BMA
BMA

Government designation BMA (Blindmate A) was developed in the 1980's. The originally designated OSP™ connector by M/A-Com has excellent electrical performance up to 22 GHz in a compact size.  SV Microwave offers extended frequencies on most BMA connector designs up to 26.5 GHz. With a slide-on interface and a connector durability of 5000 cycles, this BMA blindmate is suitable for high performance microwave applications.

 

SV Microwave is the only DSCC qualified source for BMA's IAW MIL-PRF-31031 specifications. BMA blindmates preserve mechanical and electrical performance with interfacial misalignment features. The BMA blindmate connectors have an external spring to provide mechanical movement for extensive mechanical misalignment of ± .020 radial and .060 axial minimum. BMA blindmates are used for wireless infrastructure, satellite equipment and test and measurement.

 

 

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Product Brochure

 

Features & Benefits

Interface

  • Air Dielectric
  • Compliant Contacts
  • Hooded Female Contact

 

 

Mechanical

  •  .020 Radial Float
  • .060 Axial Float 
  • Low Profile Designs
  • Stainless Steel Bodies
  • Hermetic Versions
  • Moisture Seal


 

Applications
  • Satellite Communication Equipment
  • Microwave Subsystems
  • Test and Measurement
  • Wireless Base Station Equipment
  • Military Radar

 

Technical Specifications

 

General

Materials

Body: Stainless steel per AMS-5640, UNS S30300, Type l. Brass is also available.
Contact: Beryllium copper per ASTM-B-196.
PTFE per ASTM-D1710.

Finish 

Body: Gold plated per ASTM-B-488 over nickel per SAE AMS-QQ-N-290.
Class: 1 or passivate.
Center Contact: Gold plated per ASTM-B-488 over nickel per SAE AMS-QQ-N-290. Class: 1

Design

Interface dimensions per MIL-STD-348. 

 
 

Electrical

 

RG 402 (.141) Semi-Rigid

RG 405 (.085) Semi-Rigid

Frequency 

DC to 22 GHz

DC to 22 GHz

(DC to 26.5 GHz available for semi-rigid cable and receptacles)

Nominal Impedance 

50 Ohms

50 Ohms

VSWR
     DC to 18 GHz
     18 to 22 GHz

 

1.02 + .005f (GHz)

1.02 + .008f (GHz)

 

1.05 + .005f (GHz)

1.05 + .009f (GHz)

RF Transmission Loss

.03x√¯f (GHz)

.03x√¯f (GHz)

Insulation Resistance 

5,000 Megohms Min.

5,000 Megohms Min.

Contact Resistance
     Center Contact
     Outer Contact  

 

2.0 Milliohms Max.

2.0 Milliohms Max.

 

2.0 Milliohms Max.

2.0 Milliohms Max.

Dielectric Withstanding Voltage

1500 Volts RMS

1000 Volts RMS

Corona Extinction Voltage at 70,000 Ft. 

375 Volts Min.

335 Volts Min.

RF High Potential at 5 MHz 

1,000 Volts RMS

670 Volts RMS

RF Leakage
     Interface Only 

–(90-fGHz) dB Min.

(fully mated)

–(90-fGHz) dB Min.

(fully mated)

   

 

Environmental

Temperature Rating

–65°C to +125°C (Semi-Rigid)

Corrosion (Salt Spray)

MIL-STD-202, Method 101, Condition B

Vibration

MIL-STD-202, Method 204, Condition D, 20 Gs

Shock

MIL-STD-202, Method 213, Condition I, 100 Gs

Thermal Shock

MIL-STD-202, Method 107, Condition B, -65°C to +125°C

Moisture Resistance

MIL-STD-202, Method 106, Less Step 7B

Barometric Pressure (Altitude)

MIL-STD-202, Method 105, Condition C, 70,000 Ft.

 

 

 Mechanical 

Force to Engage

48 Ounces Max.

Force to Disengage

1.5 Pounds Max.

Center Contact Retention

6 Pounds Min.

Durability

5,000 Cycles

Radial Misalignment    

Rigid Mount    

Float Mount

 

±.004 Inch

±.020 Inch