Directional Couplers

Two structures — unidirectional and bidirectional sampling — both with a 10 MHz lower limit on the main line, 12 dB typical coupling and 15 dB typical directivity.

Main-line Frequency Range10 MHz – 145 GHz
Typical Coupling12 dB
Typical Directivity15 dB

Model Comparison

Model	Type	Frequency Range	Main-line Insertion Loss	Status
SC12-67-01	Unidirectional	0.01–67 GHz	2.0 dB max	In Production
DC12-67-01	Bidirectional	0.01–67 GHz	2.5 dB max	In Production
SC12-110-01	Unidirectional	0.01–110 GHz	2.7 dB max	In Production
DC12-110-01	Bidirectional	0.01–110 GHz	2.9 dB max	In Production
DC12-145(130)-01	Bidirectional	0.01–145 / 130 GHz	3.75 / 3.0 dB max	Sample

Click a model to jump to its specifications and curves below.

MODEL SC12-67-01 67 GHz Unidirectional Directional Coupler Compact unidirectional directional coupler for VNAs up to 67 GHz, with coupled-port isolation better than 59 dB from 10 MHz. In Production 10 MHz – 67 GHz

Electrical Characteristics

Main-line Frequency Range	10 MHz – 67 GHz
Coupling	12 dB typical
Main-line Insertion Loss	2.0 dB max
Main-line VSWR / S11	1.7 max / ≤ −11.7 dB
S31 at 10 MHz	> −59 dB
Directivity	15 dB typical

Mechanical & Interface

Overall envelope 40.61 × 25.71 × 11.20 mm (67 GHz package)

Inquire about SC12-67-01

Test Data

**Main-line Transmission & Matching** Measured

MODEL DC12-67-01 67 GHz Bidirectional Directional Coupler Provides forward and reverse coupled sampling in a single package to monitor incident and reflected waves simultaneously. In Production 10 MHz – 67 GHz

Electrical Characteristics

Main-line Frequency Range	10 MHz – 67 GHz
Coupling	12 dB typical
Main-line Insertion Loss	2.5 dB max
Main-line VSWR / S11	1.50 max / ≤ −14 dB
S31 at 10 MHz	> −59 dB
Directivity	15 dB typical
Coupling-port Isolation	50 dB min

Mechanical & Interface

Overall envelope 45.35 × 33.37 × 11.20 mm (67 GHz package)

Inquire about DC12-67-01

Test Data

**Main-line Transmission |S21|** Measured

**Coupling-port Isolation |S43|** Measured

MODEL SC12-110-01 110 GHz Unidirectional Directional Coupler Unidirectional coupler covering up to 110 GHz, sharing the package family with the 67 GHz models for easy mechanical interchange within a system. In Production 10 MHz – 110 GHz

Electrical Characteristics

Main-line Frequency Range	10 MHz – 110 GHz
Coupling	12 dB typical
Main-line Insertion Loss	2.7 dB max
Main-line VSWR / S11	1.7 max / ≤ −11.7 dB
S31 at 10 MHz	> −59 dB
Directivity	15 dB typical

Mechanical & Interface

Overall envelope 40.61 × 25.71 × 11.20 mm; 110 GHz interface configuration to be confirmed at order

Inquire about SC12-110-01

Test Data

MODEL DC12-110-01 110 GHz Bidirectional Directional Coupler 110 GHz bidirectional coupler with coupling-port isolation improved to 55 dB min, ideal for sampling incident and reflected power simultaneously. In Production 10 MHz – 110 GHz

Electrical Characteristics

Main-line Frequency Range	10 MHz – 110 GHz
Coupling	12 dB typical
Main-line Insertion Loss	2.9 dB max
Main-line VSWR / S11	1.58 max / ≤ −13 dB
S31 at 10 MHz	> −59 dB
Directivity	15 dB typical
Coupling-port Isolation	55 dB min

Mechanical & Interface

Overall envelope 40.61 × 25.71 × 11.20 mm; 110 GHz interface configuration to be confirmed at order

Inquire about DC12-110-01

Test Data

MODEL DC12-145(130)-01 145 / 130 GHz Bidirectional Directional Coupler One platform offers both 145 GHz and 130 GHz configurations, with insertion loss specified according to the interface type. Sample 10 MHz – 145 / 130 GHz

Electrical Characteristics

Interface note: the 145 GHz configuration uses a 0.8 mm interface and the 130 GHz configuration uses a 1.0 mm interface. Their insertion loss specifications differ (3.75 dB / 3.0 dB), so please specify clearly when ordering.

Main-line Frequency Range	10 MHz – 145 / 130 GHz
Coupling	12 dB typical
Main-line Insertion Loss	3.75 / 3.0 dB max
Main-line VSWR / S11	1.44 typical / ≤ −15 dB typical
S31 at 10 MHz	> −59 dB
Directivity	15 dB typical
Coupling-port Isolation	47 dB min / 50 dB typical

Mechanical & Interface

Package dimensions follow the assembly drawing of the ordered 0.8 mm / 1.0 mm configuration

Inquire about DC12-145(130)-01

Test Data

**Coupling-port Isolation |S34|** Measured

Need a coupler for a specific band or interface?

Specific band plans and interface types from 10 MHz to 145 GHz can be customized. Please provide your target bands and system topology and we will respond after evaluation.