Direct Antenna Modulation scheme for enhanced capacity performance of near-field communication link

Author

Azad, Umar ; Wang, Yuanxun Ethan

Author_Institution

Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA

fYear

2012

Firstpage

88

Lastpage

91

Abstract

Shannon theorem suggests that power coupled through and bandwidth of an inductively coupled near field communication (NFC) link must be traded off for optimal capacity. Direct Antenna Modulation (DAM) is a possible scheme to break this dilemma. With DAM technology utilized in NFC link, the power and bandwidth product limit in a high Q system can be circumvented because of non-linear/time varying operation. In this paper, a NFC link, consisting of identical transmitter and receiver coils of 5 cm radius and 24 turns with a Q value of 35, operating at 283 kHz is used. DAM is implemented on transmitter side and improvement in capacity is experimentally demonstrated for low loaded Q receiver.

Keywords

HF antennas; information theory; modulation; near-field communication; radio links; DAM technology; NFC link; Shannon theorem; bandwidth product limit; direct antenna modulation scheme; enhanced capacity performance; frequency 283 kHz; high Q system; identical transmitter; inductively coupled near field communication link; low loaded Q receiver; near-field communication link; radius 5 cm; receiver coils; Antennas; Capacitors; Coils; Frequency modulation; Receivers; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Antenna Technology (iWAT), 2012 IEEE International Workshop on

Conference_Location

Tucson, AZ

Print_ISBN

978-1-4673-0036-0

Type

conf

DOI

10.1109/IWAT.2012.6178405

Filename

6178405