• Title, Summary, Keyword: Wideband antenna

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Self-Complementary Spiral Antenna Design Using a Ultra-Wideband Microstrip-to-CPS Balun (초광대역 마이크로스트립-CPS 발룬을 이용한 Self-Complementary 스파이럴 안테나 설계)

  • Woo, Dong-Sik;Kim, Young-Gon;Cho, Young-Ki;Kim, Kang-Wook
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.2
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    • pp.208-214
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    • 2009
  • A design and its experimental result of a wideband self-complementary spiral antenna for UWB USPR(Ultrashort-Pulse Radar) system applications is presented. By utilizing the planar-type ultra-wideband microstrip-to-CPS balun, ultra-wideband characteristics of the inherent spiral antenna are retrieved. Also, the design procedure of the spiral antenna is simplified by performing simple impedance matching between separately designed balun and antenna. The proposed spiral antenna is equiangular self-complementary spiral antenna. The implemented antenna demonstrates widebaad performance for frequency ranges from 2.9 to 12 GHz with the relatively flat antenna gain of 2.7 to 5.3 dB and broad beamwidth of more than $70^{\circ}$. From these result, the possibility of a spiral antenna using a ultra-wideband microstrip-CPS balun is verified.

A Study on Ultra-Wideband Patch Antenna with Modified Barrel Shape (변형된 항아리형 초 광대역 패치안테나의 설계에 관한 연구)

  • Kim, Sun-Hyo;Rhee, Young-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.11 no.3
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    • pp.263-270
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    • 2016
  • This paper implemented an ultra-wideband(: UWB) antenna by using a modified barrel-shaped patch antenna. The designed UWB patch antenna was optimized to match UWB technical specifications by considering the sizes of barrel circle and oval(notch) which is distance between the patch and contact surface and designed antenna was implemented by $10mm(R1){\times}21.8mm$ size. Optimal values on the basis of simulated reflective loss results, the surface current distribution of designed patch antenna was analyzed in order to check operation mode of antenna and wideband mechanism. Experimental results of implemented UWB antenna, Return loss of UWB antenna the voltage standing wave ratio was 2 or less in the 1.775-13.075 GHz band, VSWR in 2 or less. And the maximum gain of approx. 1-3 dBi was found in 3.1-10.6 GHz. This result satisfied the characteristics of ultra-wideband and the proposed antenna will be applicable to an ultra-wideband system.

4×1 Wideband Phase Array Antenna at S-Band (S-대역 4×1 광대역 위상배열안테나에 관한 연구)

  • Yoon, Nanae;Ha-van, Nam;Seo, Chulhun
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.29 no.1
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    • pp.20-23
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    • 2018
  • In this work, an aperture-coupled patch array antenna with wideband characteristics was designed and arrayed in a $4{\times}1$ S-band. The designed antenna structure consists of two layers, and it possesses wideband characteristics achieved using coupling between the two layers. The first layer is comprised of four radiation patches and the second layer has an aperture and a ground plane. The antenna structure possesses 15 % wideband characteristics and the center frequency is at 3.2 GHz. A phase shifter was added to the array antenna to enable beam steering. The proposed phase array antenna was fabricated and measured. Our proposed design enables beam steering up to $35^{\circ}$.

Open-Ended Two-Strip Meander-Line Antenna for RFID Tags

  • Son, Hae-Won;Choi, Gil-Young;Pyo, Cheol-Sig
    • ETRI Journal
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    • v.28 no.3
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    • pp.383-385
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    • 2006
  • A new meander-line antenna consisting of two open-ended strips is proposed for a compact and broadband UHF radio frequency identification tag. An equivalent circuit model for the proposed antenna is derived and used to perform a simple and wideband impedance match to an arbitrary complex impedance of a tag chip without any additional matching network. The performance of the proposed antenna is validated by comparing calculated and measured results, which show good agreement.

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CPW Feed Wideband U-slot Microstrip Antenna

  • Lee, Jong-In;Lee, Byoung-Moo;Yoon, Young-Joong
    • Journal of electromagnetic engineering and science
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    • v.2 no.1
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    • pp.11-15
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    • 2002
  • In this paper, we have proposed the new configuration of wideband antenna using CPW fred lines. The proposed antenna has CPW feed lines and U-slot to achieve wade bandwidth with good impedance matching. The use of CPW feed line can decrease the number of substrates. It is compared with the conventional antenna find by a microstrip fled line. The parameters of CPW fred lines were studied by using the quasi-static approximation which is based on the conformal mapping method. The analysis of CPW discontinuities such as the tapered-step structure and the open ended gap were studied by using the quasi-static approximation which is based on the boundary element method. Also, the equivalent circuit model of multi-layer antenna were proposed using the cavity model. Experiment results of the proposed antenna 7how wide-bandwidth characteristics and good radiation patterns in passband.

Broadband Microstrip Patch Antenna

  • Lee Ho-Jun;Lee Jae-Young;Kim Jong-Kyu
    • Proceedings of the International Microelectronics And Packaging Society Conference
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    • pp.230-233
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    • 2003
  • In this paper, the wideband microstrip patch antennas for the Personal communications Service $(PCS\;:\;1750\~1870\;MHz)$ and International Mobile Telecommunications-2000 $(IMT-2000\;:\;1920\~2170\;MHz)$ dual band are studied. Experimental and simulation results on the dual band antenna are presented. Simulation results are in good agreement with measurements. The experimental and simulation results confirm the wideband characteristics of the antenna. The studied antenna satisfied the wideband characteristics that are required characteristics for above 420 MHz impedance bandwidth for the PCS and IMT-2000 dual band antenna. In this paper, through the designing of a dual band antenna, we have presented the availability for PCS & IMT-2000 base station antenna. An impedance bandwidth of $31\%(VSWR<1.5,\;615\;MHz)$ and a maximum gain of 7dBi can be achieved. The radiation pattern is stable across the passband.

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A 42-GHz Wideband Cavity-Backed Slot Antenna with Thick Ground Plane

  • Lee, Jong-Moon;Cho, Young-Heui;Pyo, Cheol-Sig;Choi, Ik-Guen
    • ETRI Journal
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    • v.26 no.3
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    • pp.262-264
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    • 2004
  • We investigate the characteristics of a wideband and high-gain cavity-backed slot antenna in terms of the reflection coefficients, radiation patterns, and gain. A cavity-backed slot antenna structure includes baffles, reflectors, and thick ground planes. The measured gain and bandwidth of a 10-dB return loss in a cavity-backed $2{\times}2$ array slot antenna with $h_1=2 $mm, d=2 mm are 15.5 dBi and nearly 27%, respectively, at 42 GHz. Baffles and reflectors are used to increase antenna gain, thus reducing the coupling among the slots on the thick ground plane.

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Band-Notched Ultra-Wideband Antenna with Asymmetric Coupled-Line for WLAN and X-Band Military Satellite

  • Lee, Jun-Hyuk;Sung, Young-Je
    • Journal of electromagnetic engineering and science
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    • v.13 no.1
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    • pp.34-37
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    • 2013
  • This paper presents a novel ultra-wideband (UWB) antenna that rejects narrow and broad bands and is suitable for wireless communications. The base of the proposed antenna has a circular patch that can cover the UWB frequency range (3.1~10.6 GHz). The interference issues caused by co-existence within the UWB operation frequency are overcome by a design that uses a parallel-coupled asymmetric dual-line with a circular monopole antenna. The proposed antenna showed a stable radiation pattern, realized gain and reflection coefficient lower than -10 dB across the UWB operation bandwidth except for 5.15~5.85 GHz and 7.25~8.4 GHz. The fabrication, simulation, and measurement results obtained for the proposed antenna were in good agreement with the expected values.

Design of Wideband Square Loop Antenna for DTV Applications (DTV용 광대역 사각형 루프 안테나 설계)

  • Yeo, Junho;Lee, Jong-Ig
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.73-74
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    • 2016
  • In this paper, a design method for a wideband square loop antenna for Digital TV applications is studied. The proposed loop antenna is a square loop antenna combined with circular sectors to connect with central feed points. The input reflection coefficient and gain characteristics of the proposed antenna are analyzed to match with the 75 ohm input impedance for DTV applications. The optimized antenna is designed on FR4 substrate, and it operates in the frequency band of 470-1,300 MHz for a VSWR < 2, which assures the operation in the DTV band(470-806 MHz).

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Planar Slot Wideband Antenna for Multiple Communication Services (다중 통신서비스를 위한 평판 슬롯 광대역 안테나)

  • Park, Dong-Kook;Bataller, Miguel Ferrando
    • Journal of IKEEE
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    • v.24 no.1
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    • pp.90-96
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    • 2020
  • As various communication services have emerged due to the development of mobile communication technology, there is a need for a wideband antenna supporting multiple communication services with one antenna. In this paper, we propose a planar slot wideband antenna that can support all the communication services of 3.1~4.99GHz, the low frequency band of 5G, in addition to the existing communication services such as WiFi, LTE 2300/2500, and WiMAX. Through the simulation, the optimized antenna design parameters were obtained, and the antenna was fabricated to implement an antenna with a frequency bandwidth of 1.96~6.01GHz (S11 <-10dB) and presented the radiation pattern and gain of the antenna. The proposed antenna is a multi-band antenna that can provide all the services of LTE, Wifi, WiMAX, and 5G low frequency bands. It can be used as a repeater antenna in radio shadow area such as buildings, dense areas, and ships.