CGC crossguide coupler

The series CGC crossguide coupler covers 18 to 170 GHz in nine waveguide bands. The typical coupling value is 20 dB, with directivity of 17 dB up to 110 GHz and 12 dB above 110 GHz. For complete coverage of each waveguide band, two models are offered, each covering 70% of the waveguide band. Series CGC is offered with the fourth port (the isolated port) either internally terminated or left open.

Electrical Specifications

Model		CGC-42	CGC-28	CGC-22	CGC-19	CGC-15
Frequency band and range (GHz)		K 18-26.5	Ka 26.5-40	Q 33-50	U 40-60	V 50-75
Bandwidth (GHz) (Note 1)	Lowband	18-23.95	26.5-35	33-44	40-54	50-67
	Highband	20.55-26.5	30-40	38-50	46-60	57-75
Insertion loss (dB) (max)		0.5	0.5	0.5	0.6	0.6
Directivity (dB) (min) (Note 2)		17	17	17	17	17
Main line VSWR (max)		1.15:1	1.15:1	1.15:1	1.15:1	1.15:1
Secondary line VSWR (max)		1.2:1	1.2:1	1.2:1	1.2:1	1.21:1
Model		CGC-12	CGC-10	CGC-08	CGC-06
Frequency band and range (GHz)		E 60-90	W 75-100	F 90-140	D 110-170
Bandwidth (GHz) (Note 1)	Lowband	60-81	75-99	90-125	110-152
	Highband	69-90	85-110	105-140	128-170
Insertion loss (dB) (max)		1	1	1.5	1.7
Directivity (dB) (min) (Note 2)		17	17	12	12
Main line VSWR (max)		1.2:1	1.2:1	1.2:1	1.5:1
Secondary line VSWR (max)		1.25:1	1.25:1	1.25:1	1.5:1

1) See series CL3 or CL4 for fullband performance and greater directivity.
2) 3-port version only. Directivity for 4-port version is 12 dB from K- to W-Band and 7 dB for F- to D-Band.
Note: Coupling value is 20 ± 3 dB overall, including flatness for 3 port-version only.