지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 최현철
- 발행연도
- 2014
- 저작권
- 경북대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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Band notch structures for wideband bowtie antenna are designed in this thesis. First of all wideband bowtie antenna is designed. An ultra-wideband balun is used to increase bandwidth and bowtie was reshaped. The VSWR of wideband bowtie antenna is measured as 2:1 over the wide frequency range of 2 - 12 GHz.
Three different type of band notch structures are designed for different positions of antenna, i.e. rectangular open loop of length λ/2 stub on microstrip line, spur strip of length λ/2 stub on coplanarstrip line and folded of length as λ/4 stub on radiator. The VSWR of antenna with rectangular open loop is measured as 6:1 and radiation pattern attenuation is occurred due to return loss attenuation on WLAN band. In case of spur strip, a channel is added in order to decrease antenna gain on WLAN band. The VSWR of antenna with spur strip is measured as 4:1 and antenna gain attenuation is 10 dB. When folded slit is inserted on radiator, the VSWR is improved as 6:1 and antenna gain also decrease more than 10 dB at designed band.
Dual band notch antenna is also designed using rectangular open loop and folded slit. The proposed dual band notch antenna has a series of desirable feature such as WiMAX and WLAN connectivity without interference.
Three different type of band notch structures are designed for different positions of antenna, i.e. rectangular open loop of length λ/2 stub on microstrip line, spur strip of length λ/2 stub on coplanarstrip line and folded of length as λ/4 stub on radiator. The VSWR of antenna with rectangular open loop is measured as 6:1 and radiation pattern attenuation is occurred due to return loss attenuation on WLAN band. In case of spur strip, a channel is added in order to decrease antenna gain on WLAN band. The VSWR of antenna with spur strip is measured as 4:1 and antenna gain attenuation is 10 dB. When folded slit is inserted on radiator, the VSWR is improved as 6:1 and antenna gain also decrease more than 10 dB at designed band.
Dual band notch antenna is also designed using rectangular open loop and folded slit. The proposed dual band notch antenna has a series of desirable feature such as WiMAX and WLAN connectivity without interference.
목차
Ⅰ. 서론 1Ⅱ. 초광대역 보우타이 안테나 설계 32.1 Coplanarstrip 선로-마이크로스트립 선로 전이구조 32.2 초광대역 보우타이 안테나 설계 5Ⅲ. WLAN 대역 저지 구조 설계 93.1 마이크로스트립 선로 대역 저지 구조 설계 93.2 Coplanarstrip 선로 대역 저지 구조 설계 153.3 복사체 대역 저지 구조적용 안테나 설계 253.4 대역 저지 구조별 이득 감소 특성 비교 32Ⅳ. WLAN, WiMAX 대역 저지 광대역 안테나 설계 37사각 개방 루프, 폴디드 슬릿을 이용한 이중 대역 저지 안테나 설계 37Ⅴ. 결론 42참고 문헌 44영문 초록 46
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