CST를이용한 UHF RFID tag Antenna...

RFSS Lab. Seminar

Won-Seok Lee2011. 04. 28

wslee@kaist.ac.kr

CST를 이용한 UHF RFID tag Antenna 설계

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

2

다양한 형태의 RFID tag

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

3

일반적인 RFID tag의 등가회로 및 Conjugate Matching

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

4

Loop+Dipole 형태의 RFID tag의 등가회로 및 Conjugate Matching

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

5

사용기판 정보

FR-4

두께 1mm

금속두께 35um

Permittivity (Er) 4.6

loss tangent (σ) 0.015

Tag chip 정보

ALIEN HiggsTM-3

Equivalent input parallel resistance 1500 Ohms

Equivalent input parallel capacitance 0.85 pF

Equivalent input impedance 27.41-200.9j

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

6

35mm

70mm

6mm

Loop+Dipole 형태의 RFID tag 예시

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

7

S11 측정

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

8

Smith Chart

Radio Frequency System Solution Lab.Korea Advanced Institute of Science and Technology

9

방사패턴 측정