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Space Qualified Directional Coupler 101040010-SQ


Model Number


Freq. Min. (GHz)


Freq. Max. (GHz)

Nominal Coupling
10 ±1.0
Frequency Sensitivity (dB)
Insertion Loss (dB Max)
1-20 GHz: 1.30 20-40 GHz: 2.00
Directivity (dB Min)
1-20 GHz: 14 20-40 GHz: 10
VSWR (Max)
1-20 GHz: 1.50 20-40 GHz: 1.70
Power Rating (Watts)
Standard Connectors (Female)
2.4 mm


1.0 – 40.0 GHz Ultra-Broadband Frequency Operation

Space Qualified Directional Coupler

10 dB Coupling

Frequency Sensitivity: ±1.52 dB

Compact Size

2.4-mm Female Connectors

Product Description

KRYTAR specializes in the design and manufacturing of ultra-broadband, high-performance microwave components and test equipment for both commercial and military space applications. Products manufactured for Space Applications undergo additional reliability and quality assurance inspections during all phases of assembly, electrical evaluation, and shock/vibration testing. Parts, materials and processes are fully traceable from subordinate to top-level assemblies. KRYTAR can also provide customized solutions to meet your application-specific requirements. Our successful space heritage offers qualities you can depend on including: offering innovative products, quick-reaction capability, design responsiveness, flexibility, fast production turn-around, and partnerships with our customers.

KRYTAR’s directional couplers are uniquely designed for systems applications where external levelling, precise monitoring, signal mixing or swept transmission and reflection measurements are required.

KRYTAR’s latest addition, Model 101040010-SQ, enhances the selection of multi-purpose, stripline designs that exhibit excellent coupling over an ultra-broadband frequency range of 1.0 to 40.0 GHz in a single, compact and lightweight package.

In addition, Model 101040010-SQ offers superior performance ratings including Nominal Coupling (with respect to output) of 10 dB, ±1.0 dB, and Frequency Sensitivity of ±1.52 dB. The directional coupler exhibits Insertion Loss (including coupled power) of less than 1.3 dB (1-20 GHz) and 1.7 dB (20-40 GHz),

The directivity of greater than 14 dB (1-20 GHz) and 10 dB (20-40 GHz), Maximum VSWR (any port) is 1.5 (1- 20 GHz) and 1.7 (20-40 GHz), Input Power Rating is 20 W average and 3 kW peak. The directional coupler comes with industry-standard 2.4-mm Female Connectors. The compact package measures just 2.00 inches (L) x 0.40 inches (W) x 0.65 inches (H) and weighs only 1.3 ounces.

KRYTAR's coupler is uniquely designed for systems applications where external levelling, precise monitoring, signal mixing or swept transmission and reflection measurements are required. KRYTAR couplers offer solutions for many applications including Space, electronic warfare (EW), commercial wireless, SATCOM, radar, signal monitoring and measurement, antenna beam forming, and EMC testing environments. For many space-restricted applications, the compact size makes KRYTAR directional couplers ideal solutions. The directional coupler can also be manufactured to meet rigid military specifications.

KRYTAR also offers complete engineering services for custom designs that meet or exceed critical performance and/or packaging specifications.

Common Definitions

Directional Couplers: Components that allow two microwave circuits to be combined into one integrated

 Microwave Frequency Bands
Band Designation Frequency Range (GHz)
UHF 300 MHz – 1.0 GHz
L 1.0 – 2.0
S 2.0 – 4.0
C 4.0 – 8.0
X  8.0 – 12.0
DBS 12.2 – 12.7
Ku 12.0 – 18.0
K 18.0 – 26.5
Ka  26.5 – 40.0
Q  30.0 – 50.0
U  40.0 – 60.0
V  50.0 – 75.0

system in one direction with the two completely isolated from each other in the opposite direction.

Couplers are passive microwave components used for distributing or combining microwave signals. Directional couplers are four-port circuits where one port is isolated from the input port.

The coupled port on a microstrip, or stripline directional coupler, is closest to the input port because it is a backward wave coupler. On a waveguide broadwall directional coupler, the coupled port is closest to the output port because it is a forward wave coupler.

VSWR (Voltage Standing Wave Ratio) is defined as the ratio of the maximum voltage to the minimum voltage in standing wave pattern along the length of a transmission line structure. It varies from 1 to (plus) infinity and is always positive.

Insertion Loss is the net unrecoverable power in dB dissipated within the circuit at any frequency within the specified range.

Frequency Sensitivity is the amount of frequency change in the carrier frequency per unit amplitude change in the message signal.

Additional Resources

For more information on Krytar’s Couplers and Space Solutions Capabilities please see below:

KRYTAR Ultra-Broadband Microwave Components and Test Equipment DC-67 GHz

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