CBF-A Series
3-PORT DIRECTIONAL COUPLERS
5 to 2000 MHz / Multi-Octave / 10 & 20 dB Models / Hi-Reliability Hermetic Package / Flatpack
PRINCIPAL SPECIFICATIONS
Model
Number
CBF-10A-375
CBF-20A-375
Frequency Performance
Range,
Bandwidth,
MHz
MHz
5 - 750
5 - 750
5 - 750
5 - 750
10 - 400
100 - 2000
500 - 1000
100 - 2000
500 - 1000
¤ Coupling
dB,
Nom.
10
±
1.0
20
±
1.0
20
±
1.0
11
±
1.0
11
±
1.0
20
±
1.0
20
±
1.0
Frequency
Sensitivity,
dB, Max.
±
0.5
±
0.75
±
0.5
±
0.5
±
0.5
±
0.5
±
0.5
Directivity,
dB,
Min.
20
18
20
18
20
18
20
*Insertion
Loss, dB,
Max.
1.3
1.0
0.6
1.5
1.2
1.5
1.2
VSWR,
Max.
1.5:1
1.5:1
1.3:1
1.7:1
1.5:1
1.7:1
1.5:1
CBF-11A-1250 100 - 2000
CBF-20A-1250 100 - 2000
¤ Coupling is Referenced to the Input
* Insertion Loss excludes Coupling Loss
A-Size Package Outline
GENERAL SPECIFICATIONS
Impedance:
CW Input:
Weight, nominal:
Operating Temperature:
50
Ω
nom.
1 W max.
0.1 oz (2.8 g)
-- 55° to +85°C
OPTIONS
Coupling Values:
5 to 30 dB
Higher Frequency:
up to 2.5 GHz
Close Tolerance Coupling:
±
0.5 dB
General Notes:
1. Directional couplers are useful for monitoring incident and
reflected power, signal sampling, control loops and BITE.
2. The CBF-A series consists of 3 port devices with one port
internally terminated. They may be used back-to-back as dual
directional couplers. The CRF-A series of bi-directional couplers
provides direct access to both coupled ports.
3. Merrimac couplers may be ordered with specific coupling values
up to 30 dB and over selected frequency bands up to 18 GHz in
microwave packages.
4. These units comply with the applicable portions of MIL-C-15370
and can be supplied screened to comply with additional
specifications you designate for military and aerospace
applications requiring higher reliability.
09Apr96
NOTES:
1. Tolerance on 3 place decimals
±
.010(.25) except as noted.
2. Dimensions in inches over millimeters.
3. Dimensions marked with * apply only at body.
4. All unmarked pins are case ground.
For further information contact
MERRIMAC / 41 Fairfield Pl., West Caldwell, NJ, 07006 / 973-575-1300 / FAX 973-575-0531
MERRIMAC [ MERRIMAC INDUSTRIES, INC. ]
