Title :
A Lumped-Element Directional Coupler With High Isolation for Mobile RFID Reader
Author :
Jonghun Jung ; Geunyong Lee ; Jong-In Song
Author_Institution :
Dept. of Inf. & Commun, Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea
Abstract :
A lumped-element directional coupler with a high isolation characteristic for mobile RFID reader systems is proposed and experimentally demonstrated. Compared with the conventional lumped-element circuit, the proposed structure utilizes compensation capacitors and achieves a very high isolation despite low quality factor on-chip inductors. It was fabricated on a high-resistivity silicon substrate and showed an isolation of 79 dB, a coupling level of 14.8 dB, and an insertion loss of 1.74 dB at 910 MHz.
Keywords :
directional couplers; radiofrequency identification; frequency 910 MHz; high isolation directional coupler; loss 1.74 dB; low quality factor; lumped element directional coupler; mobile RFID reader; on-chip inductor; Capacitors; Couplings; Directional couplers; Inductors; Mobile communication; Radiofrequency identification; High isolation; high-resistivity silicon substrate; lumped-element directional coupler; mobile RFID reader;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2014.2313586
