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Crossguide Directional Couplers

Name: Crossguide Directional Couplers
Brand: DOLPH MICROWAVE
Price: 1 USD

Crossguide directional couplers are specialized microwave components designed for signal sampling or injection across a broad frequency range. They excel in applications requiring minimal interference with the main signal path, offering precise coupling, high directivity, and low VSWR, making them ideal for power monitoring, signal distribution, and feedback systems.

Compact Waveguide Signal Sampling

Dolph Microwave crossguide directional couplers provide controlled signal sampling or injection in WR430 through WR28 rectangular waveguide systems. Published configurations include four waveguide ports, three waveguide ports, and two waveguide ports with one coaxial sampling port.

Standard nominal coupling values are 20, 30, 40, 50 and 60 dB. The published model tables cover an 18–60 dB coupling range, 18 dB minimum directivity, 10–20% typical operating bandwidth, aluminum or copper construction and multiple IEC/EIA flange arrangements. Non-standard port layouts and coupling requirements are available subject to engineering review.

WR430–WR28 20 / 30 / 40 / 50 / 60 dB 18 dB Min. Directivity 3 Port Styles

Crossguide Coupler Overview

Compact directional sampling where installation space matters

A crossguide directional coupler places a secondary coupling structure across the main rectangular waveguide. A controlled portion of travelling RF energy is directed to a secondary waveguide or coaxial port for monitoring, measurement, feedback or signal injection while the principal signal continues through the main line.

The published specification is intended for applications where compactness is important and 18 dB minimum directivity is suitable for the measurement task. For other coupling structures, review the complete waveguide coupler range.

Discuss Your Band and Port Layout → Download Specification Sheet ↗

Main LineInput → Through

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INPUT THROUGH COUPLED PORT

10–20%Typical operating bandwidth

±0.7 dBNominal coupling accuracy

Published Electrical Range

Performance values for initial selection

011.72–40 GHzPublished frequency coverage

Fifteen waveguide bands from WR430 through WR28.

0218–60 dBSpecification-table coupling range

Standard nominal values are 20, 30, 40, 50 and 60 dB.

0318 dB Min.Directivity

Separates the desired travelling-wave sample from the opposite direction.

041.10 / 1.15Main-line VSWR maximum

Most listed models are 1.10; WR28 models are listed at 1.15.

05±1 dBFrequency sensitivity

Published for the specified operating bandwidth.

Operating bandwidth is not the complete waveguide band

The specification lists a typical operating bandwidth of 10–20%, with up to 20% of the applicable waveguide bandwidth. Include exact start and stop frequencies in the request.

Power and environmental ratings require confirmation

The standard sheet does not publish CW power, peak power, duty cycle, pressure sealing, temperature range or environmental qualification. Provide these conditions for engineering review and written confirmation.

Dimensions depend on selected interfaces

Overall length and port orientation vary with waveguide size, flange selection and coupled-port style. Use the approved drawing for mechanical integration.

Port Configuration Styles

Select the coupling interface that fits the assembly

View flange designation guide ↗

STYLE 1

Four Waveguide Ports

A four-port all-waveguide arrangement with two main-line ports and two secondary-line waveguide ports. The specification uses the DH-xxW+C… model family.

Main VSWR 1.10–1.15Secondary VSWR 1.15

STYLE 2

Three Waveguide Ports

An all-waveguide arrangement with two main-line ports and one secondary waveguide port. The specification uses the DH-xxWL+C… model family.

Main VSWR 1.10–1.15Secondary VSWR 1.15

STYLE 3

Two Waveguide Ports + One Coax Port

Two main-line waveguide ports with a compact coaxial sampling output. Published table options use Type-N in lower bands and SMA in higher bands; other connector codes remain subject to frequency and layout review.

Main VSWR 1.10–1.15Secondary VSWR 1.25–1.50

Complete Specification Tables

Model coverage by port configuration

Each table retains frequency, bandwidth, VSWR, coupling, directivity, waveguide, flange, connector and material details. Scroll horizontally on smaller screens.

Style 1 — Four Waveguide Ports DH-xxW+C… | Main-line and secondary-line waveguide ports ⌄

Model No.	Freq. Range (GHz)	Operating BW (%)	Main VSWR Max.	Secondary VSWR Max.	Coupling (dB)	Directivity Min. (dB)	IEC WG	EIA WG	Flange	Material
DH-22W+C…	1.72–2.61	10–20	1.10	1.15	18–60	18	R22	WR430	FDP / FDM	Al / Cu
DH-26W+C…	2.17–3.30	10–20	1.10	1.15	18–60	18	R26	WR340	FDP / FDM	Al / Cu
DH-32W+C…	2.60–3.95	10–20	1.10	1.15	18–60	18	R32	WR284	FDP / FDM	Al / Cu
DH-40W+C…	3.22–4.90	10–20	1.10	1.15	18–60	18	R40	WR229	FDP / FDM	Al / Cu
DH-48W+C…	3.94–5.99	10–20	1.10	1.15	18–60	18	R48	WR187	FDP / FDM	Al / Cu
DH-58W+C…	4.64–7.05	10–20	1.10	1.15	18–60	18	R58	WR159	FDP / FDM	Al / Cu
DH-70W+C…	5.38–8.17	10–20	1.10	1.15	18–60	18	R70	WR137	FDP / FDM	Al / Cu
DH-84W+C…	6.57–9.99	10–20	1.10	1.15	18–60	18	R84	WR112	FBP / FBM / FBE	Al / Cu
DH-100W+C…	8.20–12.40	10–20	1.10	1.15	18–60	18	R100	WR90	FBP / FBM / FBE	Al / Cu
DH-120W+C…	9.84–15.0	10–20	1.10	1.15	18–60	18	R120	WR75	FBP / FBM / FBE	Al / Cu
DH-140W+C…	11.9–18.0	10–20	1.10	1.15	18–60	18	R140	WR62	FBP / FBM / FBE	Al / Cu
DH-180W+C…	14.5–22.0	10–20	1.10	1.15	18–60	18	R180	WR51	FBP / FBM / FBE	Al / Cu
DH-220W+C…	17.6–26.7	10–20	1.10	1.15	18–60	18	R220	WR42	FBP / FBM / FBE	Al / Cu
DH-260W+C…	21.7–33.0	10–20	1.10	1.15	18–60	18	R260	WR34	FBP / FBM / FBE	Al / Cu
DH-320W+C…	26.3–40.0	10–20	1.15	1.15	18–60	18	R320	WR28	FBP / FBM / FBE	Al / Cu

Style 2 — Three Waveguide Ports DH-xxWL+C… | Two main-line ports and one waveguide coupling port ⌄

Model No.	Freq. Range (GHz)	Operating BW (%)	Main VSWR Max.	Secondary VSWR Max.	Coupling (dB)	Directivity Min. (dB)	IEC WG	EIA WG	Flange	Material
DH-22WL+C…	1.72–2.61	10–20	1.10	1.15	18–60	18	R22	WR430	FDP / FDM	Al / Cu
DH-26WL+C…	2.17–3.30	10–20	1.10	1.15	18–60	18	R26	WR340	FDP / FDM	Al / Cu
DH-32WL+C…	2.60–3.95	10–20	1.10	1.15	18–60	18	R32	WR284	FDP / FDM	Al / Cu
DH-40WL+C…	3.22–4.90	10–20	1.10	1.15	18–60	18	R40	WR229	FDP / FDM	Al / Cu
DH-48WL+C…	3.94–5.99	10–20	1.10	1.15	18–60	18	R48	WR187	FDP / FDM	Al / Cu
DH-58WL+C…	4.64–7.05	10–20	1.10	1.15	18–60	18	R58	WR159	FDP / FDM	Al / Cu
DH-70WL+C…	5.38–8.17	10–20	1.10	1.15	18–60	18	R70	WR137	FDP / FDM	Al / Cu
DH-84WL+C…	6.57–9.99	10–20	1.10	1.15	18–60	18	R84	WR112	FBP / FBM / FBE	Al / Cu
DH-100WL+C…	8.20–12.40	10–20	1.10	1.15	18–60	18	R100	WR90	FBP / FBM / FBE	Al / Cu
DH-120WL+C…	9.84–15.0	10–20	1.10	1.15	18–60	18	R120	WR75	FBP / FBM / FBE	Al / Cu
DH-140WL+C…	11.9–18.0	10–20	1.10	1.15	18–60	18	R140	WR62	FBP / FBM / FBE	Al / Cu
DH-180WL+C…	14.5–22.0	10–20	1.10	1.15	18–60	18	R180	WR51	FBP / FBM / FBE	Al / Cu
DH-220WL+C…	17.6–26.7	10–20	1.10	1.15	18–60	18	R220	WR42	FBP / FBM / FBE	Al / Cu
DH-260WL+C…	21.7–33.0	10–20	1.10	1.15	18–60	18	R260	WR34	FBP / FBM / FBE	Al / Cu
DH-320WL+C…	26.3–40.0	10–20	1.15	1.15	18–60	18	R320	WR28	FBP / FBM / FBE	Al / Cu

Style 3 — Two Waveguide Ports + One Coax Port DH-xxWL+C… | Compact coaxial sampled output ⌄

Model No.	Freq. Range (GHz)	Operating BW (%)	Main VSWR Max.	Secondary VSWR Max.	Coupling (dB)	Directivity Min. (dB)	IEC WG	EIA WG	Flange	Coupled Connector	Material
DH-22WL+C…	1.72–2.61	10–20	1.10	1.25–1.50	18–60	18	R22	WR430	FDP / FDM	Type-N	Al / Cu
DH-26WL+C…	2.17–3.30	10–20	1.10	1.25–1.50	18–60	18	R26	WR340	FDP / FDM	Type-N	Al / Cu
DH-32WL+C…	2.60–3.95	10–20	1.10	1.25–1.50	18–60	18	R32	WR284	FDP / FDM	Type-N	Al / Cu
DH-40WL+C…	3.22–4.90	10–20	1.10	1.25–1.50	18–60	18	R40	WR229	FDP / FDM	Type-N	Al / Cu
DH-48WL+C…	3.94–5.99	10–20	1.10	1.25–1.50	18–60	18	R48	WR187	FDP / FDM	Type-N	Al / Cu
DH-58WL+C…	4.64–7.05	10–20	1.10	1.25–1.50	18–60	18	R58	WR159	FDP / FDM	Type-N	Al / Cu
DH-70WL+C…	5.38–8.17	10–20	1.10	1.25–1.50	18–60	18	R70	WR137	FDP / FDM	Type-N	Al / Cu
DH-84WL+C…	6.57–9.99	10–20	1.10	1.25–1.50	18–60	18	R84	WR112	FBP / FBM / FBE	SMA	Al / Cu
DH-100WL+C…	8.20–12.40	10–20	1.10	1.25–1.50	18–60	18	R100	WR90	FBP / FBM / FBE	SMA	Al / Cu
DH-120WL+C…	9.84–15.0	10–20	1.10	1.25–1.50	18–60	18	R120	WR75	FBP / FBM / FBE	SMA	Al / Cu
DH-140WL+C…	11.9–18.0	10–20	1.10	1.25–1.50	18–60	18	R140	WR62	FBP / FBM / FBE	SMA	Al / Cu
DH-180WL+C…	14.5–22.0	10–20	1.10	1.25–1.50	18–60	18	R180	WR51	FBP / FBM / FBE	SMA	Al / Cu
DH-220WL+C…	17.6–26.7	10–20	1.10	1.25–1.50	18–60	18	R220	WR42	FBP / FBM / FBE	SMA	Al / Cu
DH-260WL+C…	21.7–33.0	10–20	1.10	1.25–1.50	18–60	18	R260	WR34	FBP / FBM / FBE	SMA	Al / Cu
DH-320WL+C…	26.3–40.0	10–20	1.15	1.25–1.50	18–60	18	R320	WR28	FBP / FBM / FBE	SMA	Al / Cu

Ordering Code

Build the required part number

Example

DH100WL+C30NKPMA

The complete code identifies waveguide size, directional configuration, coupling value, connector, connector interface, flange arrangement and material.

100Waveguide size code | WR90

WL+CUni-directional crossguide coupler

WL+2CBi-directional crossguide coupler

30Forward or reverse coupling | 30 dB

NType-N coupled connector

KFemale connector interface

PRectangular flat flange

MRectangular grooved flange

A / CAluminum / Copper material

Manufacturing and Documentation

Confirm the build against the approved configuration

Material

Published options are aluminum and copper. The exact material should be confirmed in the part number, quotation and drawing.

Finish

The specification lists corrosion protection with a black top coat. Other finishes or paint colors may be reviewed upon request.

Mechanical approval

Overall dimensions and port orientation vary by waveguide, flange and coupled-port configuration. Use the approved drawing for integration.

Application review

Provide power, duty cycle, mismatch, environmental conditions, labeling and documentation requirements before final confirmation.

Frequently Asked Questions

Crossguide coupler selection questions

What frequency and waveguide sizes are covered?⌄

The current specification covers 1.72–40 GHz across IEC R22–R320 and EIA WR430–WR28. The exact operating window for a selected coupler is typically 10–20% of the applicable waveguide bandwidth.

Which coupling values are standard?⌄

Standard nominal values are 20, 30, 40, 50 and 60 dB. The model tables state an 18–60 dB coupling range, nominal accuracy of ±0.7 dB and frequency sensitivity of ±1 dB.

Can the coupled output be waveguide or coaxial?⌄

Yes. Published styles include all-waveguide arrangements with three or four waveguide ports and a two-waveguide-port configuration with one coaxial coupled output.

Are all connector families available at every frequency?⌄

No. Connector availability depends on frequency, coupling level and mechanical layout. The standard coaxial-output table uses Type-N in lower bands and SMA in higher bands.

Is power handling included in the standard table?⌄

No published CW or peak power rating is shown. Include power, duty cycle, load mismatch and environmental conditions in the request for review.

Can a non-standard port layout be reviewed?⌄

Yes. Special multi-port crossguide couplers can be reviewed for project-specific requirements. Provide a drawing, interface list or dimensional envelope.

What finish is supplied?⌄

The specification lists corrosion protection plus a black top coat. Other finishes or paint colors may be reviewed upon request.

What should be approved before production?⌄

Confirm operating band, coupling and direction, port configuration, flange and connector designations, material, finish, power conditions, mechanical envelope, labeling and documentation in the quotation and approved drawing.

Engineering Review

Send the frequency band, coupling and port drawing

Dolph Microwave can review a standard model or project-specific crossguide layout and confirm the electrical, mechanical and finish details in the quotation and drawing.

Contact Sales Engineering →Open Specification PDF ↗