile tests. In addition, vibration durability test of the temperature-humidity cycle and the durability test of thermal shock vibration were conducted to determine whether HALT was faulty. Results: Failure analysis revealed the presence of boss hole cracks and Printed Circuit Board (PCB) malfunction due to bending. As a result of the test, no failure occurred in the low-temperature section. In the high-temperature range, the existing and improved antennas were cracked and bent at 160℃ and 190℃, respectively, and the material suitable for improving the durability of the antenna was PC/ABS. Conclusion: The robust design proposed in this study improved the durability and performance of the antenna.