표 3. | Table 3. 본 연구의 결과와 기존 발표된 Ku-대역 도파관 천이구조의 결과 비교 | Comparison of this work and previously published results of Ku-band waveguide transition structures.

Parameters	This Work	Ref. [14]	Ref. [15]
Frequency (GHz)	12~18	12~17	12.4~18
S11 (dB)	≤ −15	≤ −15	≤ −17
S21 (dB)	≥ −0.3	≥ −0.5	≥ −0.5
Substrate	RO4003C	RT5880	air
εr	3.35	2.2	1
tanδ (10 GHz)	0.0027	0.0009	0
Thickness (mil)	12	10	−
BW (GHz) @ S11≤−15 dB	6	6	5.6
Transtion Type	MS-WG	MS-WG	Coax-WG

MS: microstrip, WG: waveguide, Coax: Coaxial.