그림 1. 제안된 마이크로스트립 CSS-DGS 기반 고감도 센서 구조와 S-변수 특성 Fig. 1. Geometry and S-parameter characteristics of proposed enhanced-sensitivity sensor based on microstrip CSS-DGS.
그림 2. 기존의 DR-CSRR 기반 센서 구조와 S-변수 특성 Fig. 2. Geometry and S-parameter characteristics of conventional sensor based on DR-CSRR.
그림 3. SUT의 비유전율 변화에 따른 두 센서의 S21 특성: (a) DR-CSRR 기반 센서, (b) CSS-DGS 기반 센서 Fig. 3. S21 characteristics of two sensors for varying relative permittivity of SUT: (a) DR-CSRR-based sensor, (b) CSS-DGS-based sensor.
그림 4. 두 센서의 성능 비교: (a) 공진 주파수 이동, (b) 감도, (c) DR-CSRR 기반 센서와 비교할 때 CSS-DGS 기반 센서의 감도 향상 Fig. 4. Comparison of performances for two sensors: (a) resonant frequency shift, (b) sensitivity, (c) sensitivity enhancement of CSS-DGS-based sensor compared to DR-CSRR-based sensor.
그림 5. 제작된 센서 사진: (a) DR-CSRR 기반 센서, (b) CSS-DGS 기반 센서 Fig. 5. Photographs of fabricated sensors: (a) DR-CSRRbased sensor, (b) CSS-DGS-based sensor.
그림 6. 표 1의 SUT 5종에 대한 두 센서의 S21 특성: (a) DR-CSRR 기반 센서, (b) CSS-DGS 기반 센서 Fig. 6. S21 characteristics of two sensors for five SUTs in Table 1: (a) DR-CSRR-based sensor, (b) CSS-DGS-based sensor
그림 7. SUT 5종에 대한 두 센서의 성능 시뮬레이션: (a) 공진 주파수 이동, (b) 감도, (c) DR-CSRR 기반 센서와 비교할 때 CSS-DGS 기반 센서의 감도 향상 Fig. 7. Simulated performances of two sensors for five SUTs: (a) resonant frequency shift, (b) sensitivity, (c) sensitivity enhancement of CSS-DGS-based sensor compared to DR-CSRR-based sensor
그림 8. 측정 사진: (a) SUT가 없을 때(unloaded), (b) SUT가 있을 때(loaded) Fig. 8. Photographs of experiment: (a) without SUT(unloaded), (b) with SUT(loaded)
그림 9. SUT 5종에 대한 두 센서의 측정된 S21 특성: (a) DR-CSRR 기반 센서, (b) CSS-DGS 기반 센서 Fig. 9. Measured S21 characteristics of two sensors for five SUTs: (a) DR-CSRR- based sensor, (b) CSS-DGS-based sensor
그림 10. SUT 5종에 대한 두 센서의 측정된 성능 비교: (a) 공진 주파수 이동, (b) 감도, (c) DR-CSRR 기반 센서와 비교할 때 CSS-DGS 기반 센서의 감도 향상 Fig. 10. Measured performance comparison of two sensors for five SUTs: (a) resonant frequency shift, (b) sensitivity, (c) sensitivity enhancement of CSS-DGS-based sensor compared to DR-CSRR-based sensor,
표 1. SUT로 사용된 5개 taconic 기판의 비유전율, 손실탄젠트 및 두께 Table 1. Relative permittivity, loss tangent, and thickness of five taconic substrates used as SUT.
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