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Paper Abstract and Keywords
Presentation 2017-09-21 14:00
High Frequency Analog Beam Forming by Frequency Control of Local Oscillator
Atsushi Fukuda, Hiroshi Okazaki, Shoichi Narahashi (NTT DOCOMO) MW2017-68 Link to ES Tech. Rep. Archives: MW2017-68
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a novel configuration for a phased array antenna system (PAS) that achieves ultra-broadband transmission using millimeter waves for 5G. Since it is expected to employ an unprecedented number of antennas, the PAS is required to be compact and cost effective. Generally, the PAS employs phase shifters that are applied to the IF or RF transmission signal lines for beam forming. However, the phase shifter limits the bandwidth of the transmission signal due to the required accuracy of the phase adjustment. A PAS employing phase-controlled RF carriers is a promising configuration for broadband transmission. In the proposed configuration, RF carriers are obtained by frequency upconvertion of the phase-controlled local signals with a lower frequency. To confirm the feasibility of the proposed configuration, a two-branch PAS transmitter with phase-controlled RF carriers is configured and tested. Measurement results show that the phase-controlled local signals that have a frequency lower than that of the RF carriers can be used to control the phase difference between the transmitted RF signals.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / Ultra-broadband transmission / array antenna / Beam forming / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 216, MW2017-68, pp. 1-4, Sept. 2017.
Paper # MW2017-68 
Date of Issue 2017-09-14 (MW) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2017-68 Link to ES Tech. Rep. Archives: MW2017-68

Conference Information
Committee AP MW  
Conference Date 2017-09-21 - 2017-09-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Saitama University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, Millimeter wave, Measurement, Antennas and Propagation 
Paper Information
Registration To MW 
Conference Code 2017-09-AP-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High Frequency Analog Beam Forming by Frequency Control of Local Oscillator 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) Ultra-broadband transmission  
Keyword(3) array antenna  
Keyword(4) Beam forming  
1st Author's Name Atsushi Fukuda  
1st Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
2nd Author's Name Hiroshi Okazaki  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Shoichi Narahashi  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Date Time 2017-09-21 14:00:00 
Presentation Time 25 
Registration for MW 
Paper # IEICE-MW2017-68 
Volume (vol) IEICE-117 
Number (no) no.216 
Page pp.1-4 
#Pages IEICE-4 
Date of Issue IEICE-MW-2017-09-14 

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