• Title/Summary/Keyword: 원형 모양 안테나

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Design and Manufacture of CPW-fed Two Arc-shaped Antenna for WLAN Applications (WLAN 시스템을 위한 두 개 원호 형태 안테나의 설계와 제작)

  • Yoon, Joong-Han
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.4
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    • pp.765-771
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    • 2015
  • In this paper, a dual-band arc-shaped monopole antenna for WLAN(Wireless Local Area Networks) applications. The proposed antenna is based on CPW-fed structure, and composed of two-arc shaped of radiating patch and ground plane. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator (HFSS) and found the parameters that greatly effect antenna characteristics. Using optimal parameters, the antenna is fabricated. The numerical and experiment results demonstrated that the propnosed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN bands. And measured results of gain and radiation patterns characteristics displayed determined for opeating bands.

Detectivity Improvement of Microbolometer by Coupling 3D Feed Horn Antenna (3차원 피드 혼 안테나 결합을 통한 볼로미터의 감지도 향상)

  • Kim, Kun-Tae;Park, Jong-Yeon;Moon, Sung;Park, Jung-Ho;Park, Jong-Oh
    • Proceedings of the KIEE Conference
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    • 2001.07c
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    • pp.1899-1901
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    • 2001
  • 본 논문에서는 3차원 feed horn 안테나를 볼로미터에 결합함으로써 감지도(Detectivity)를 향상시킨 비가시광 영상 감지 소자를 제안하였다. Feed horn 안테나의 우수한 지향성(Directivity)를 통해서 주위의 잡음 성분을 제거함으로써 감지도의 향상을 확인할 수 있었다. 안테나와 볼로미터와의 결합 손실을 줄이기 위해서 볼로미터의 흡수층의 모양을 원형의 형태로 하였으며 크기도 안테나 폭과 일치를 시켰다. 또한 열적 고립 구조를 만들기 위한 지지 다리의 모양도 원형의 형태로 하여서 전체 길이를 증가 시켰으며 이로 인해 열전도도(Thermal conductance)를 $4.65{\times}10^{-8}$[W/K]까지 낮출 수 있었 다. 설계된 소자의 감지도는 $2.37{\times}10^{9}$[$cm\sqrt{Hz}/W$]을 나타내었으며 안테나 결합을 통한 감지도의 향상을 확인 할 수 있었다. 볼로미터의 제작은 MEMS 기술을 이용한 표면미세가공(Surface micromachining)법으로 열적 고립 구조체를 제작할 수 있으며 3차원 feed horn안테나는 SU-8이라는 음성 감광제를 경사회전노광시켜서 제작할 수 있다.

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Design of a High-Gain Circular-Slit Antenna at 900 MHz (900 MHz 대역 고이득 원형 슬릿 안테나의 설계)

  • Choi, Yeong Seok;Cho, Choon Sik
    • Journal of Satellite, Information and Communications
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    • v.12 no.1
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    • pp.72-75
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    • 2017
  • In this paper, we design the circular slits in the parch antenna for size reduction and high gain working at 900 MHz. Modifying the rectangular type patch, we decrease the antenna real-estate, leading to antenna miniaturization with added circular slits in itself. The antenna is tuned for under -30 dB return loss by adjusting the number of circular slits and their radii, and its design is performed for the maxim bean pattern of 4 dBi gain. Compared with the antenna without circular slits, the designed antenna shows 20 MHz downward shift of frequency, proving that the size reduction is achieved with this antenna design.

An Analytic Solution of a Circular Aperture Antenna with a Feed Transition (급전부에 전이 구조가 있는 원형 개구면 안테나의 엄밀한 해석 방법)

  • Lee Haeng-Seon
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.16 no.10 s.101
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    • pp.982-988
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    • 2005
  • An analytic solution of circular aperture antenna with a feed transition is presented using a hybrid method of generalized scattering matrices and integral transform. The method can give an analytic solution to antennas with integrated filters or mode converters, etc. Scattering matrices and integral transform techniques are combined to accommodate discontinuities connected between an aperture and a feed waveguide, and radiated field from the aperture. The method gives radiation fields as well as return losses of the antenna.

Circularly Polarized Microstrip Antenna Using I-Shape Ground Slot Perturbation and Perpendicular Feeding Network (I-모양 슬롯 섭동과 수직한 급전구조를 이용한 원형 편파 마이크로스트립 안테나)

  • Shin, Yooncheol;Noh, Yoonsang;Lee, Min-Jae;Pyo, Seongmin
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.6
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    • pp.497-500
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    • 2017
  • This paper proposes a circularly polarized microstrip antenna using an I-shape ground slot perturbation and a perpendicular feeding network. The proposed antenna consists of the symmetrical and perpendicular feeding and the microstrip square radiator loaded with the I-shape ground slot perturbation. The left-handed circular polarization(LHCP) formed by a 90-degree phase difference can be radiated by the perpendicular feeding network and the ground slot perturbation. An implemented antenna is designed for the use in the satellite communication system operated in S-band of 2.2 GHz, and is to be the 91 MHz of -10 dB bandwidth. The measured results of the antenna gain, far-field radiation pattern, and axial ratio agree well with the simulation results.

A Study on Dual Circular Polarized Patch Antenna with Compact Size (소형 이중 원형편파 패치안테나에 관한 연구)

  • Yun, Gi-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.7
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    • pp.1537-1543
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    • 2010
  • This paper describes a compact microstrip antenna with dual polarization characteristics. The antenna, receiving both a left-hand circularly polarized(LHCP) wave and a right-hand circularly polarized(RHCP) wave, can be used for a polarization diversity. A diamond-shaped patch with internal empty room is designed for impedance matching as well as size reduction. And slots are added around feeding point to improve input matching. The proposed antenna has been applied to GPS(global positioning system), operating at 1.57GHz. And, the proposed idea has been verified and estimated by simulation. The measurement results show that it has VSWR 2:1 bandwidth of 83MHz, 3dB axial bandwidth of about 58MHz, 3dB beamwidth of 90degree, and gain of 0dBi, respectively, for RHCP. Also, it has similar performances for LHCP.

Design and Manufacture of Modified Ring antenna with Stub and Ground Slot for WLAN Applications (WLAN 시스템에 적용 가능한 그라운드 슬롯과 stub를 갖는 변형된 링 안테나 설계와 제작)

  • Koo, Yung-Seo;Im, Dae-Soo
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.10
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    • pp.2265-2272
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    • 2013
  • In this paper, a dual-band circular ring monopole antenna with stub and ground slot for is proposed WLAN(Wireless Local Area Networks) applications. The proposed antenna is based on a planar monopole design, and composed of one circular ring of radiating patches, and modified feed line, and rectangular slot in the ground plane for dual-band operation. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that effect antenna characteristics. Using the obtained parameters, the antenna is fabricated, and the return loss coefficient, gain, and radiation patterns are determined for WLAN application.

Design of Circular Ring Antenna with Half-Circular Strip for WLAN/WiMAX Applications (WLAN/WiMAX 시스템에 적용 가능한 반원 스트립 구조를 갖는 원형 링 안테나의 설계)

  • Yoon, Joong-Han
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.4
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    • pp.417-424
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    • 2014
  • In this paper, a dual-band circular ring monopole antenna with semi-circular strip for WLAN(Wireless Local Area Networks)/WiMAX(World interoperability for Microwave Access) applications. The proposed antenna is based on a planar monopole design, and composed of half circular strip for dual-band operation which cover WLAN and WiMAX frequency bands. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that greatly effect antenna characteristics. Using the obtained parameters, the antenna is fabricated. The numerical and experiment results demonstrated that the proposed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. And characteristics of gain and radiation patterns are obtained for WLAN/WiMAX frequency bands.

Design and Manufacture of Modified Circular Ring antenna for WLAN/WiMAX Applications (WLAN/WiMAX 시스템에 적용 가능한 변형된 원형 링 안테나 설계와 제작)

  • Lim, Dae-Soo;Yoon, Joong-Han
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.2
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    • pp.268-275
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    • 2014
  • In this paper, a dual-band circular ring monopole antenna with stub and ground slot for WLAN(Wireless Local Area Networks)/WiMAX(World interoperability for Microwave Access) applications. The proposed antenna is based on a planar monopole design, and composed of one circular ring of radiating patch, cross strip in circular ring, modified feed line, and two rectangular slot in the ground plane for triple-band operation. To obtain the optimized parameters, we used the simulator, Ansoft's High Frequency Structure Simulator(HFSS) and found the parameters that greatly effect antenna characteristics. Using the obtained parameters, the antenna is fabricated. The numerical and experiment results demonstrated that the proposed antenna satisfied the -10 dB impedance bandwidth requirement while simultaneously covering the WLAN and WiMAX bands. And characteristics of gain and radiation patterns are determined for WLAN/WiMAX application.

Design of Modified H-slot Aperture-coupled Circular Polarization Microstrip Array Antenna (변형된 H형 슬롯 개구결합 원형편파 마이크로스트립 배열안테나 설계)

  • Park, Ki-dong
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.40 no.7
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    • pp.1363-1368
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    • 2015
  • Aperture-coupled circular polarization microstrip array antenna is proposed in this paper. The proposed antenna is useful for 2.4GHz ISM band and its aperture shape is a modified H-slot. The optimal design parameters for the antenna structure is found by using electromagnetic analysis tool HFSS repeatedly. The HFSS simulation results, such as return loss, axial ratio, radiation pattern and gain of the proposed array antenna are compared with results of the single antenna. It is able to verify that the proposed array antenna is valuable enough to be used in various applications as well as 2.4GHz ISM band.