Table 2: Comparing measured results for selected SFCRs
RESONANT FREQUENCY (GHz)	TEMPERATURE COEFFICIENT OF FREQUENCY (TYP.) (PPM/°C)	RETURN LOSS AT RESONANCE (TYP.) (dB)	LOADED Q (TYP. AT 50 OHMS)	DIMENSIONS (L X W X H) (mm)
6.8	7.3 (FS material)	9	1100	1.57 3 1.57 3 1.25
8.20	2.3 (CF material)	25	250	5.3 3 5.3 3 0.8
9.95	2.3 (CF material)	11	300	5.6 3 4.3 3 0.8
12.80	2.3 (CF material)	7	350	3.8 × 3.6 × 0.8
18.65	7.3 (FS material)	25	400	6.1 × 5.6 × 1.0