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Waveguide Bulkhead Feedthrus

Waveguide Bulkhead Feedthrus

Rectangular waveguide bulkhead feedthroughs for individual bands from 2.6 to 40 GHz, WR284–WR28. Match wall thickness, both flanges, sealing conditions and the model drawing.

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Dolph Microwave rectangular waveguide bulkhead feedthru with mounting flanges and sealing components

Rectangular Waveguide Model Range

2.6–40 GHz Frequency coverage
WR284–WR28 Rectangular waveguide
1.05:1 VSWR listed for every model
UDR / UBR / PDR / PBR Published flange designations

Construction Details

Sealing If sealing is required, specify the gasket material, pressure medium, differential pressure and acceptance criteria for engineering review.
Hardware Stainless-steel hardware and backing rings are included in the catalog construction details. Confirm the supplied hardware set and panel clamping arrangement on the assembly drawing.
Standard Material Aluminum is the catalog base material. MIL-C-5541E identifies a chemical conversion-coating specification, not an aluminum alloy grade. Specify the alloy and finish separately on the order drawing.[1]
Optional Material Silver-plated brass is a catalog option. QQ-S-365D is a canceled plating specification; agree the applicable specification, revision and coating thickness before ordering. DLA lists ASTM B700 as a possible replacement requiring application review.[2]
Body Finish The catalog body finish is corrosion-protection treatment with flat-black paint. Specify any different coating or color with the base material.
Flange Finish The catalog flange finish is unplated, polished and conversion-treated. A silver-plated brass option requires a separate finish callout; confirm which surfaces are coated, plated or masked.

Need a Fast Model Check?

Send the data that controls fit and sealing. A drawing is helpful, but it is not required to start a review.

Frequency range
WR size
Flanges on both sides
Wall / panel thickness
Pressure / leak requirement
Quantity / drawing

Model Specifications

Each row is a separate model family. Match the operating band, WR size, both flange interfaces and dimensions A–D to the assembly drawing. The 2.6–40 GHz span is coverage across the family, not the bandwidth of one part. Scroll horizontally on smaller screens.

MODEL FREQ. RANGE (GHz) WG SIZE VSWR FLANGES TYPE DIMENSIONS (mm) MATERIAL DATASHEET
COVER GROOVED A B C D
DH-32BFU…2.6-3.95WR2841.05:1UDR32PDR3210841.4165.1184AlDWG / STEP on request
DH-40BFU…3.22-4.9WR2291.05:1UDR40PDR4010841.4152.4171AlDWG / STEP on request
DH-48BFU…3.94-5.99WR1871.05:1UDR48PDR4810841.4133.35152.4AlDWG / STEP on request
DH-58BFU…4.64-7.05WR1591.05:1UDR58PDR5810841.4133.35152.4AlDWG / STEP on request
DH-70BFU…5.38-8.17WR1371.05:1UDR70PDR7010841.4101.6121AlDWG / STEP on request
DH-84BFU…6.57-9.99WR1121.05:1UDR84/UBR84PDR84/PBR8410841.482.6101.6AlDWG / STEP on request
DH-100BFU…8.2-12.5WR901.05:1UDR100/UBR100PDR100/PBR10095.335.173.288.9AlDWG / STEP on request
DH-120BFU…9.84-15WR751.05:1UBR120PBR12095.335.173.288.9AlDWG / STEP on request
DH-140BFU…11.9-18WR621.05:1UBR140PBR14076.225.466.882.55AlDWG / STEP on request
DH-180BFU…14.5-22WR511.05:1UBR180PBR18076.225.463.576.2AlDWG / STEP on request
DH-220BFU…17.6-26.7WR421.05:1UBR220PBR22076.225.463.576.2AlDWG / STEP on request
DH-260BFU…21.7-33WR341.05:1UBR260PBR26076.225.463.576.2AlDWG / STEP on request
DH-320BFU…26.3-40WR281.05:1UBR320PBR32076.225.463.576.2AlDWG / STEP on request

Part Number Guide

DH-100BFUPMA

“100”Waveguide Size | WR90 “BFU”Waveguide Type | Bulkhead Feedthrus “P”Flange Type | Rectangular Flat “M”Flange Type | Rectangular Grooved “A/C”Material | Aluminum / copper code; confirm availability for the selected model. Specify silver-plated brass separately.

Finish Note

Select the base metal and finish as a matched configuration. MIL-C-5541/MIL-DTL-5541 applies to aluminum conversion coatings; it is not a coating instruction for a bare brass or copper substrate. Define plated and masked surfaces on the approved drawing. Other finishes and paint colors are available on request.

For flange code references, review Waveguide Flange Standard EIA & IEC.

Check the Complete Bulkhead Interface

For a project-specific build, send the installed interface rather than only the WR size. The main inputs are the finished barrier thickness, cutout and mounting pattern, pressure medium and differential pressure, gasket requirement, exact mating flange designations, and the dimensional or RF checks you need reported.

Barrier Thickness, cutout, mounting holes, access and backing structure
Seal Pressure medium, differential pressure, temperature and leakage limit
Flanges Exact designation, aperture, bolt pattern, groove and orientation
Verification RF test, dimensions, pressure or leak-test acceptance criteria as required
Bulkhead Feedthrough Selection Guide
Waveguide components in progress at the Dolph Microwave factory

Have a Drawing, Existing Part Number or Non-Standard Wall Thickness?

Send the available drawing or interface data. Dolph Microwave states that custom waveguide assemblies can be built from detailed drawings or simple sketches, with machining, forming, brazing and testing handled in-house.

Related Waveguide Interfaces

Dolph Microwave rectangular waveguide pressure window components

Need the Waveguide Line Itself to Hold a Pressure Boundary?

A bulkhead feedthru mounts the waveguide through a wall or panel. If your requirement is a sealed RF window inside the waveguide path, review the Waveguide Pressure Windows family instead.

For replacement or project-specific sealing parts, see Waveguide Gasket, Die Cut.

Different Waveguide Family or Routing Requirement?

For broadband double-ridged interfaces, use the separate Double-Ridged Waveguide Bulkhead Feedthroughs range. If adjoining routing needs a flexible section, review Seamless Flexible WG.

For complete WR flange codes and standard references, use Waveguide Flange Standard EIA & IEC.

Dolph Microwave hybrid flexible and rigid waveguide assembly
CNC machining of microwave components at Dolph Microwave

Manufacturing and Verification Capabilities

MachiningCNC milling, turning, abrasive machining and diamond grinding
Waveguide WorkForming, bending, soldering and brazing of copper, copper alloys and aluminum
Surface ProcessingAnodising, passivation, electrolytic and electroless plating, electroforming
RF MeasurementRF vector and scalar measurement capability is listed up to 100 GHz. Request the actual test band and report for the ordered feedthrough.
Other TestingAnechoic chambers, high-power transmitters, EMI/EMS and environmental testing

Supplier Review Information

Company Dolph Microwave states that it was founded in 2001 and manufactures microwave components and antenna feed systems in Xi’an, China.
Quality Documentation Request the current quality-system certificate and scope required for supplier qualification.
Warranty A one-year warranty from delivery covers defective material and workmanship, subject to the published warranty terms.
Company Details About Dolph Microwave
Request Quote and Lead Time
Antenna and RF testing inside the Dolph Microwave anechoic chamber

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