마이크로스트립 리플렉트어레이 안테나에 관한 연구

국문 초록 (Abstract)

마이크로스트립 리플렉트어레이는 다수의 반사소자를 이용하여 방사패턴을 조절하는 안테나로서, 일반적으로 곡면형 반사판 안테나를 대체하기 위하여 연구되어왔다. 본 논문에서는 리플렉트어레이에 관한 간략한 설계 이론을 정리하고, 고이득 및 광대역 리플렉트어레이의 연구동향을 살펴본다. 리플렉트어레이의 이득 특성을 개선하기 위해서는 리플렉트어레이에서 구현되는 반사위상의 오차를 최소화해야 하는데, 이를 위해서는 충분히 넓은 반사위상 범위 및 낮은 반사위상 민감도를 얻어야 한다. 리플렉트어레이의 대역폭을 확장하기 위해서는 반사소자의 반사위상이 주파수에 대해 선형적인 특성을 가지도록 설계해야 한다. 본 논문에서는 적층형 구조, 단층 다중공진 구조 등, 고이득 및 광대역 리플렉트어레이를 위해 반사소자의 반사위상 특성을 개선하고자 하는 다양한 연구에 대해 살펴본다. 또한, 안테나를 보다 소형화하기 위해 리플렉트어레이를 이중 반사판 형태로 구현하는 연구를 소개하고, 마지막으로 Contoured 빔, 근거리 빔 집중, RCS 감소 등 다양한 리플렉트어레이 적용 사례에 대해 정리한다.

다국어 초록 (Multilingual Abstract)

Microstrip reflectarray is an antenna which controls its radiation pattern with a number of reflective elements. Conventionally, the reflectarray has been researched to replace curved reflector antennas. In this paper, design theories of reflectarray is briefly introduced, and research trends of high gain and broadband reflectarrays are reviewed. To improve the gain of the reflectarrays, it is required that the reflection phase errors on the reflectarray surface be minimized. For this purpose, sufficiently wide reflection phase range and low phase sensitivity should be realized with the designed element. For bandwidth improvement, the reflection phase of the element should be linear with the frequency variation. In this paper, various researches to improve the reflection phase characteristics of the element for high gain and broadband reflectarrays, such as multi-layer and single-layer multi-resonant structures, are reviewed. Also, dual-reflectarray configuration for compact antenna design is reviewed. Finally, various applications of reflectarrays such as contoured beam, near-field focusing, and RCS reduction are reviewed.

목차 (Table of Contents)

• 요약
• Abstract
• Ⅰ. 서론
• Ⅱ. 리플렉트어레이 안테나 설계 이론
• Ⅲ. 고이득 안테나를 위한 리플렉트어레이 연구
• Ⅳ. 광대역 안테나를 위한 리플렉트어레이 연구
• Ⅴ. 소형화를 위한 리플렉트어레이 연구
• Ⅵ. 리플렉트어레이 응용 사례
• Ⅶ. 결론
• References

참고문헌 (Reference)

1 김우중, "패턴 합성을 통한 단일 곡면 구조에서의 RCS 감소 기술에 관한 연구" 한국전자파학회 24 (24): 366-373, 2013

2 D. M. Pozar, "Wideband reflectarrays using artificial impedance surfaces" 43 (43): 148-149, 2007

3 J. H. Yoon, "W-band reflectarray antenna for improvement of radiation characteristics" 2014

4 J. H. Yoon, "W-band microstrip reflectarray with double-cross element for bandwidth improvement" 2015

5 M. Paquay, "Thin AMC structure for radar cross-section reduction" 55 (55): 3630-3638, 2007

6 M. Zhou, "The generalized direct optimization technique for printed reflectarrays" 62 (62): 1690-1700, 2014

7 H. Y. Yang, "The RCS of a microstrip patch on an arbitrarily biased ferrite substrate" 49 (49): 1610-1614, 1993

8 M. A. Milon, "Surrounded-element approach for the simulation of reflectarray radiating cells" 1 (1): 289-293, 2007

9 J. H. Yoon, "Square ring element reflectarrays with improved radiation characteristics by reducing reflection phase sensitivity" 63 (63): 814-818, 2015

10 R. E. Hani, "Specular reflection analysis for off-specular reflectarray antennas" 61 (61): 3575-3581, 2013

11 J. H. Yoon, "Single-layer reflectarray with combination of element types" 50 (50): 574-576, 2014

12 H. C. Strifors, "Scattering of electromagnetic pulses by simple-shaped targets with radar cross section modified by a dielectric coating" 46 (46): 1252-1262, 1998

13 J. H. Yoon, "Researches on radiation performance improvement of microstrip reflectarray antennas" 2013

14 N. Misran, "Reflection phase response of microstrip stacked ring elements" 38 (38): 356-357, 2002

15 J. H. Yoon, "Reflectarray with EBG elements for improved radiation characteristics" 49 (49): 975-976, 2013

16 J. Huang, "Reflectarray Antennas" Wiley-IEEE 2008

17 T. Wu, "Radar cross section of arbitrarily shaped bodies of revolution" 77 (77): 735-740, 1989

18 M. Bozzi, "Performance comparison of different element shapes used in printed reflectarrays" 2 : 219-222, 2003

19 H. Rajagopalan, "On the reflection characteristics of a reflectarray element with low-loss and high-loss substrates" 52 (52): 73-89, 2010

20 Q. Y. Chen, "Low-profile wideband reflectarray by novel elements with linear phase response" 11 : 1545-1547, 2012

21 M. E. Bialkowski, "Investigations into phase characteristics of a single-layer reflectarray employing patch or ring elements of variable size" 56 (56): 3366-3372, 2008

22 E. Almajali, "Feed image lobes in offset-fed reflectarrays:diagnosis and solution" 62 (62): 216-227, 2014

23 임요한, "Electromagnetic Gradient Surface의 입사각과 편파에 따른 RCS 특성 분석" 한국전자파학회 22 (22): 840-846, 2011

24 M. Zhou, "Direct optimization of printed reflectarrays for contoured beam satellite antenna applications" 61 (61): 1995-2004, 2013

25 J. A. Encinar, "Design of two-layer printed reflectarrays using patches of variable size" 49 : 1403-1410, 2001

26 H. -T. Chou, "Design of a near-field focused reflectarray antenna for 2.4 GHz RFID reader applications" 59 (59): 1013-1018, 2011

27 B. Ma, "Design of a K‐band reflectarray antenna using double square ring elements" 54 (54): 394-398, 2012

28 M. Zhou, "Design and optimization of a single-layer planar transmit-receive contoured beam reflectarray with enhanced performance" 63 (63): 1247-1254, 2015

29 R. Florencio, "Broadband reflectarrays made of cells with three coplanar parallel dipoles" 56 (56): 748-753, 2014

30 M. R. Chaharmir, "Broadband reflectarray with combination of cross and rectangle loop elements" 44 (44): 658-659, 2008

31 P. Nayeri, "Broadband reflectarray antennas using double-layer subwavelength patch elements" 9 : 1139-1142, 2010

32 J. H. Yoon, "Broadband microstrip reflectarray with five parallel dipole elements" 14 : 1109-1112, 2015

33 J. A. Encinar, "Broadband design of threelayer printed reflectarrays" 51 : 1662-1664, 2003

34 M. R. Chaharmir, "Broadband design of a single layer large reflectarray using multi cross loop elements" 57 (57): 3363-3366, 2009

35 P. Nayeri, "Bandwidth improvement of reflectarray antennas using closely spaced elements" 18 : 19-29, 2011

36 J. H. Yoon, "Axially symmetric dual-reflectarray antennas" 50 (50): 908-910, 2014

37 C. A. Balanis, "Antenna Theory: Analysis and Design" Wiley 2005

38 M. Zhou, "An accurate technique for calculation of radiation from printed reflectarrays" 10 : 1081-1084, 2011

39 Q. Y. Chen, "An X-band reflectarray with novel elements and enhanced bandwidth" 12 : 317-320, 2013

40 J. A. Encinar, "A transmit-receive reflectarray antenna for direct broadcast satellite applications" 59 (59): 3255-3264, 2011

41 D. M. Pozar, "A shaped-beam microstrip patch reflectarray" 47 (47): 1167-1173, 1999

42 Q. Y. Li, "A novel microstrip rectangular patch/ring combination reflectarray element and its application" 8 : 1119-1122, 2009

43 A. Vosoogh, "A high-efficiency Ku-band reflectarray antenna using single-layer multiresonance elements" 13 : 891-894, 2014

44 A. Buffi, "A focused planar microstrip array for 2.4 GHz RFID readers" 58 (58): 1536-1544, 2010