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Short Slot Hybrid Couplers - CSS

Features:

  • Low insertion loss
  • 90° relative phase
  • Compact, in-line port arrangement
  • Covers up to 50% waveguide band

Applications:

  • Power distribution network
  • Diplexer, phase detectors
  • General purpose power dividers
  • Subsystems

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Download the CSS specsheet (.pdf)

Description

Millitech series CSS short slot couplers are ideal for applications where in-line power division or combining is required. The two outputs have 90° phase difference and nearly equal power levels over 5% of center frequency with minimum insertion loss.

These couplers are useful as power dividers for over 50% of the waveguide band. Three couplers can be connected together to make a four-way power divider. All units can bolt to blind flanges through access holes at the top and bottom of each flange.

These hybrid couplers can be used to configure a frequency diplexer for two frequencies within a 20% bandwidth. Millitech can provide a completely tested frequency diplexer to meet your requirements.

Millitech also offers series CL3 and CL4 high directivity directional couplers, series CMT hybrid couplers, series CGC crossguide couplers, and compact 4- and 8-way custom power dividers/combiners. Higher order units are available upon request.

Electrical Specifications

Model Number CSS-42 CSS-28 CSS-22 CSS-19 CSS-15 CSS-12 CSS-10 CSS-08 CSS-06
Frequency band K Ka Q U V E W F D
Insertion loss of either output port(dB) (max)*1 0.5 0.5 0.5 0.5 0.8 0.8 1.0 1.0 1.5
Bandwidth, % center frequency*2 5% 5% 5% 5% 5% 5% 5% 5% 5%
Isolation between output ports(dB) (typ)*3 20 20 20 20 20 20 20 20 18
Standard center frequencies available (GHz)*4 24 29, 37 40 46, 56 60 80 94 140 140

*1 – Insertion loss includes 3 dB nominal power split with 90° relative phase.
*2 – Operation over broader bandwidth (up to 50%) achieved with degraded performance.
*3 – All specifications are tested with the isolated port terminated with a series WRT termination, offered separately.
*4 – These frequencies are for standard units; other frequencies available upon request.

Port Arrangement

CSS - Port Arrangement

Outline Drawings

CSS - Outline Drawings

Mechanical Specifications

Model Number CSS-42 CSS-28 CSS-22 CSS-19 CSS-15 CSS-12 CSS-10 CSS-08 CSS-06
A (in/mm) 2.5/66 2.25/57.1 2.25/57.1 2.25/57.1 1.5/38.1 1.5/38.1 1.5/38.1 1.5/38.1 1.5/38.1
B (in/mm) .88/22 0.75/19 0.75/19 0.75/19 0.75/19 0.75/19 0.75/19 0.75/19 0.75/19
C (in/mm) .69/18 0.56/14.2 0.56/14.2 0.56/14.2 0.38/9.6 0.38/9.6 0.38/9.6 0.38/9.6 0.38/9.6
D (in/mm) 1.82/46 1.69/42.9 1.69/42.9 1.69/42.9 1.13/28.7 1.13/28.7 1.13/28.7 1.13/28.7 1.13/28.7
Flange MIL.F-3922 /54-001* /54-003* /67B-006 /67B-007 /67B-008 /67B-009 /67B-010 /67B-M08 /67B-M06

*With #4-40 threaded holes.

How to Order

Specify Model Number
CSS-XX-ABBBC0
XX =Waveguide Band
  • WR – number
A= Flange Type
  • R – round (WR-22 through WR-06 only)
  • S – square (WR-42 and WR-28 only)
BBB= Center Frequency
  • Example: – 094 = 94GHz (other frequencies available)
C= Material
  • A – aluminum (gold plated)
  • B – brass (gold plated)
0= Other Options
  • N – nonstandard (please specify requirements)

Example:

To Order: a standard brass WR-10 series with a round flange and center frequency 94 GHz

Specify: CSS-10-R094B0