CL3 high directivity coupler

The series CL3 high directivity coupler covers 18 to 170 GHz in nine waveguide bands. The coupler is offered with coupling values of 10, 20, 30 or 40 dB, and covers a full waveguide band. It has directivity of 37 dB up to 60 GHz and drops to 28 dB up to 170 GHz.

Electrical Specifications

Model	CL3-42	CL3-28	CL3-22	CL3-19	CL3-15
Frequency band and range (GHz)	K 18-26.5	Ka 26.5-40	Q 33-50	U 40-60	V 50-75
Coupling value (dB) (Notes 1,2)	10, 20 (30, 40)
Coupling flatness (±dB) (max)	0.7	0.7	0.7	0.7	0.7
Insertion loss (dB) (max)  (Notes 3)	0.8	0.8	0.8	0.8	1.1
Directivity (dB) (min) (Note 4)	32	37 (33)	37 (33)	37 (33)	34 (30)
Main line VSWR (max)	1.06:1	1.06:1	1.06:1	1.06:1	1.08:1
Secondary line VSWR (max)	1.1:1	1.1:1	1.1:1	1.1:1	1.1:1
Model	CL3-12	CL3-10	CL3-08	CL3-06
Frequency band and range (GHz)	E 60-90	W 75-110	F 90-140	D 110-170
Coupling value (dB) (Notes 1,2)	10, 20 (30, 40)
Coupling flatness (±dB) (max)	0.7	0.7	0.7	0.7
Insertion loss (dB) (typ)  (Note 3)	1.5 (1.1)	1.5	2.2	2.5
Directivity (dB) (min) (Note 4)	32 (30)	32 (28)	28 (24)	28 (24)
Main line VSWR (max)	1.1:1 (1.08:1)	1.1:1	1.15:1	1.5:1
Secondary line VSWR (max)	1.1:1	1.15:1	1.2:1	1.5:1

1) Coupling value =-10 log₁₀ (P3/P1)
2) For power dividers, please see series CSS or CMT.
3) Applies to 20 dB units only. Add 0.5dB for 10dB units.
4) Directivity = Coupling Value - 10 log₁₀ (P3/P2)