QDC Broadband Waveguide Directional Couplers

ISO 9001:2000

CERTIFIED

Products

App Notes

New!

Contact

Home

Employment

Search

Request Catalog

Request Quote

QDC Series Broadband Waveguide Directional Couplers

Characteristics

Broadband

Low VSWR

High Directivity

Minimum Coupling Variation with Frequency

Product Description

QuinStar products QDC series broadband directional couplers* are multi-hole waveguide couplers. The QDC series couplers are offered in 7 waveguide sizes from 18.0 to 110 GHz. Nominal coupling of 10 dB, 20 dB, 30 dB, and 40 dB are offered as standard products. Two different mechanical configurations or outlines are offered for these waveguide couplers - one with E-plane bend and the other with H-plane bend in the coupled port to suit the physical layout of all applications or test set requirements.

QuinStar also offers Series QJG and QJR Precision Directional Couplers in rectangular block geometry.

Specifications

WAVEGUIDE BAND	K	Ka	Q	U	V	E	W
Frequency Range (GHz)	18-26.5	26.5-40	33-50	40-60	50-75	60-90	75-110
Coupling (dB)	10, 20, 30, 40**
Coupling Variation (dB)	± 0.6	± 0.6	± 0.6	± 0.8	± 1.0	± 1.0	± 1.0
Coupling Accuracy (dB)	± 1.0	± 1.0	± 1.0	± 1.2	± 1.5	± 1.5	± 1.5
Directivity (dB) Typical	35	35	35	35	35	35	30
Main Line VSWR (Typ)	1.05	1.05	1.05	1.10	1.10	1.10	1.10
Coupled Line VSWR (Typ)	1.12	1.12	1.12	1.15	1.15	1.15	1.17

Notes:
*As of Oct. 7, 2004 these couplers will be corrosion protected with a chem-film and external surfaces will be black-painted.
**For coupling values of 3 and 6 dB see the QJG series and QJR series couplers.

Outline Drawings / Mechanical Specifications

FREQUENCY BAND AND COUPLING LEVEL (dB)	OUTLINE DIMENSIONS, inches/mm
FREQUENCY BAND AND COUPLING LEVEL (dB)	A	B	C	D
K 10, 20, 30, 40	11.50/292.0	2.00/50.8	1.50/38.1	.25/6.35
Ka 10, 20, 30, 40	9.62/244.0	1.75/44.5	1.38/35.1	.16/4.06
Q 10, 20, 30, 40	8.40/213.0	1.64/41.7	1.30/33.0	.13/3.30
U 10, 20, 30, 40	7.38/187.4	1.38/35.1	1.12/28.5	.11/2.80
V 10, 20, 30, 40	6.25/159.0	1.13/28.7	0.88/22.4	.08/2.03
E 10, 20, 30, 40	5.50/140.0	1.13/28.7	0.88/22.4	.07/1.78
W 10, 20, 30, 40	4.50/114.0	1.00/25.4	0.81/20.6	.06/1.52

Ordering Information

Model Number: QDC - A B CD 00 (Click here for automatic web quote request form)

Coupled Port Configuration:

	E	=	E-plane bend on coupled port
	H	=	H-plane bend on coupled port

Waveguide band designator:

K	=	K-band
A	=	Ka-band
Q	=	Q-band
U	=	U-band
V	=	V-band
E	=	E-band
W	=	W-band

Coupling level in dB

Also available:
	Precision General Purpose Couplers (QJG Series)	Matched Hybrid Tees (QJH Series)
	Precision High Directivity Couplers (QJR Series)	E and H Plane Waveguide Tees (QUH Series)
	Bidirectional and Dual-directional Waveguide Couplers (QBC Series)	Short Slot Hybrid Power Divider (QSP Series)
	General Purpose Crossguide Couplers (QJX Series)	Single and Triple Ring Hybrid Power Divider (QHR Series)
	Precision Crossguide Couplers (QJC Series)	Multi-Output Power Divider (QMD Series)
	Precision Bi-directional and Dual-directional Waveguide Couplers (QJB/QJD Series)
	Master List of All Products	Catalog Request