• Title/Summary/Keyword: Waveguide Antenna

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High Aperture Efficiency nat Antenna using Annular Ring Resonators and Radial Waveguide feeder Network (환상형 공진기와 방사형 도파관 급전구조를 이용한 고효율 평면안테나에 관한 연구)

  • Jeong, Ki-Hyeok;Ra, Keuk-Hwan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.8A
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    • pp.688-696
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    • 2005
  • An antenna was designed and manufactured for the DBS receiver system. This antenna is a planar or flat antenna which shows many advantages over the conventional parabolic antenna such as higher aperture efficiency, easier installation and improved aesthetics to name a few. The antenna is a novel design employing microstrip annular ring resonating antenna elements and a radial waveguide feeder network. The LNB(Low Noise Blockdown Converter) is can integrate with the antenna iしt the back of the radial waveguide. The 35cm diameter antenna works at 31.8dBi minimum gain which implies an aperture efficiency of around $80\%$.

A Study on the Array Antenna for Satellite Broadcasting Receiver (위성방송 수신용 배열안테나에 관한 연구)

  • 신용주;강기조;이학용;김종규;김종헌;이종철;김남영;박면주;이병제
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.8
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    • pp.787-795
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    • 2003
  • Three types of array antennas are developed for broadcasting band of Koreasat III. First, the specification of the array antenna is decided. Second, characteristics and advantages of three types of antennas using the radial waveguide characteristics is investigated and discussed. Third, design method fur those antenna is studied to meet antenna specifications, and then antennas are designed and tested. Finally, it is concluded that these types of antennas can be efficiently design compared to both parabola antennas and microstrip array within the limited size.

Enhanced-Gain Planar Substrate-Integrated Waveguide Cavity-Backed Slot Antenna with Rectangular Slot Window on Superstrate

  • Kang, Hyunseong;Lim, Sungjoon
    • ETRI Journal
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    • v.36 no.6
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    • pp.1062-1065
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    • 2014
  • A novel substrate-integrated waveguide (SIW) cavity-backed slot antenna is proposed in this study to achieve enhanced-gain performance. The peak gain is remarkably improved with the use of an SIW cavity and metallic superstrate. The superstrate comprises a single rectangular slot window and two half-wavelength patches. The gain can be enhanced by combining the in-phase radiating fields. Further, the 10 dB bandwidth of the proposed antenna ranges from 2.32 GHz to 2.49 GHz, which covers the wireless local area network band. The measured peak gain is 9.44 dBi at 2.42 GHz.

Array Antenna Design for Ku-Band Terminal of L.E.O Satellite Communication

  • Kang, Seo;Kang, JeongJin;Rothwell, Edward J.
    • International journal of advanced smart convergence
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    • v.11 no.4
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    • pp.41-46
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    • 2022
  • This study is a Ku-band array antenna for the manufacture of low-orbit satellite communication terminals, designed to have miniaturization, high gain, and wide beam width. The transmission of low-orbit satellite communication has a right-rotating circularly polarized wave, and the reception has a left-rotating circularly polarized wave. The 4×8 array antenna was separated for transmission and reception, and it was combined with the RF circuit part of the transmitter and receiver, and was terminated in the form of a waveguide for RF signal impedance matching in the form of a transition from the microstrip line to the waveguide. The 30° beam width of the receiver maximum gain of 19 dBi and the 29° beam width of the transmitter maximum gain of 18 dBi are shown. Through this antenna configuration, the system was configured to suit the low-orbit satellite transmission/reception characteristics.

Development of a Vertical polarized Leaky-wave Waveguide Slot Array Antenna for Receiving the Ku-band Direct Broadcasting Satellite Signals

  • Lim, Gye-Jae
    • Journal of Satellite, Information and Communications
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    • v.2 no.2
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    • pp.10-15
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    • 2007
  • Small size and low profile antenna for mobile vehicular-top-mounted is needed in satellite communication services such as DBS, Satellite Internet and VSAT. In middle latitudes, the development of an array antenna which has the conformal, low profile and 45 degree beam tilted configuration, and has the high gain with sharp beamwidth, low sidelobe and low loss is required for Ku-band satellite communication. In this paper, in order to meet with these performances, an array antenna consisting of the vertical polarized waveguide longitudinal slots based on the leaky-wave mode of traveling wave antenna is proposed. An array antenna consisting of 16 leaky-wave elements is showing 30 dBi of gain, 4.9 degree of beamwidth, below than -20 dB of sidelobe level, 45 degree of beam tilt angle in center frequency. Feed network designed by waveguide cooperated feed shows good performance of wideband and low loss.

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Design of a Waveguide Broad-wall Longitudinal Slot Array Antenna of X-type Monopulse Axes (X-형 모노펄스 축구조를 가지는 도파관 광벽 종방향 슬롯 배열 안테나의 설계)

  • 나형기;박창현
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.2
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    • pp.208-216
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    • 2002
  • In this paper, the design method of a waveguide broad-wall longitudinal slot array monopulse antenna of X-type monopulse axes is presented, and the method is verified through manufacture and measurement. In the antenna design of this paper, the antenna size is small and the monopulse axes are X-type. Thus, the common continuous aperture distribution fuction is not suitable and the power balance among antenna quadrants should be considered. Also, since the waveguide height is reduced into 0.1 wavelength, the modelling of the slot characteristics is not simple. Thus, in this paper, the aperture distribution is optimized by using random number, and the balance among the quadrants is achieved by applying the quadrant weighting factor during the aperture optimization process. Also, the moment method procedure is accelerated by applying the interpolation technique to some part of the moment matrix, and the moment method procedure is added to the array synthesis program as a subroutine so that the slot characteristics can be calculated directly when it is required. Based on this method, a antenna of 28dBi is designed and manufactured. It is found that the antenna characteristics is similar to design data.

Design of a CPW (Coplanar Waveguide) fed dual-band slot antenna (CPW 급전 이중대역 슬랏 안테나 설계)

  • 김봉준;오경진;최재훈
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2002.11a
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    • pp.215-218
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    • 2002
  • In this paper, a dual-frequency printed slot antenna loaded with an open-ring conducting strip and capacitively fed by a coplanar waveguide(CPW) is designed. The designed antenna has a bandwidth of 240㎒(1690㎒-1930㎒) at PCS frequency band and of 160㎒(2380㎒-2540㎒) at WLAN frequency band. In both frequency ranges, pattern and gain requirements are satisfied. The commercial software, IE3D, was used to design slot antenna. The predicted characteristics along with measured data are presented for verification purpose.

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Approximate analysis of rectangular microstrip patch antenna located in a rectangular waveguide (직사각형 도파관내에 놓여 있는 사각형 마이크로스트립 패치 안테나의 근사적 해석)

  • 박동국;이대성;황학인
    • Journal of the Korean Institute of Telematics and Electronics D
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    • v.34D no.12
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    • pp.8-13
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    • 1997
  • In this paper, the input impedance and efficiency of rectangulr microstip patch antenna located inside a rectangular wavegudie is calculated by using the cavity model and the mode excited by te patch antenna which is modeled as an equivanlent surface magnetic current on the conducting plate. Measured return losses of a rectangular microstrip patch antenna tuned at 5.93 GHz in the free space and inside the retangular waveguide are compared and found to be in good agreement with calculated results.

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A Novel Broadband Horn Antenna with Quadruple-Ridged Waveguide and Dielectric Lens (4중 릿지 도파관과 렌즈를 이용한 새로운 광대역 혼 안테나)

  • Lee, Kee-Oh;Park, Dong-Chul
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.6
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    • pp.135-141
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    • 2008
  • In this paper, a design method of broadband horn antenna having 3:1 bandwidth and multiple polarization characteristics is proposed. The feeding section of the antenna adopts quadruple-ridged waveguide type for broadband and multiple polarization characteristics of the antenna. By inserting a shorting bar in the cavity structure with a semi-sphere type back short, the return loss at the feeding section was minimized. A corrugated dielectric lens is designed for phase compensation and lens-surface matching at the antenna aperture, which improves the antenna beam pattern. The validity of the design method is verified by indicating the measured data of the antenna.

Slotted array in-motion antenna for receiving both RHCP and LHCP using a single layer film (좌선회, 우선회 원편파 모두 수신 가능한 차량용 도파관 슬롯 배열 안테나)

  • Son, Kwang-Seop;Park, Chan-Gu
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.46 no.2
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    • pp.126-133
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    • 2009
  • In this paper, The planar waveguide slotted antenna is presented for a satellite communication of vehicles. In stead of the microstrip patch array antenna having a dielectric loss and a feeding loss, the proposed antenna has the 3-layered waveguide feeding network structure for assembling easily. Also this antenna can receive mechanically both RHCP and LHCP transmitted from a satellite using a polarizer made from a thin single layer film. The Gain of the proposed 4X8 array antenna is 27.5dB and the gain of 8X16 array antenna is 32dB.