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1
2
3 ( ) (mm) (GHz)=300( ) GHz=1 10mm ( 2GHz2Mbps) Gbps= Mbps ( m),?
4 S G=P/Pi30dB=1000 Gm=4πS/λ 2, S= 80λ 2 Gm=30dB η=g/gm, S= 80λ 2,G=27dB η=50%
5 (GHz) (dbi) (Larger Size)
6
7 Transmission loss (db/cm) db/cm?? radiation dielectric conductor 0.8 mm 1.6 mm db/cm db/cm Microstrip line Post-wall WG Hollow WG : 7 σ = S/m : : ε r = 9.4 tan δ = : PTFE ε r = 2.17 tan δ = GHz 2 Flexibility 0.18 mm 5.5 mm mm 0.2 mm Z = 3.2 mm 0 50 Ω mm Std. WG (WR42) 0.17 db/cm 1 1 High TEM db/cm 1 3 Low TE db/cm 5 50 Low TE 10 1 R.A. Pucel, D.J. Masse, C.P. Hartwig, "Losses in microstrip," IEEE Trans. on Microwave Theory and Techniques, vol. 16, No. 6, pp , June Relative value based on microstrip line
8 Slot plate λ g π-junction Groove feed structure 0.5λ g T-junction
9 Frequency [GHz] Antenna Efficiency [%] % B H 61% H65% Antenna efficiency [%] H 37% D D D D E DE 64% 50% 49% 43% 58% 45% 50% (Taylor) 54% 64% B J B J E 43.3% 34.3% 55% 20.4% H H 55% Gain [dbi] 35dBi (Choke+No contact) 60% O O 65% B E 75.6% 47% 80 E Waveguide 70 O E E 60 E 50 E B 40 Taylor D 30 Microstrip & Triplate Frequency [GHz] H 50% B E Waveguide } O Waveguide RLSA J RLSA D 50% Post-wall WG B H Microstrip B Triplate GHz D J D D B Microstrip & Triplate Waveguide E J E Taylor E D D Gain [dbi]
10 Parallel Plate Waveguide Window Post Post Reflection Canceling Slot Pair T Junction Feed Waveguide Coupling Window Input Aperture 60GHz 1.2mm(0.35λ, εr=2.17, PTFE) () (0.5mm1.0mm ) PCB ()
11 E-plane H-plane Angle(deg) 76.5GHz TEM = 52mm 49mm 4dB = 12dB
12 E-plane H-plane Angle(deg) E H 8dB : 18dB (: 22dB)
13 Post Reflection Canceling Slot Trio Parallel Plate Waveguide T Junction Feed Waveguide 45 Window Post Coupling Window Input Aperture 1+2 ( ) ( 28dB) Angle(deg)
14 - 60GHz MSL RF RF Post-wall planar antenna 75 mm 32 mm Thickness of the antenna substrate : 1.2 mm MSL to to Upper side Backside MMIC Package VGG IF VDD Connector (for DC and IF) (cm) (7.0 GHz (11.7%))
15 s s d h Inner Conductor (a) LTCC substrate h Post-Wall Waveguide Short Wall s q p (b) PTFE substrate s h θ d q Reflection Canceling Posts p a LTCC b c d (c) PTFE substrate (d) PTFE substrate
16 PTFE LTCC Reflection[dB] (a) (d) (a) (e) (b) (b) (c) Frequency[GHz] (c) Reflection[dB] (c) (d) (e) (a) (e) (b) (d) Frequency[GHz]
![0 [%] 15 [%] 12.](/docs-images/98/136737210/images/17-2.jpg "8 [%] 15 [%] -- 1.")
17 -15dB 0.1 mm 0.8 mm 0.6 mm (PTFE) (PTFE) (PTFE) (PTFE) (LTCC) 15 [%] 2.0 [%] 15 [%] 12.8 [%] 15 [%] [%] 14.7 [%] 13.2 [%] 11.3 [%]
![Reflection [db] 0-5 -10-15 58 59 60 61 62 Frequency [GHz] 28](/docs-images/98/136737210/images/18-0.jpg "26 24 22 20 18 Gain [dbi] 27.3dBi 58.2% -12.")
18 Reflection [db] Frequency [GHz] Gain [dbi] 27.3dBi 58.2% -12.2dB (6%) 46mm 40mm
19 (2 ) (10-4 ) (100m 1t!),(10µm) ( / >5) (??) 20g, /
20 (RLSA) Slot Pair (80% 12GHz ) 12GHz Tokyo Institute of Technology
21 60GHz RLSA () Slot Plate Dielectric Copper foil Dielectric Coaxial feeder Bottom Plate ε r (=1.20) Bottom Plate Coaxial feeder ε r (=2.20) Tokyo Institute of Technology
![60GHz RLSA Gain [dbi] 36 34 32 30 28 26 24 80% 70% 60% 50% 80%](/docs-images/98/136737210/images/22-0.jpg "70% 60% 50% measured cal.")
![22 58 59 60 61 62 Frequency [GHz] A B- C- A- (, 100 mmφ) : 33.](/docs-images/98/136737210/images/22-1.jpg "0dBi, : 50% B- (, 50 mmφ) : 27.3dBi, : 54% C- (, 100 mmφ) : 33.")
22 60GHz RLSA Gain [dbi] % 70% 60% 50% 80% 70% 60% 50% measured cal Frequency [GHz] A B- C- A- (, 100 mmφ) : 33.0dBi, : 50% B- (, 50 mmφ) : 27.3dBi, : 54% C- (, 100 mmφ) : 33.4dBi, : 55% Tokyo Institute of Technology
23 2 RLSA Aperture Efficiency (%) ε r1 = Dielectric Constant ε r 2 ε r2 =1.08 ε r <1.2,ε r >2 Tokyo Institute of Technology
24
25 RF RF RF Ethernet(24V ) : 2kg
26 +
![50 100 150 X [mm] 0-1](/docs-images/98/136737210/images/27-1.jpg "-2-3 -4-5 -6-7 -8-9")
27 X [mm]
28 Bonding Screw Screw+Choke 80% Cal. 70% 60% 50% 40% Normalized Frequency
29 a (er=9.8) GHz 1mm15 d Tokyo Institute of Technology
30 8 ( :#3 ) : -9 db : db 0 db (Ansoft HFSS) (db)
31 mm mm 17.1
32 #4 #8 #2 #6 #1 #5 #3 #7 Gain (dbi) Angle (deg)
33 Back side Top side Input ports 120 mm waveguide feeder 4-way Butler matrix Slot array (58.8 mm) (145.7 mm) 270 mm 1
34 +?
35 () RF
3 16 2 27 4497 LAN(Local Area Network) OFDM(Orthogonal Frequency Division Multiplexing) 12 3 3 12 3 12 33. F/B 22.7dB 3 F/B i 1 1 2 3 8 2.1................................. 8 2.2.............................
Doctor Thesis Template
A Study of Variable Beam-tilted Microstrip Array Antenna LAN(Local Area Network) LAN PC LAN LAN LAN 5.2GHz 20 25Mbps OFDM(Orthogonal Frequency Division Multiplexing) 2 2 90 2 60 30 45 60 1....2 1.1....
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, Circularly Polarized Patch Antennas Combining Different Shaped Linealy Polarized Elements Takanori NORO,, Yasuhiro KAZAMA, Masaharu TAKAHASHI, and Koichi ITO 1. GPS LAN 10% [1] Graduate School of Science
64 3 g=9.85 m/s 2 g=9.791 m/s 2 36, km ( ) 1 () 2 () m/s : : a) b) kg/m kg/m k
63 3 Section 3.1 g 3.1 3.1: : 64 3 g=9.85 m/s 2 g=9.791 m/s 2 36, km ( ) 1 () 2 () 3 9.8 m/s 2 3.2 3.2: : a) b) 5 15 4 1 1. 1 3 14. 1 3 kg/m 3 2 3.3 1 3 5.8 1 3 kg/m 3 3 2.65 1 3 kg/m 3 4 6 m 3.1. 65 5
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8 ( ) 2014 11 23 OP h g m r d 4 ( ) 4.2 + (lumped constant circuit) 4.2.1 3 (Poynting ) (strip line) (waveguide) (coaxial cable) GHz 4.4(a) dj dx dv Zdx Ydx ( ) (distributed constatn circuit) *1 4.4(c)
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, 2012 10 SCOPE, 2012 10 2 CDMA OFDMA OFDM SCOPE, 2012 10 OFDM 0-20 Relative Optical Power [db] -40-60 10 Gbps NRZ BPSK-SSB 36dB -80-20 -10 0 10 20 Relative Frequency [GHz] SSB SSB OFDM SSB SSB OFDM OFDM
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y y y Field Analysis in a Lossy Dielectric Sandwiched between Flanged Rectangular Waveguide and Conducting Plane Makoto HIRANO y, Masaharu TAKAHASHI y, and Minoru ABE y. ( ) [] [],[3] y Department of Electronics
1 I 1.1 ± e = = - = C C MKSA [m], [Kg] [s] [A] 1C 1A 1 MKSA 1C 1C +q q +q q 1
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1 Coil D-shaped electrodes ( [1] ) Vacuum chamber Ion source Oscillator 1.1 m e v B F = evb (1) r m v2 = evb r v = erb (2) m r T = 2πr v = 2πm (3) eb v
(Compton Scattering) Beaming 1 exp [i (k x ωt)] k λ k = 2π/λ ω = 2πν k = ω/c k x ωt ( ω ) k α c, k k x ωt η αβ k α x β diag( + ++) x β = (ct, x) O O x
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264 72 5 216 pp. 264 272 * 43.3. k, Yj; 43.38.Hz 1. 2. 2.1 1 4.8 1 2 [kg m 2 s 1 ] 1.2 1 3 [g/cm 3 ] 34 [m/s] 1.48 1 6 [kg m 2 s 1 ] 1 [g/cm 3 ] 1,48 [m/s] 1, 1 4 1 2,5 1 Tutorial on the underwater or
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FDTD S A Study on FDTD Analysis based on S-Parameter 18 2 7 04GD168 FDTD FDTD S S FDTD S S S S FDTD FDTD i 1 1 1.1 FDTD.................................... 1 1.2 FDTD..................... 3 2 S 5 2.1 FDTD
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医系の統計入門第 2 版 サンプルページ この本の定価 判型などは, 以下の URL からご覧いただけます. このサンプルページの内容は, 第 2 版 1 刷発行時のものです.
医系の統計入門第 2 版 サンプルページ この本の定価 判型などは, 以下の URL からご覧いただけます. http://www.morikita.co.jp/books/mid/009192 このサンプルページの内容は, 第 2 版 1 刷発行時のものです. i 2 t 1. 2. 3 2 3. 6 4. 7 5. n 2 ν 6. 2 7. 2003 ii 2 2013 10 iii 1987
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5-3 Photonic Antennas and its Application to Radio-over-Fiber Wireless Communication Systems LI Keren, MATSUI Toshiaki, and IZUTSU Masayuki In this paper, we presented our recent works on development of
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