Study on Direction Detection in a Microwave Power Transmission …wpt/paper/WPT2013-37.pdf · 2017....
Transcript of Study on Direction Detection in a Microwave Power Transmission …wpt/paper/WPT2013-37.pdf · 2017....
-
THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS
IEICE Technical Report
1 1 1 2 2
2 2
1 611–0011
2
E-mail: 1{masashi iwashimizu,mitani,shino}@rish.kyoto-u.ac.jp2{[email protected]}
2 2
, , , 2
Study on Direction Detection in a Microwave Power Transmission System
for a Mars Observation Airplane
Masashi IWASHIMIZU1, Tomohiko MITANI1, Naoki SHINOHARA1, Gaku SASAKI2, Kei
HIRAOKA2, Koyo MATSUZAKI2, and Koichi YONEMOTO2
1 Research Institute for Sustainable Humanosphere, Kyoto University Gokasho, Uji, Kyoto, 611–0011
2 Graduate school of Engineering, Kyushu Institute of Technology
E-mail: 1{masashi iwashimizu,mitani,shino}@rish.kyoto-u.ac.jp2{[email protected]}
Abstract In order to attain the weight saving of a Mars observation airplane, we are planning to supply energy
by microwave. This paper presents the direction detection of the airplane. An array antenna on the ground receives
a pilot signal from the airplane, and detects the direction of the airplane by phase differences of antenna elements.
For weight saving, we utilize the second harmonics radiated from rectennas on the airplane as a pilot signal.
Key words Mars Observation Airplane, Direction Detection, Direction of Arrival Estimation, Second Harmonics
1.
0.75
1
2
15
mitan_000WPT2013-37(2014-03)
mitan_000This article is a technical report without peer review, and its polished and/or extended version may be published elsewhere.
-
THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS
IEICE Technical Report
2.
2. 1
2.445GHz 900W
+15.5 dBi
3
11 deg.
2. 2
1 [1]
2
3
4
(i)
(ii) δ (i) (iii)
ζ θ ϕ (1) (2)
θ = sin−1
⎛
⎝ δ
π
√1−
(ζπ
)2
⎞
⎠ (1)
ϕ = sin−1(ζπ
)(2)
|δ|
-
THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS
IEICE Technical Report
2. 4 2
2
4.89GHz
2 6 7
3m
1.5m
2.445GHz 900W
x-y -30 deg.
30 deg.
4.89GHz
8
-35 dBm -60 dBm 2
2
3.
3. 1
2.445GHz 900W 4.89GHz
6 2
7 2
6
4.89GHz -75 dBm
4.89GHz
-30 dBm -70 dBm x-y
-30 deg.
30 deg.
9
-60 dBm
-60 dBm
3. 2
8 2
9
-
THE INSTITUTE OF ELECTRONICS,INFORMATION AND COMMUNICATION ENGINEERS
IEICE Technical Report
6 7
AGC AGC
10
AGC
3. 3
11 1
θ1 θ2
3m
λ/2
θ1 θ2
δ (3)
δ = πsinθ1 (3)
12 2
λ 1 0.9
13 13
f(θ) δ (4)
δ = f(θ2)− f(θ1) + πsinθ1 (4)
13
f(θ2)−f(θ1)θ1 30 deg. θ2 30.4 deg. f(θ2)−f(θ1)
18.7 deg. 7.1 deg.
2
15
f(θ)
10
10 AGC
4.
[1] A. Nagahama, T. Mitani, N. Shinohara, K. Fukuda, K. Hi-
raoka, and K. Yonemoto “Auto Tracking and Power Con-
trol Experiments of a Magnetron-based Phased Array Power
Transmitting System for a Mars Observation Airplane”,
IEEE MTT-S IMWS-IWPT 2012, Kyoto, Japan, May 10-
11.
11
12
13