Presentation 2016-08-29
[Special Invited Talk] Antenna miniaturization and its Impact on the communication quality
Hiroyuki Arai,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Antennas are basic elements in wireless communication systems, transmitting and receiving radio frequency signal over the air. Geometry and material of antennas characterize the performance, which is given by soling Maxwell’s equations. Two major parameters in antennas are radiation pattern and input impedance. The former is the angular dependence of the strength of electromagnetic waves from the antenna and the latter is used as a measure of impedance matching between the antenna and radio equipment. This article focuses on small antennas on small antennas and its impact on the communication quality based on the discussion using a factor of minimum antenna Q, defined by the ratio between stored energy and loss in the antenna or the frequency characteristics of antenna input impedance. This article discusses the Q factor and radiation efficiency of antenna to determine SN ratio in communication systems. Another figure of merit in multi-antenna systems is correlation and its impact on MIMO terminal antennas is also discussed by two-antenna model.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Antenna / Small antenna / Radiation pattern / Input impedance / SN ratio / correlation
Paper # CQ2016-61
Date of Issue 2016-08-22 (CQ)

Conference Information
Committee CQ
Conference Date 2016/8/29(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Tsukubasan
Topics (in Japanese) (See Japanese page)
Topics (in English) Wireless Communication Quality, Cross-Layer Techniques, 5G Mobile Communications and Applications, Wireless Network Protocol Design, Wireless Resource Management, IoT, M2M, etc.
Chair Kyoko Yamori(Asahi Univ.)
Vice Chair Takanori Hayashi(NTT) / Hideyuki Shimonishi(NEC)
Secretary Takanori Hayashi(Osaka Univ.) / Hideyuki Shimonishi(Keio Univ.)
Assistant Hirantha Abeysekera(NTT) / Norihiro Fukumoto(KDDI R&D Labs.)

Paper Information
Registration To Technical Committee on Communication Quality
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) [Special Invited Talk] Antenna miniaturization and its Impact on the communication quality
Sub Title (in English)
Keyword(1) Antenna
Keyword(2) Small antenna
Keyword(3) Radiation pattern
Keyword(4) Input impedance
Keyword(5) SN ratio
Keyword(6) correlation
1st Author's Name Hiroyuki Arai
1st Author's Affiliation Yokohama National University(Yokohama Natl. Univ.)
Date 2016-08-29
Paper # CQ2016-61
Volume (vol) vol.116
Number (no) CQ-202
Page pp.pp.75-75(CQ),
#Pages 1
Date of Issue 2016-08-22 (CQ)