• Journal of Advanced Marine Engineering and Technology
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• 제31권7호
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• pp.857-862
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• 2007

A novel compact ultra wideband(UWB) antenna for UWB application is proposed in this paper. The proposed antenna with $22mm{\times}26mm{\times}1.6mm$ covers the entire UWB bandwidth and has band notch characteristic for the frequency band of $5.15{\sim}5.825GHz$ limited by WLAN. The antenna has a concaved ground plane and staircase shape patch to achieve the wide bandwidth, and has an U shape slot with $\lambda/4$ length to notch the band. The return loss and group delay of the proposed antenna are measured.

• 디지털산업정보학회논문지
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• 제9권4호
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• pp.43-49
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• 2013

In this paper, it is designed inverted triangle structural planar monopole antenna with edge and rectangle slot for UWB(Ultra Wide Band) communication (3.1~10.6 GHz) and researched in about 5.8 GHz notch structure to prevent interference between UWB systems and existing wireless systems for using Wi-Fi service. The antenna have broadband property structurally through inverted triangle structural planar monopole which have edge. and rectangle form addition planned notch slot of 1 mm and height 0.1 mm. Monopole and ground of proposed antenna exist on coplanar plane, and excite as CPW. It used FR4 epoxy dielectric substrate of ${\varepsilon}r$=4.4, and the size is $20{\times}20{\times}1.6$ mm dimension. The measured results that are obtained return loss under -10 dB through 3.1~10.6 GHz(7.5 GHz) without Wi-Fi bandwidth and maximum gain of 8.44 dBi at E-plane. Radiation pattern is about the same that of dipole antenna at all frequency. And using notch slot and it will be able to confirm the quality which becomes notch from 5.8 GHz which are a radio LAN frequency range.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.893-895
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• 2013

본 논문에서는 접지면에 역 T형 노치를 넣은 평면형 폴디드 모노폴 안테나를 제안하였다. 제안된 안테나에서는 대역폭을 늘리기 위하여 내부 패치와 외부 패치의 폭들을 점차 넓히는 방향으로 변화를 주었고, 그라운드에 가로와 세로 slit의 길이가 비슷하고 폭은 약 2배 정도 차이가 있는 노치를 넣어 설계 및 모의실험을 하였다.

• 한국통신학회논문지
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• 제42권1호
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• pp.286-290
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• 2017

본 논문에서는 노치 대역 특성을 갖는 UWB 육각형 패치 안테나를 제안하였다. 노치 대역은 WLAN의 5.15 ~ 5.85 GHz 대역이며, 원형 슬릿을 패치에 삽입하여 유도하였다. 제안된 안테나의 임피던스 대역폭은 3.1 ~ 11.85 GHz 대역으로 UWB 통신 시스템의 대역폭을 만족하였으며, 5.2 ~ 5.8 GHz 대역에서 노치 대역 특성을 보였다. 안테나의 방사패턴은 XZ-plane에서 $0^{\circ}$와 $180^{\circ}$에서 지향성의 패턴을 보이며, YX-plane에서 무지향성 패턴을 보인다. 또한, 주파수가 증가할수록 안테나 이득도 증가하며, 노치 대역 구간에서는 안테나 이득이 감소하였다. 제안된 안테나는 두께 1.62 mm, 손실 탄젠트 0.0035, 유전율 4.5를 갖는 TRF-45 기판에 설계되었으며, 설계는 Ansys사의 HFSS를 사용하였다.

• ETRI Journal
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• 제34권5호
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• pp.674-683
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• 2012

We propose a slot antenna consisting of a rectangular slot on the ground plane, fed by a microstrip line with a rectangular-ring-shaped tuning stub that can be deployed in ultra-wideband (UWB) communication systems to avoid interference with wireless local area network (WLAN) communication. Our antenna can achieve a single band-notched property from the 5 GHz frequency to the 6 GHz frequency owing to a controllable band notch that uses L- and J-shaped parasitic elements. The antenna characteristics can be modified to tune the band-notched property (4 GHz to 5 GHz or 6 GHz to 7 GHz) and the bandwidth of the band notch (1 GHz to 2 GHz). Furthermore, the shifted notch with enhanced width of the band notch from 1 GHz to 1.5 GHz is described in this paper. The UWB slot antenna and L- and J-shaped parasitic elements also provide the band-rejection function for reference in the WiMAX (3.5 GHz) and WLAN (5 GHz to 6 GHz) regions of the spectrum. Experiment results evidence the return loss performance, radiation patterns, and antenna gains at different operational frequencies.

• 정보통신설비학회논문지
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• 제2권1호
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• pp.22-29
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• 2003

스트립라인/이중슬롯라인 변환구조에 대한 등가회로모델과 넛치 안테나를 해석하기 위한 segmented method를 제시하였다. 변환구조에 대한 등가회로 모델을 구축하기 위하여 이중슬롯라인에 대한 특성 임피던스, 분산특성과 단락 임피던스에 대한 계산을 통하며 해석적인 해로 근사화하였다. Segmented method는 이중슬롯라인 급전 넛치 안테나의 최적 설계를 구현하기 용이하게 해준다. 설계 예제로 넛치 안테나를 4차 Marchand 밸룬과 이중슬롯라인 급전 넛치 안테나로 분할하여 해석하였으며, 제안된 등가회로모델과 비교하여 타당성을 검증하였다.

• Journal of electromagnetic engineering and science
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• 제10권1호
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• pp.39-44
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• 2010

In this paper, a compact wideband antenna with a band-notch function is proposed. It operates over the UWB band with a band-stop characteristic. To increase the impedance bandwidth, a ring-shaped radiator is used. By attaching a circular stub to the ring-shaped radiator, the band-notch performance is obtained. The proposed antenna operates over a frequency range from 2.7 GHz to 11 GHz to satisfy the 10-dB return-loss requirement and provides band-stop performance in the frequency band from 5.15 GHz to 6.1 GHz. Experimental results reveal that the proposed antenna exhibits good radiation performance and is suitable for UWB applications.

• KIEE International Transactions on Electrophysics and Applications
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• 제3C권5호
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• pp.194-198
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• 2003

A wide-band E-plane notch phased array antenna having bandwidths of 3:1 and a scan volume of $\pm$ 45 is designed considering the active element pattern (AEP) with analysis of the full structure of E-plane notch phased array antenna. Using the numerical E-plane waveguide simulator as an infinite linear array in the broadside angle, the active reflection coefficient (ARC) of the unit element is optimized in the design frequency range. To evaluate the convergence of the AEP, the simulation of full array as changing the number array is investigated, and the minimum numbers of array that have characteristics similar to the AEP of an infinite array are determined.

• 한국전자파학회논문지
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• 제16권2호
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• pp.199-203
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• 2005

본 논문에서는 Ultra-Wideband(UWB)통신을 위한 새로운 소형 주파수 대역 저지 안테나를 설계 및 제작한다. 설계된 안테나는 초광대역 특성을 만족하면서, IEEE 802.11a와 HIPERLAN/2에 의해 사용이 제한된 $5.15\~5.825\;GHz$에서 주파수 대역 저지 특성을 갖는다. 안테나의 광대역 특성을 얻기 위해서 요철 모양의 접지면을 구현하였고, 또한 제한된 주파수 대역에서 저지 특성을 갖기 위해 U모양의 얇은 슬랏을 사각형 복사 패치 위에 구현 하였다. 제작된 안테나는 저지 대역인 $4.92\~5.866\;GHz$을 제외하고 $2.95\~11.7\;GHz$ 대역에서 정재파비 2 이하를 만족하는 광대역 특성을 나타낸다.

• 한국산업정보학회논문지
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• 제18권1호
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• pp.11-17
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• 2013

A design method to achieve multiple band-rejection characteristics in a wideband circular slot antenna is presented. First, a wideband circular slot antenna fed by a coplanar waveguide is designed to operate in the frequency range between 2.3 and 11GHz, which covers WLAN, WiBro, WiMAX, and UWB frequency bands. Next, resonant frequency variations of rejection bands are examined with respect to different slot locations and lengths when slots are inserted on the ground conductor and the circular patch of the antenna. When arc-shaped slots are placed close to the circular transition from a feeding part, multiple notch bands are obtained. In this case, a half of the guided wavelength of the first notch band corresponds to the slot length and other notch bands are integer-multiple of the first band. Single notch band can be obtained when the slot is located off the transition part. Based on this study, a wideband circular slot antenna with five band-rejection frequency bands at 2.45, 3.5, 4.9, 7.35, and 9.8GHz is designed and fabricated. The first arc-shaped slots are located in the ground conductor close to the circular transition from a feeding part to generate notch bands at 2.45, 4.9, 7.35, and 9.8GHz, while the second slot for 3.73 GHz is placed on top side in the circular patch. The proposed design method is validated by good agreement between the simulated and measured results.