ASK modulator for RFID system using a novel variable DGS resonator

Author

Lee, Yoon-Deock ; Nae, Kwan-Kyu ; Lee, Eun-Jin ; Roh, Hyoung-Hwan ; Jung, Jin-Wook ; Han, Young-Kou ; Jung, Jin-Woo ; Baek, Seok-Cheon ; Jung, Myeong-Sub ; Cho, Hong-Goo ; Oh, Ha-Ryoung ; Seong, Yeong-Rak ; Park, Jun-Seok

Author_Institution

Yonsei Univ., Seoul

fYear

2007

fDate

9-12 Oct. 2007

Firstpage

1660

Lastpage

1663

Abstract

In this paper, an ASK (Amplitude Shift Keying) modulator with DGS (Defected Ground Structure) is proposed for 900-MHz RFID (Radio Frequency Identification) system. Proposed variable DGS resonator with a varactor diode will be able to adjust the resonance frequency to achieve the ASK modulation. The variable resonance characteristics can be obtained by controlling capacitance of varactor diode, placed on the defected ground. In order to clarify corresponding method, we manufactured RFID system board using variable DGS resonator and measured corresponding performance. As almost 93% of extracted data from modulation index characteristic is satisfied with both EPC class-1 Gen2 Type-B and Type-C standard protocols, we obtained stable tag response of RFID system.

Keywords

UHF devices; amplitude shift keying; radiofrequency identification; resonators; varactors; ASK modulator; DGS resonator; RFID system; amplitude shift keying modulator; defected ground structure; frequency 900 MHz; modulation index characteristics; radio frequency identification system; varactor diode; variable resonance characteristics; Amplitude modulation; Amplitude shift keying; Capacitance; Data mining; Diodes; Manufacturing; Radiofrequency identification; Resonance; Resonant frequency; Varactors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. European

Conference_Location

Munich

Print_ISBN

978-2-87487-001-9

Type

conf

DOI

10.1109/EUMC.2007.4405531

Filename

4405531