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Waveguide Flange Shim

Name: Waveguide Flange Shim
Brand: DOLPH MICROWAVE
Price: 1 USD

Waveguide flange shims are precision components used to ensure proper alignment and sealing between waveguide sections in microwave systems. These thin metal spacers adjust the mating surfaces for optimal connection, enhancing system performance by preventing air gaps and ensuring efficient signal transmission across various applications.

Precision aluminum and copper spacers for controlled waveguide flange spacing, alignment and interface adjustment across 0.32–112 GHz. Published configurations cover 1–50 mm thicknesses with model-dependent cover, grooved and other flange interfaces. Custom thickness, material, finish and sealing requirements can be reviewed against the mating-flange drawing.

Published Product Scope

A configurable interface component for standard rectangular waveguide systems

A waveguide flange shim is installed between compatible mating interfaces when a defined mechanical spacing or flange adjustment is required. The selected part must match the waveguide aperture, flange family, bolt or alignment arrangement, material and finished thickness specified by the assembly drawing.

0.32–112 Published frequency range GHz

WR2300–WR10 Waveguide range

1–50 mm Published thickness range

Al / Cu Model-dependent materials

Define the sealing function separately

A shim can support the required spacing and mating geometry, but the shim alone does not establish a pressure rating, moisture seal or RF seal. A sealed assembly requires a compatible flange pair, the specified gasket or O-ring, controlled compression and an agreed leakage or pressure acceptance method.

Mechanical spacing Specify the finished shim thickness and any dimensional tolerance controlled by the assembly drawing.

Pressure-only sealing Select a compatible non-conductive gasket or O-ring when the approved design requires pressure sealing only.

Pressure and RF sealing A conductive gasket may be required where the joint must provide both environmental sealing and electrical continuity.

View waveguide gaskets and O-rings

Selection Workflow

Confirm the complete interface—not only the WR size

The WR designation identifies the nominal waveguide size, but it does not fully define the flange face, groove, hole pattern, alignment arrangement or required sealing system.

Operating band

Provide the complete minimum-to-maximum operating frequency, not only the center frequency.

Waveguide size

Confirm the applicable WR and IEC/R designation shown in the project documentation.

Flange designation

State the complete cover, grooved, choke, CPR, PBR, UBR, UDR, UG or project-specific code.

Thickness and material

Define finished thickness, tolerance and the required aluminum or copper configuration.

Drawing and acceptance

Approve the mating-interface drawing and agree any dimensional, RF, pressure or documentation requirements.

Interface Compatibility

Cover, grooved and choke interfaces require different mating details

Dolph publishes IEC and EIA flange designation references across the standard rectangular waveguide range. Use the exact flange code and mating drawing when selecting a shim; similarly named flanges are not automatically interchangeable.

Review EIA and IEC flange references

Cover / flat interface

Confirm the aperture, outer dimensions, hole pattern, alignment features and the compatible mating face.

Grooved interface

Confirm groove dimensions and the specified gasket or O-ring. A groove alone does not define pressure capability.

Choke or special interface

Use the controlled interface drawing to verify choke geometry, orientation and the approved mating configuration.

Engineering and Manufacturing

Interface details can be reviewed alongside the wider waveguide assembly

Dolph Microwave states that it was founded in 2001 and manufactures microwave components and antenna feed systems. Published manufacturing capabilities include CNC machining, turning, waveguide forming and bending, soldering and brazing of copper, copper alloys and aluminum, plating, passivation and assembly.

Mechanical processing CNC milling and turning, waveguide forming and bending, abrasive machining and diamond grinding are listed by the company.

Joining and finishing Published capabilities include soldering and brazing, electrolytic and electroless plating, anodising and passivation.

Measurement capabilities The support page lists RF vector and scalar systems up to 100 GHz, waveguide calibration, EMI/EMS and environmental testing capabilities.

Quality management scope The published ISO 9001:2015 certificate identifies waveguide component design, manufacture and sale within its certified scope.

Manufacturing capabilities Testing and support Company and certificate

For models operating above 100 GHz, confirm the applicable measurement method, test range and deliverable documentation before ordering. The validity date printed on the currently published ISO certificate is August 7, 2026; verify the current certificate status when certification evidence is required.

Complete Published Range

Waveguide flange shim model table

The table retains the model, frequency range, waveguide size, published VSWR, flange designation, thickness, material, finish and document fields shown in the current product data.

Swipe horizontally on mobile

View all 29 published model rows

Model	Frequency (GHz)	WG Size	VSWR	Flange Type / Designation		Thickness (mm)	Material	Finish	Files
Model	Frequency (GHz)	WG Size	VSWR	Cover	Grooved	Thickness (mm)	Material	Finish	Files
DH-3WG…	0.32–0.49	WR2300	1.05:1	UDR3	PDR3	1–50	Al	Chromate	PDFSTEP
DH-4WG…	0.35–0.53	WR2100	1.05:1	UDR4	PDR4	1–50	Al	Chromate	PDFSTEP
DH-5WG…	0.41–0.62	WR1800	1.05:1	UDR5	PDR5	1–50	Al	Chromate	PDFSTEP
DH-6WG…	0.49–0.75	WR1500	1.05:1	UDR6	PDR6	1–50	Al	Chromate	PDFSTEP
DH-8WG…	0.64–0.98	WR1150	1.05:1	UDR8	PDR8	1–50	Al	Chromate	PDFSTEP
DH-9WG…	0.76–1.15	WR975	1.05:1	UDR9	PDR9	1–50	Al	Chromate	PDFSTEP
DH-12WG…	0.96–1.46	WR770	1.05:1	UDR12	PDR12	1–50	Al	Chromate	PDFSTEP
DH-14WG…	1.13–1.73	WR650	1.05:1	UDR14	PDR14	1–50	Al	Chromate	PDFSTEP
DH-18WG…	1.45–2.2	WR510	1.05:1	UDR18	PDR18	1–50	Al	Chromate	PDFSTEP
DH-22WG…	1.72–2.61	WR430	1.05:1	UDR22	PDR22	1–50	Al/Cu	Chromate	PDFSTEP
DH-26WG…	2.17–3.3	WR340	1.05:1	UDR26	PDR26	1–50	Al/Cu	Chromate	PDFSTEP
DH-32WG…	2.6–3.95	WR284	1.05:1	UDR32	PDR32	1–50	Al/Cu	Chromate	PDFSTEP
DH-40WG…	3.22–4.9	WR229	1.05:1	UDR40	PDR40	1–50	Al/Cu	Chromate	PDFSTEP
DH-48WG…	3.94–5.99	WR187	1.05:1	UDR48	PDR348	1–50	Al/Cu	Chromate	PDFSTEP
DH-58WG…	4.64–7.05	WR159	1.05:1	UDR58	PDR58	1–50	Al/Cu	Chromate	PDFSTEP
DH-70WG…	5.38–8.17	WR137	1.05:1	UDR70	PDR70	1–50	Al/Cu	Chromate	PDFSTEP
DH-84WG…	6.57–9.99	WR112	1.05:1	UDR84/UBR84	PDR84/PBR84	1–50	Al/Cu	Chromate	PDFSTEP
DH-100WG…	8.2–12.5	WR90	1.05:1	UDR100/UBR100	PDR100/PBR100	1–50	Al/Cu	Chromate	PDFSTEP
DH-120WG…	9.84–15	WR75	1.05:1	UBR120	PBR120	1–50	Al/Cu	Chromate	PDFSTEP
DH-140WG…	11.9–18	WR62	1.05:1	UBR140	PBR140	1–50	Al/Cu	Chromate	PDFSTEP
DH-180WG…	14.5–22	WR51	1.05:1	UBR180	PBR180	1–50	Al/Cu	Chromate	PDFSTEP
DH-220WG…	17.6–26.7	WR42	1.05:1	UBR220	PBR220	1–50	Al/Cu	Chromate	PDFSTEP
DH-260WG…	21.7–33	WR34	1.05:1	UBR260	PBR260	1–50	Al/Cu	Chromate	PDFSTEP
DH-320WG…	26.3–40	WR28	1.05:1	UBR320	PBR320	1–50	Al/Cu	Chromate	PDFSTEP
DH-400WG…	32.9–50.1	WR22	1.05:1	FUGP400/UG-383U/M		1–50	Cu	Chromate	PDFSTEP
DH-500WG…	39.2–59.6	WR19	1.05:1	FUGP500/UG-383U/M		1–50	Cu	Chromate	PDFSTEP
DH-620WG…	49.8–75.8	WR15	1.05:1	FUGP620/UG-385U/M		1–50	Cu	Chromate	PDFSTEP
DH-740WG…	60.5–91.9	WR12	1.05:1	FUGP740/UG-387U/M		1–50	Cu	Chromate	PDFSTEP
DH-900WG…	73.8–112	WR10	1.05:1	FUGP900/UG-387U/M		1–50	Cu	Chromate	PDFSTEP

Model and flange codes above reproduce the current product table, including the published “PDR348” entry for DH-48WG. Confirm the final model code, flange designation and approved drawing with Dolph Microwave before production or replacement procurement. STEP availability should also be confirmed for the selected model.

Ordering Reference

Published part-number guide

The current product page gives the following ordering example. Use it as a reference and confirm the final code in the quotation or approved drawing.

DH- 100 WG 10 P M A

100Waveguide size: WR90

WGWaveguide type: Straight Waveguide

10Thickness: 10 mm, or customer-specified thickness

PFlange type: Flat

MFlange type: Grooved

A/CMaterial: Aluminium / Cu

Published surface treatment

The product note states that Dolph-MW models include Surtec/corrosion-protection treatment and flat-black paint. Flanges are described as unplated, polished and Surtec-treated.

Alternative finishes

Other finishes and paint colors are stated as available on request. Define the required finish in the RFQ rather than assuming the catalog finish will apply to a custom build.

Drawing-controlled supply

For replacement, integration or non-standard applications, use the approved drawing to control thickness, aperture, holes, groove geometry, material, finish and inspection requirements.

Quotation Checklist

Information to include with your enquiry

A complete technical package helps the sales and engineering teams assess compatibility without relying on assumptions.

Frequency and WR sizeComplete operating band and applicable WR / IEC designation.

Mating flange detailsExact flange codes, photographs and dimensioned interface drawing.

Shim thicknessNominal finished thickness and required tolerance.

Material and finishAluminum or copper requirement and any controlled coating or paint.

Sealing requirementNo seal, pressure-only seal, or combined pressure and RF seal.

Environment and quantityTemperature, humidity, pressure or gas conditions, quantity and schedule.

Acceptance documentsInspection record, dimensional report, RF data, material record or STEP file requirements.

Existing part referenceCurrent model, nameplate, previous drawing or mating-equipment reference.

Related Waveguide Components

These related product families can be reviewed when the requirement involves a complete waveguide joint, replacement section, sealing arrangement or flange standard.

Straight Waveguide Sections

Review complete straight sections when the required spacing cannot be addressed by a flange shim alone.

Sealing component

Waveguide Gasket and O-Ring

Select conductive or non-conductive sealing materials according to the specified pressure and RF function.

Interface reference

Waveguide Flange Standard EIA & IEC

Compare published flange families and designation codes before confirming the mating interface.

Raw waveguide

Waveguide Tube

Review raw rectangular waveguide tubing for cut-length supply or a drawing-controlled fabricated assembly.

Quick-release connectors & dust covers Customized microwave products Browse standard waveguide products

Technical Reading

Flange selection and assembly references

Review these supporting guides when identifying an existing flange, selecting a gasket or preparing the installation procedure.

Flange guide Waveguide Flange Size Guide Review EIA and IEC naming, bolt-hole arrangements and gasket-fit considerations. Gasket selection How to Choose a Waveguide Gasket or O-Ring Identify the waveguide size, flange type and pressure or RF sealing function. Interface compatibility Compatibility, Assembly and Signal Integrity Check the aperture, flange geometry, sealing face, alignment and contact force as one interface. Installation reference Waveguide Installation Guide Review flange preparation, alignment, fastening and post-assembly verification considerations.

Technical documents

Use the published product sheet for preliminary selection and the flange reference for designation comparison. The approved quotation and drawing should control the final supply.

Waveguide Flange Shim Model table and part-number reference · PDF Flange Type Designations IEC and EIA designation reference · PDF

Published Warranty

One year from the date of delivery

Dolph Microwave states that its products are warranted against defective material and workmanship for one year from delivery. Defective parts and repair work required by normal use are covered within that period, subject to the published warranty wording and applicable commercial terms.

Confirm your required interface

Send the operating band, WR size, mating flange drawing, thickness, material, finish, sealing function, quantity and required documentation for technical review.

Contact Dolph Microwave