Compact Size Directional Coupler for Mobile RFID Reader

Author

Jung, Jin-Wook ; Nae, Kwan-Kyu ; Bae, Jae-Hyun ; Lee, Eun-Jin ; Oh, Ha-Ryoung ; Seong, Yeong-Rak ; Park, Jun-Seok

Author_Institution

Kookmin Univ., Seoul

fYear

2007

fDate

3-8 June 2007

Firstpage

987

Lastpage

989

Abstract

In order to offer RFID services on mobile phones, the RFID reader must be embedded on the handset as a chip. However, the directional coupler, a ceramic passive component used in conventional handsets, of an RFID system using an identical Tx/Rx carrier frequency has a significant volume limitation compared to active components. This paper presents the directional coupler design for UHF RFID mobile reader using IPD (integrated passive device) process. The parallel-coupled line theory has been used for formulation of a T and pi-type coupler. Coupler with dimensions of 1.74times1.6, and 1.32times1.4 mm was assembled using the IPD process.

Keywords

MMIC; UHF couplers; UHF devices; ceramics; directional couplers; mobile handsets; radiofrequency identification; IPD process; MMIC; T coupler; UHF RFID mobile reader; ceramic passive component; compact size directional coupler design; integrated passive device; mobile phones; parallel-coupled line theory; pi-type coupler; Ceramics; Coupling circuits; Directional couplers; Equivalent circuits; Frequency; Mobile handsets; Passive RFID tags; Radiofrequency identification; Semiconductor process modeling; Telephone sets; Directional Couplers; IPD; Passive device; RFiD;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium, 2007. IEEE/MTT-S International

Conference_Location

Honolulu, HI

ISSN

0149-645X

Print_ISBN

1-4244-0688-9

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2007.380185

Filename

4263991