Performance Evaluation of Built-In Small LF Antennas inside a Metal Case
Summary :
This paper describes a method for evaluating the performance of a small magnetic core loop antenna used for radio controlled watches. Recently, amorphous metal core loop antennas are used as built-in small antennas inside a metal case. It is difficult to perform electromagnetic simulation for amorphous core loop antennas because of the complicated laminate structure. Therefore, we modeled the amorphous metal core loop antenna as an equivalent bulk structure having anisotropic permeability property that we can simulate. We analyzed the receiving sensitivity of the amorphous antenna by calculating the antenna factor. The receiving sensitivity degrades remarkably when an antenna is inside a metal case. We performed further simulation to investigate eddy current losses that cause deterioration.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E90-C No.9 pp.1784-1792
- Publication Date
- 2007/09/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1093/ietele/e90-c.9.1784
- Type of Manuscript
- Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
- Category
- Antennas/Systems
Authors
Keyword
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Kazuaki ABE, Jun-ichi TAKADA, "Performance Evaluation of Built-In Small LF Antennas inside a Metal Case" in IEICE TRANSACTIONS on Electronics,
vol. E90-C, no. 9, pp. 1784-1792, September 2007, doi: 10.1093/ietele/e90-c.9.1784.
Abstract: This paper describes a method for evaluating the performance of a small magnetic core loop antenna used for radio controlled watches. Recently, amorphous metal core loop antennas are used as built-in small antennas inside a metal case. It is difficult to perform electromagnetic simulation for amorphous core loop antennas because of the complicated laminate structure. Therefore, we modeled the amorphous metal core loop antenna as an equivalent bulk structure having anisotropic permeability property that we can simulate. We analyzed the receiving sensitivity of the amorphous antenna by calculating the antenna factor. The receiving sensitivity degrades remarkably when an antenna is inside a metal case. We performed further simulation to investigate eddy current losses that cause deterioration.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.9.1784/_p
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@ARTICLE{e90-c_9_1784,
author={Kazuaki ABE, Jun-ichi TAKADA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Performance Evaluation of Built-In Small LF Antennas inside a Metal Case},
year={2007},
volume={E90-C},
number={9},
pages={1784-1792},
abstract={This paper describes a method for evaluating the performance of a small magnetic core loop antenna used for radio controlled watches. Recently, amorphous metal core loop antennas are used as built-in small antennas inside a metal case. It is difficult to perform electromagnetic simulation for amorphous core loop antennas because of the complicated laminate structure. Therefore, we modeled the amorphous metal core loop antenna as an equivalent bulk structure having anisotropic permeability property that we can simulate. We analyzed the receiving sensitivity of the amorphous antenna by calculating the antenna factor. The receiving sensitivity degrades remarkably when an antenna is inside a metal case. We performed further simulation to investigate eddy current losses that cause deterioration.},
keywords={},
doi={10.1093/ietele/e90-c.9.1784},
ISSN={1745-1353},
month={September},}
Copy
TY - JOUR
TI - Performance Evaluation of Built-In Small LF Antennas inside a Metal Case
T2 - IEICE TRANSACTIONS on Electronics
SP - 1784
EP - 1792
AU - Kazuaki ABE
AU - Jun-ichi TAKADA
PY - 2007
DO - 10.1093/ietele/e90-c.9.1784
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 2007
AB - This paper describes a method for evaluating the performance of a small magnetic core loop antenna used for radio controlled watches. Recently, amorphous metal core loop antennas are used as built-in small antennas inside a metal case. It is difficult to perform electromagnetic simulation for amorphous core loop antennas because of the complicated laminate structure. Therefore, we modeled the amorphous metal core loop antenna as an equivalent bulk structure having anisotropic permeability property that we can simulate. We analyzed the receiving sensitivity of the amorphous antenna by calculating the antenna factor. The receiving sensitivity degrades remarkably when an antenna is inside a metal case. We performed further simulation to investigate eddy current losses that cause deterioration.
ER -
English
