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AS9100 Rev C, ISO 9001:2008,
ISO 14001:2004 and OHSAS 18001:2007

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3 or 4-Port Loss Loss Directional Couplers - CE3/CE4

Features:

  • Insertion loss as low as 0.6 dB
  • High directivity
  • VSWR as low as 1.20:1

Applications:

  • Test and instrumentation
  • Subsystems
  • Precision measurement systems

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Download the CE3/CE4 specsheet (.pdf)

Description

Millitech series CE3/CE4 3 or 4 port low loss directional couplers are available from 75 to 325 GHz, with a coupling value of 15 dB. These couplers have directivity of up to 35 dB with insertion loss as low as 0.6 dB for W-band (WR-10) and 0.85 dB for 220-325 GHz (WR-03). They operate over full waveguide bands with coupling flatness of as little as ± 0.6 dB (W-band).

CE4 4-port couplers are offered in a bi-directional configuration and should be ordered with an external load connected to one of the coupled arms for test purposes.

Series CE3/CE4 couplers are produced using a rugged split-block construction. Low loss high directivity couplers are convenient for extracting or introducing a small fraction of power from and/or into a waveguide circuit without disturbing the operating characteristics of the circuit.

These couplers are particularly suitable for measurement of RF power (transmitted or reflected) in circuits, for scalar network analyzers, and for signal sampling in instruments or subsystems. Millitech also offers series CL3/CL4 3 or 4 port high directivity couplers which offer higher directivity from WR-28 through WR-06.

CE3 / CE4 Electrical Specifications

Model Number CE3 / 4-10 CE3 / 4-08 CE3 / 4-06 CE3 / 4-05 CE3 / 4-04 CE3 / 4-03
Frequency band and range (GHz) W
75-110
F
90-140
D
110-170
G
140-220
170-260 220-325
Coupling Value (dB)*1,*2 / Coupling Loss (dB) 15 ± 2 / 0.14 dB @15 dB coupling
Insertion Loss (dB) (max)*4 0.60 0.65 0.70 0.75 0.80 0.85
Coupling Flatness (+/-dB) (max) 0.6 0.65 0.7 0.75 0.8 0.85
Directivity (dB) (min)*3 35/40 32/37 28/33 25/30 22/27 20/25
VSWR (max) – All Ports 1.2:1 1.3:1 1.5:1 1.5:1 1.6:1 1.8:1
*1 – Coupling value =-10 log10 (P3/P1).
*2 – For power dividers, please see series CSS or CMT.
*3 – Directivity = Coupling Value - 10 log10 (P3/P2).
*4 – Insertion Loss is the power loss in addition to coupling loss.
CE3-4 Electrical Specifications Diagrams

CE3 Outline Drawings

CE3 - Outline Drawings

Mechanical Specifications

Model Number CE3-10-AXX CE3-08-AXX CE3-06-AXX CE3-05-AXX CE3-04-AXX CE3-03-AXX
Waveguide WR-10 WR-08 WR-06 WR-05 WR-04 WR-03
Flange Pattern
Compatible with
MIL-DTL-3922/67C.
Refer to IS000131.
010 M08 M06 M05 M04 M03
“A” Dimension 2.25”
(57.2 mm)
1.90”
(48.3 mm)
1.55”
(39.4 mm)
1.375”
(35 mm)
“B” Dimension .75”
(19.1 mm)
.50”
(12.7 mm)
“C” Dimension .125”
(3.2 mm)
.25”
(6.4 mm)
Approx. Mass .11 lbs
(49.9 grams)
.09 lbs
(40.8grams)
.08 lbs
(36.3 grams)
.07 lbs
(31.8 grams)
Material Brass 360
Finish Gold Plate

CE4 Outline Drawings

 CE4 - Outline Drawings

Mechanical Specifications

Model Number CE4-10-AXX CE4-08-AXX CE4-06-AXX CE4-05-AXX CE4-04-AXX CE4-03-AXX
Waveguide WR-10 WR-08 WR-06 WR-05 WR-04 WR-03
Flange Pattern
Compatible with
MIL-DTL-3922/67C.
Refer to IS000131.
010 M08 M06 M05 M04 M03
“A” Dimension 2.375”
(60.33 mm)
2.00”
(50.8 mm)
1.55”
(39.4 mm)
1.525”
(38.7 mm)
“B” Dimension .75”
(19.1 mm)
.50”
(12.7 mm)
“C” Dimension .125”
(3.2 mm)
.25”
(6.4 mm)
Approx. Mass .107 lbs
(48.5 grams)
.091 lbs
(41.3 grams)
.077 lbs
(35.1 grams)
.078 lbs
(35.5 grams)
Material Brass 360
Finish Gold Plate

How to Order

Specify Model Number
CE#-XX-ABB00
# = 3 or 4
  • 3 – 3-Port (CE3)
  • 4 – 4-Port (CE4) - Bidirectional
XX = Waveguide Band
  • WR – number
A= Flange Type
  • A – Precision Anti-cocking (No Ring or Boss)
BB= Coupling Level (in dB)*
  • 15 – 15 dB
0= Other Options*

* Other coupling ranges and options available as a custom configuration, special order. Please consult Millitech for details.

Example:

To Order: A WR-10, 3-port low loss directional coupler with a precision anti-cocking flange and 15 dB coupling.

Specify: CE3-10-A1500