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Passive Waveguide Components

Standard MMW Components
Millitech Passive Waveguide Components

Crossguide Coupler (CGC) 3-Port High Directivity Coupler (CL3) 4-Port High Directivity Coupler (CL4) Magic Tee Hybrid Coupler  (CMT) Short Slot Hybrid 90° Coupler (CSS) Level Set Attenuator (LSA) Fixed Attenuators (FXA) Variable Phase Shifter (VPS) Waveguide Products Customized Components Back to MMW Product Family List

Passive Waveguide Products
 
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The series CGC crossguide coupler covers 18 to 170 GHz in nine waveguide bands. The typical coupling value is 20 dB, with directivity of 17 dB up to 110 GHz and 12 dB above 110 GHz. For complete coverage of each waveguide band, two models are offered, each covering 70% of the waveguide band. Series CGC is offered with the fourth port (the isolated port) either internally terminated or left open.

This document link requires Adobe ReaderClick Here to download the CGC product datasheet

Electrical Specifications

Model CGC-42 CGC-28 CGC-22 CGC-19 CGC-15
Frequency band and range (GHz) K
18-26.5
Ka
26.5-40
Q
33-50
U
40-60
V
50-75
Bandwidth (GHz) (Note 1) Lowband 18-23.95 26.5-35 33-44 40-54 50-67
Highband 20.55-26.5 30-40 38-50 46-60 57-75
Insertion loss (dB) (max) 0.5 0.5 0.5 0.6 0.6
Directivity (dB) (min) (Note 2) 17 17 17 17 17
Main line VSWR (max) 1.15:1 1.15:1 1.15:1 1.15:1 1.15:1
Secondary line VSWR (max) 1.2:1 1.2:1 1.2:1 1.2:1 1.21:1
 
Model CGC-12 CGC-10 CGC-08 CGC-06  
Frequency band and range (GHz) E
60-90
W
75-100
F
90-140
D
110-170
 
Bandwidth (GHz) (Note 1) Lowband 60-81 75-99 90-125 110-152  
Highband 69-90 85-110 105-140 128-170  
Insertion loss (dB) (max) 1 1 1.5 1.7  
Directivity (dB) (min) (Note 2) 17 17 12 12  
Main line VSWR (max) 1.2:1 1.2:1 1.2:1 1.5:1  
Secondary line VSWR (max) 1.25:1 1.25:1 1.25:1 1.5:1  

1) See series CL3 or CL4 for fullband performance and greater directivity.
2) 3-port version only. Directivity for 4-port version is 12 dB from K- to W-Band and 7 dB for F- to D-Band.
Note: Coupling value is 20 ± 3 dB overall, including flatness for 3 port-version only.

The series CL3 high directivity coupler covers 18 to 170 GHz in nine waveguide bands. The coupler is offered with coupling values of 10, 20, 30 or 40 dB, and covers a full waveguide band. It has directivity of 37 dB up to 60 GHz and drops to 28 dB up to 170 GHz.

This document link requires Adobe ReaderClick Here to download the CL3 product datasheet

Electrical Specifications

Model CL3-42 CL3-28 CL3-22 CL3-19 CL3-15
Frequency band and range (GHz) K
18-26.5
Ka
26.5-40
Q
33-50
U
40-60
V
50-75
Coupling value (dB) (Notes 1,2) 10, 20 (30, 40)
Coupling flatness (±dB) (max) 0.7 0.7 0.7 0.7 0.7
Insertion loss (dB) (max)
(Notes 3)
0.8 0.8 0.8 0.8 1.1
Directivity (dB) (min) (Note 4) 32 37 (33) 37 (33) 37 (33) 34 (30)
Main line VSWR (max) 1.06:1 1.06:1 1.06:1 1.06:1 1.08:1
Secondary line VSWR (max) 1.1:1 1.1:1 1.1:1 1.1:1 1.1:1
 
Model CL3-12 CL3-10 CL3-08 CL3-06  
Frequency band and range (GHz) E
60-90
W
75-110
F
90-140
D
110-170
 
Coupling value (dB) (Notes 1,2) 10, 20 (30, 40)
Coupling flatness (±dB) (max) 0.7 0.7 0.7 0.7  
Insertion loss (dB) (typ)
(Note 3)
1.5 (1.1) 1.5 2.2 2.5  
Directivity (dB) (min) (Note 4) 32 (30) 32 (28) 28 (24) 28 (24)  
Main line VSWR (max) 1.1:1
(1.08:1)
1.1:1 1.15:1 1.5:1  
Secondary line VSWR (max) 1.1:1 1.15:1 1.2:1 1.5:1  

1) Coupling value =-10 log10 (P3/P1)
2) For power dividers, please see series CSS or CMT.
3) Applies to 20 dB units only. Add 0.5dB for 10dB units.
4) Directivity = Coupling Value - 10 log10 (P3/P2)

CL3 Diagram

The series CL4 high directivity coupler are available from 18 to 170 GHz, with coupling values of 10, 20, 30 and 40 dB. These couplers have directivity of up to 35 dB with insertion loss as low as 0.8 dB for frequencies below 60 GHz, and 1.5 dB for W-band (WR-10). They operate over full waveguide bands with coupling flatness of less than +/- 0.7 dB.

This document link requires Adobe ReaderClick Here to download the CL4 product datasheet

Electrical Specifications

Model Number CL4-42 CL4-28 CL4-22 CL4-19
Frequency Band and Range (GHz) K
18-26.5
Ka
26.5-40
Q
33-50
U
0-60
4-Port Bidirectional Couplers (Note 1)
Coupling Value (dB)(Note 2) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40)
Coupling Flatness (±dB) Max. 0.7 (0.7) 0.7 (0.7) 0.7 (0.7) 0.7 (0.7)
Insertion Loss (dB) Max. (Note 3) 0.8 (0.8) 0.8 (0.8) 0.8 (0.8) 0.8 (0.8)
Directivity (dB) (min) (Note 4) 35 (33) 35 (33) 35 (33) 35 (33)
Main Line VSWR Max. 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1)
Secondary Line VSWR Max. 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1)
4-Port Dual Couplers
Coupling Value (dB)(Note 2) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40)
Coupling Flatness (±dB) Max. 0.7 (0.7) 0.7 (0.7) 0.7 (0.7) 0.8 (0.9)
Insertion Loss (dB) Max. (Note 3) 1 (1) 1 (1) 1 (1) 1.2 (1.2)
Directivity (dB) (min) (Note 4) 35 (33) 35 (33) 35 (33) 35 (33)
Main Line VSWR Max. 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1)
Secondary Line VSWR Max. 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1) 1.1:1 (1.1.1)

Model Number CL4-15 CL4-12 CL4-10 CL4-08
Frequency Band and Range (GHz) V
50-75
E
60-90
W
75-110
F
90-140
4-Port Bidirectional Couplers (Note 1)
Coupling Value (dB)(Note 2) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40) 10, 20
Coupling Flatness (±dB) Max. 0.7 (0.7) 0.7 (0.7) 0.7 (0.7) 0.7
Insertion Loss (dB) Max. (Note 3) 1.1 (1.1) 1.5 (1.5) 2 (2) 2.2
Directivity (dB) (min) (Note 4) 33 (30) 31 (28) 31 (28) 27
Main Line VSWR Max. 1.1:1 (1.1.1) 1.15:1 (1.15.1) 1.15:1 (1.15.1) 1.2:1
Secondary Line VSWR Max. 1.1:1 (1.1.1) 1.15:1 (1.15.1) 1.15:1 (1.15.1) 1.2:1
4-Port Dual Couplers
Coupling Value (dB)(Note 2) 10, 20 (30,40) 10, 20 (30,40) 10, 20 (30,40) 10, 20
Coupling Flatness (±dB) Max. 0.8 (1.0) 0.8 (1.1) 0.9 (1.2) 1
Insertion Loss (dB) Max. (Note 3) 1.5 (1.5) 1.9 (1.9) 2 (2) 2.4
Directivity (dB) (min) (Note 4) 33 (30) 31 (28) 31 (28) 27
Main Line VSWR Max. 1.1:1 (1.1.1) 1.15:1 (1.15.1) 1.15:1 (1.15.1) 1.2:1
Secondary Line VSWR Max. 1.1:1 (1.1.1) 1.15:1 (1.15.1) 1.15:1 (1.15.1) 1.2:1

Notes:
1) All specifications for the bi-directional coupler are tested using an external load series WTR.
2) Coupling value =-10 log10 (P3/P1)
3) Typical for 20, 30, and 40 dB units only. Add 0.5dB for 10dB units. 4) Directivity = Coupling Value - 10 log10 (P4/P1)
5) Typical for 30 and 40 dB units only. Add 0.1dB for 20dB units and 0.9dB for 10dB units.

CL4 Diagram

The series CMT magic tee hybrid coupler covers 18 to 170 GHz in nine waveguide bands. Each coupler is offered in two versions, one providing a bandwidth of 60% and the other providing a bandwidth of 90%.

This document link requires Adobe ReaderClick Here to download the CMT product datasheet

Electrical Specifications

Model CMT-42 CMT-28 CMT-22 CMT-19 CMT-15
Frequency band K Ka Q U V
60% and 90% Bandwidth Versions (Note1)
Frequency coverage: 90% bandwidth version (GHz) 18-25 26.5-38 33-48 40-58 50-72
Bandwidth: 60% bandwidth version (GHz center) 5 8 10 12 15
Selectable center frequency range: 60% bandwidth version (GHz) 20.5-22.5 30.5-34 38-43 46-52 57.5-64.5
Insertion loss (dB) (max) 0.5 0.5 0.7 0.8 1
VSWR (max) H-Arm ports 1.5:1 1.5:1 1.5:1 1.5:1 1.5:1
E-Arm ports 1.6:1 1.6:1 1.6:1 1.6:1 1.6:1
Isolation (min) E- to H- arms 30 30 30 30 30
Co-linear arms 20 20 20 20 20
Balance (± dB) (max) 0.5 0.5 0.5 0.5 0.5
 
Model CMT-12 CMT-10 CMT-08 CMT-06  
Frequency band E W F D  
60% and 90% Bandwidth Versions (Note1)
Frequency coverage: 90% bandwidth version (GHz) 60-87 75-106 --- ---  
Bandwidth: 60% bandwidth version (GHz center) 18 21 30 36
Selectable center frequency range: 60% bandwidth version (GHz) 69-78 85.5-95.5 105-120 128-146  
Insertion loss (dB) (max) 1 1 1.2 1.2  
VSWR (max) H-Arm ports 1.5:1 1.5:1 1.5:1 1.5:1  
E-Arm ports 1.6:1 1.6:1 1.6:1 1.6:1  
Isolation (min) E- to H- arms 30 30 30 30  
Co-linear arms 20 20 20 20  
Balance (± dB) (max) 0.5 0.5 0.5 0.5  

1) Percentage bandwidth denotes percent of full waveguide bandwidth.

The series CSS short slot hybrid coupler covers 26.5 to 170 GHz in nine waveguide bands. The two output ports are in-line to the input port, and have 90° phase difference with nearly equal power levels over 5% of the center frequency. Isolation between output ports is 20 dB (typical).

This document link requires Adobe ReaderClick Here to download the CSS product datasheet

Electrical Specifications

Model Number (Note 1) Center Freq GHz (Note 2) BW Insertion Loss
(Note 3)
Isolation Weight g (Brass) (Note 1) Weight g (Alum) (Note 1)
CSS-42-S024B0 24 5% 0.5 20 500 200
CSS-28-S029B0 29 0.5 20 370 150
CSS-28-S035B0 35 0.5 20 370 150
CSS-22-R040B0* 40 0.5 20 500 200
CSS-19-R046B0* 46 0.5 20 500 200
CSS-15-R060B0 60 0.8 20 200 80
CSS-12-R077B0 77 1 20 200 80
CSS-10-R094B0 94 1 20 200 80
CSS-06-R144B0 140 1.5 18 200 80

1) For ~ 60% lighter weight, change “B” to “A” for Aluminum
2) Other frequencies available, please consult Millitech Sales
3) Insertion loss above 3dB power split with 90° relative phase

* Special Square Flange available, please consult Millitech Sales.
Phase accuracy: ±5° at center frequency; ±10° flatness across frequency

The series FXA general purpose fixed attenuator consists of a waveguide section with a precisely cut resistive vane. It is available in nine waveguide bands from 18 to 170 GHz. The precision fixed attenuators are made using a rugged split block design. This attenuator can be used as a laboratory standard against which other instruments or components are calibrated

This document link requires Adobe ReaderClick Here to download the FXA product datasheet

Electrical Specifications

Model (Notes 1,2) FXA-42 FXA-28 FXA-22 FXA-19 FXA-15
Frequency band and range (GHz) K
18-26.5
Ka
26.5-40
Q
33-50
U
40-60
V
50-75
VSWR (max) 1.15:1 1.15:1 1.15:1 1.15:1 1.15:1
Power rating (W) (max) 0.5 0.5 0.5 0.5 0.3
 
Model (Notes 1,2) FXA-12 FXA-10 FXA-08 FXA-06  
Frequency band and range (GHz) E
60-90
W
75-110
F
90-140
D
110-170
 
VSWR (max) 1.15:1 1.15:1 1.20:1 1.5:1  
Power rating (W) (max) 0.3 0.3 0.3 0.3  

1) Specify attenuation level when ordering (40 dB max).
2) High power versions available. Please consult Millitech for details.

The series LSA level set attenuator consists of a waveguide section with a precisely cut resistive vane. The attenuator is available in nine waveguide bands from 18 to 170 GHz

This document link requires Adobe ReaderClick Here to download the LSA product datasheet

Electrical Specifications

Model (Notes 1,2) LSA-42 LSA-28 LSA-22 LSA-19 LSA-15
Frequency band and range (GHz) K
18-26.5
Ka
26.5-40
Q
33-50
U
40-60
V
50-75
Insertion loss (dB) (max) 0.5 0.5 0.5 0.7 0.7
Power rating (W) (max) 0.5 0.5 0.5 0.3 0.3
 
Model (Notes 1,2) LSA-12 LSA-10 LSA-08 LSA-06  
Frequency band and range (GHz) E
60-90
W
75-110
F
90-140
D
110-170
 
Insertion loss (dB) (max) 1 1 1.2 1.2  
Power rating (W) (max) 0.3 0.3 0.3 0.3  

1) Attenuation 25dB min. at max. setting
2) VSWR 1.3:1 (max) on all versions.

The series VPS variable phase shifter consists of a waveguide section with a movable dielectric vane driven by a micrometer. This arrangement provides a phase shift range of 180°.

This document link requires Adobe ReaderClick Here to download the VPS product datasheet

Electrical Specifications

Model (Notes 1,2) VPS-42 VPS-28 VPS-22 VPS-19 VPS-15
Frequency band and range (GHz) K
18-26.5
Ka2
6.5-40
Q
33-50
U
40-60
V
50-75
Insertion loss (dB) (max) --- 0.5 0.5 0.7 0.7
Power rating (W) (max) --- 0.5 0.5 0.5 0.5
 
Model (Notes 1,2) VPS-12 VPS-10 VPS-08 VPS-06  
Frequency band and range (GHz) E
60-90
W
75-110
F
90-140
D
110-170
 
Insertion loss (dB) (max) 1 1 1.2 1.2  
Power rating (W) (max) 0.5 0.5 0.5 0.5  

1) VSWR 1.3:1 (max) on all versions.
2) Phase shift range is 0-180 degrees with measurements made at the lowest frequency of the waveguide band.

Millitech will engineer custom variations of our standard MMW components, as well as, multi-component assemblies and solutions, with minimal non-recurring engineering (NRE) costs, to meet your specific requirements. Typically these modification are to meet one or more of the following requirements:

  • Tuned for specific performance characteristics
  • Extended operational temperatures
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  • ITAR compliant

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