Bulkhead Feedthrus
Dolph Microwave Bulkhead Feedthrus provide hermetic waveguide penetration solutions for pressurized enclosures and cabinets. Covering WR-28 to WR-284 standards with ultra-low VSWR (<1.10), these precision-engineered feedthroughs ensure reliable signal integrity in military, aerospace, and communication systems. Features include corrosion-resistant plating, military-spec sealing, and EMI shielding for critical infrastructure applications.
Product Description:
Engineered for critical EMI shielding and pressure boundary integrity, Dolph Microwave Bulkhead Feedthrus enable reliable waveguide penetration through pressurized walls/cabinets. Covering WR-28 to WR-284 standards with industry-leading VSWR ≤1.05:1, these MIL-spec units feature hermetic sealing (neoprene/silicone gaskets) and military-grade finishes for aerospace and defense systems.
Key Technical Features:
Ultra-Low Signal Loss:
- Guaranteed VSWR ≤ 1.05:1 across all models
- Pressure Boundary Compliance: Heavy-duty flanges with integrated neoprene/silicone gaskets ensure IP-rated sealing
- Military Durability: Silver-plated brass or chem-film aluminum per QQ-S-365D Class A / MIL-C-5541E
- Precision Integration: Includes SS hardware, backing rings, and SurTec corrosion protection
- Broad Compatibility: Supports rectangular (WR-28 to WR-284) and double-ridge (WRD-180 to WRD-475) waveguides
Performance Specifications:
- Frequency Coverage: 2.6 GHz to 40 GHz
- VSWR: ≤1.05:1 (validated per model datasheet)
- Flange Options: UDR/UBR grooved or PDR/PBR cover types
- Materials: MIL-C-5541E aluminum (standard), QQ-S-365D silver-plated brass (optional)
- Environmental Protection: Standard black SurTec coating with optional finishes
| MODEL | FREQ. RANGE (GHz) | WG SIZE | VSWR | FLANGES TYPE | DIMENSIONS (mm) | MATERIAL | DATASHEET | |||||
| COVER | GROOVED | A | B | C | D | |||||||
| DH-32BFU… | 2.6-3.95 | WR284 | 1.05:1 | UDR32 | PDR32 | 108 | 41.4 | 165.1 | 184 | Al | DWG | STEP |
| DH-40BFU… | 3.22-4.9 | WR229 | 1.05:1 | UDR40 | PDR40 | 108 | 41.4 | 152.4 | 171 | Al | DWG | STEP |
| DH-48BFU… | 3.94-5.99 | WR187 | 1.05:1 | UDR48 | PDR348 | 108 | 41.4 | 133.35 | 152.4 | Al | DWG | STEP |
| DH-58BFU… | 4.64-7.05 | WR159 | 1.05:1 | UDR58 | PDR58 | 108 | 41.4 | 133.35 | 152.4 | Al | DWG | STEP |
| DH-70BFU… | 5.38-8.17 | WR137 | 1.05:1 | UDR70 | PDR70 | 108 | 41.4 | 101.6 | 121 | Al | DWG | STEP |
| DH-84BFU… | 6.57-9.99 | WR112 | 1.05:1 | UDR84/UBR84 | PDR84/PBR84 | 108 | 41.4 | 82.6 | 101.6 | Al | DWG | STEP |
| DH-100BFU… | 8.2-12.5 | WR90 | 1.05:1 | UDR100/UBR100 | PDR100/PBR100 | 95.3 | 35.1 | 73.2 | 88.9 | Al | DWG | STEP |
| DH-120BFU… | 9.84-15 | WR75 | 1.05:1 | UBR120 | PBR120 | 95.3 | 35.1 | 73.2 | 88.9 | Al | DWG | STEP |
| DH-140BFU… | 11.9-18 | WR62 | 1.05:1 | UBR140 | PBR140 | 76.2 | 25.4 | 66.8 | 82.55 | Al | DWG | STEP |
| DH-180BFU… | 14.5-22 | WR51 | 1.05:1 | UBR180 | PBR180 | 76.2 | 25.4 | 63.5 | 76.2 | Al | DWG | STEP |
| DH-220BFU… | 17.6-26.7 | WR42 | 1.05:1 | UBR220 | PBR220 | 76.2 | 25.4 | 63.5 | 76.2 | Al | DWG | STEP |
| DH-260BFU… | 21.7-33 | WR34 | 1.05:1 | UBR260 | PBR260 | 76.2 | 25.4 | 63.5 | 76.2 | Al | DWG | STEP |
| DH-320BFU… | 26.3-40 | WR28 | 1.05:1 | UBR320 | PBR320 | 76.2 | 25.4 | 63.5 | 76.2 | Al | DWG | STEP |
| 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 | Aluminium, Cu |
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| Note: All Dolph-MW models include an surtec/corrosion protection treatment and are painted flat black. Flanges are unplated, polished and surtec. Other finishes and paint colors are available upon request. |
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