Transcription of 4群（通信工学）－2編（アンテナ・伝搬） 6章 開口面アンテナ
1 4 2 6 4 2 6 2013 1/(16) 4 2 6 4 - 2 - 6 6-1 [2010 5 ] Aperture Aperture Antenna 6 1 Lens Antenna 6 1 1) 2013 2/(16) 4 2 6 4 - 2 - 6 6-2 [2010 5 ] 6-2-1 Horn Antenna Electromagnetic Horn 6 2 Primary Radiator 2), 3) 6 1 4) 6 2 1) 6 1 1) 6-2-2 Pyramidal Horn Antenna 6 3 TE01 6 3 1) 2013 3/(16) 4 2 6 G heabG ++=2104log10 dB (6 1) e h Aperture Efficiency 6 4 6 4 1) Horn l H 3/8 E 1/4 hla3= elb3= Gopt += abG dB (6 2) 6 5 1) 2013 4/(16)
2 4 2 6 6 5 6-2-3 Conical Horn Antenna 6 6 TE11 6 6 1) G cdG +=210log10 dB (6 3) c 6 7 d 3/8 ld3= c dB TE11 H E H 45 6 7 1) 6-2-4 TE11 TM11 E H Dual-mode Conical Horn Antenna Potter)5) 2013 5/(16) 4 2 6 6) 7) (Flare Iris Horn) 8) 9) 6 8(a) (b) TE11 TM11 % 20 % 10) 6 8 1) 6-2-5 Corrugated Horn 6 9(a) Corrugated Conical Horn Antenna 11), 12) 1 EH11 6 9(b) 1/4 EH11 13)
3 6 9 1) 2013 6/(16) 4 2 6 4 - 2 - 6 6-3 [2010 5 ] 6-3-1 reflector Antenna 1 6 2 6 2 1) 6-3-2 (1) Parabola Antenna Parabolic Antenna, Paraboloidal reflector Antenna Paraboloidal reflector 6 10 Pencil Beam 2013 7/(16) 4 2 6 2013 8/(16) 6 10 1) 6 10 fyxz422+= (6 3) cos1+ (6 4) f Focal Length OF Focal Point 2=fr Aperture Angle 2 a fD f by D / 24cot1aDf = Spillover G (6 5) 120 180 f/D = (2)
4 2 =DG (6 6) 50 60 % 10 14 dB 4 2 6 2013 9/(16) 6-3-3 Blocking 6 11 Offset Parabolic Antenna 6 11 1) Phase Center 6-3-4 (1) 2 Dual reflector Antenna 6 12 Cassegrain Antenna 6 13 Gregorian Antenna 1 2 reflector Shaping(Shaped reflector ) Ds D 4 2 6 2013 10/(16) 6 12 1) 6 13 1)
5 VSAT 6-3-5 Offset Dual reflector Antenna 2 14), 15) 4 2 6 4 - 2 - 6 6-4 [2010 5 ] 6-4-1 (Surface Accuracy) (1) xrbsi = (6 7) i s b r x Polarization Efficiency 6 14 16) 2013 11/(16) 4 2 6 (6 7) i s 6 14 Ef ( ) = Eo cos q ( /2) i s I s I s q 11 dB i s 90 % I s 81 % 16) (6 7)
6 X (6 8) rbsmssi = ss sm i sm b 6 15 Ds/Dm 17) 6 15 17) i s x (2) 6 16 18) 2013 12/(16) 4 2 6 6 16 18) Offset reflector Antenna 6-4-2 Shaped Beam (Contoured Beam) 2013 13/(16) 4 2 6 (1) (a) (b)
7 Wave Front CS CS-2 Horn reflector Antenna 19), 20) 4/6/20/30 GHz GHz 6 17 6 17 CS-2 GHz 21) (c) 22) 2013 14/(16) 4 2 6 23) (2) 1978 BSE 1984 BS-2 24) BS-3 Elliptical Corrugated Horn 25) 1) ( ), ( 2 ), , 2008.
8 2) A. D. 0lver, P. J. B. Clarricoats, A. A. Kishk, and L. Shatai, Microwave horns and feeds, IEEE Press, New York, 1994. 3) T. Kitsuregawa, Satellite Communication antennas, Artsch House, Boston, London, 1990. 4) , , ( ), , 1985. 5) P. D. Potter, A new horn antenna with suppressed sidelobes and equal beam widths, Microwave J., , , , Jun. 1963. 6) , , (B), , , , Aug. 1971. 7) S. B. Cohn, Flare angle changes in a horn as a means of pattern control, Microwave J., , , , Oct. 1970. 8) , , , , (B), , , , Dec. 1979. 9) , , , , , , , (B), , , , Nov. 2002. 10) , , (B), , , , Oct.
9 1974. 11) A. F. Kay, The scalar feed, TRG Science Report 5, AFCRL Project 4600, Contract 19(604)-8057, Mar. 1964. 12) P. I. B. Clarricoats and P. K. Saba, Propagation and radiation behaviour of corrugated feeds, Part 2-corrugated-conicalhorn feed, Proc. IEE, , , , Sep. 1971. 13) , , , , (B), , , , Jan. 1973. 14) , , , (B), , , , Dec. 1975. 15) , , , (B), , , 2013 15/(16) 4 2 6 2013 16/(16) , Feb. 1975. 16) , , 9 , , Jul. 2003. 17) , , (B).
