• Title/Summary/Keyword: Planar Subarray

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Dice-Five Polarization-Agile Corner-Fed Patch Array Antenna

  • Vallecchi, Andrea
    • ETRI Journal
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    • v.27 no.3
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    • pp.250-256
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    • 2005
  • A novel planar polarization-agile microstrip subarray is proposed and its performance assessed by a thorough numerical investigation. The subarray consists of five square patches with a central element, directly coupled to a pair of microstrip feed lines by a cross-shaped aperture, which spreads the power outwards to the other patches through a network of suitable connections. By properly exciting the antenna at its input ports, any kind of polarization of the radiated field can be accomplished with fairly low cross-polarization levels. Moreover, since only two feed lines are required to drive the whole subarray, polarization agility is simply and attractively achieved by a single phase-shift circuit. The design concept is described and the results of the analyses and simulations performed by two completely independent full-wave approaches are presented and discussed.

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Implementation and Performance Analysis of the Adaptive Beamformer with Subarray Architecture (부배열 합성을 이용한 적응적 빔형성기의 구현 및 성능 분석)

  • Jang, Youn-Hui;Hong, Dong-Hee;Choi, Seong-Hee
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.24 no.4
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    • pp.448-458
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    • 2013
  • In this paper, we present the performance and the experimental results of the adaptive beamformer in the radar system with the planar active array. The study of the adaptive beamformer has already been performed in several literatures, but it is difficult to find the results or examples those are implemented in the actual radar system. Here we employ the adaptive beamformer to the practical radar system with subarray architecture. The performance of beamformer will be demonstrated by modeling and simulation and finally the far-field experimental results.

The Low Sidelobe Array Antenna Design of Mobile Antenna System for Satellite Multimedia Communications (위성 양방향 통신용 이동 안테나 시스템의 저부엽 특성 배열 안테나 설계)

  • Park Ung Hee;Son Seong Ho;Noh Haeng Sook;Jeon Soon Ik
    • Journal of the Institute of Electronics Engineers of Korea TC
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    • v.42 no.1
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    • pp.91-97
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    • 2005
  • In the mobile antenna systems for satellite multimedia communications, the active way antenna having a low sidelobe antenna pattern is described in this paper. This designed and fabricated array antenna is satisfied with international beam pattern regulation on moving states. The subarray of the proposed mobile antenna system is arranged with a stair-planar structure and non-periodic array spacing. This subarray is designed with three-layered microstrip patch as both receiving and transmitting radiator of which are improved with antenna gain and bandwidth. Also, the optimum subarray spacing is designed to make the lowest sidelobe pattern by genetic algorithm. In addition, the characteristics of a GA-perturbed array are investigated from simulated and measured beam pattern results.

Design of Interleaved Thinned Planar Arrays Using Cyclic Difference Set (Cyclic Difference Set을 이용한 Interleaved Thinned 평면 배열 설계)

  • Kwon, Gina;Hwang, Keum Cheol;Park, Joon-Young;Kim, Seon-Joo;Kim, Dong-Hwan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.23 no.12
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    • pp.1351-1358
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    • 2012
  • In this paper, an analytical technique is proposed for the design of interleaved thinned planar array with well-behaved and predictable sidelobes. The interleaved arrays are composed of thinned planar subarrays based on cyclic difference sets(DSs). Becauce sidelobes of thinned planar subarrays based on DS are predictable by DS parameters, the subarrays exhibit very similar sidelobe levels by utilizing DS and complementary DS with similar autocorrelations each other. The combinatorial method also allows the design of interleaved placements with simultaneously optimum peak sidelobe levels(PSLs) of subarrays using cyclic shift-a property of DSs. The optimized PSLs of the interleaved array are -12.47 dB and -10.34 dB.