• BJ-JRU
  • BJ-JR thum
  • BJ-JRU thum

50 ohm BNC Receptacles

CANARE 50 ohm BNC jack to jack receptacles.

Key Features and Benefits

  • For panel mount.
  • Two types: Standoff type and Flush-mount type.
  • Tech Data
  • Tech Note
  • Downloads


Model Description Standard package
BJ-JR Jack to Jack 20 pcs

Key Features and Benefits

  • Mounting hole size is same as that for BCJ-R/1 connector

Flush-mount Receptacles

Model Description Flange Type Standard package
BJ-JRU Jack to Jack ITT XLR-F77 20 pcs
BJ-JRUD Neutrik D

Key Features and Benefits

  • Two types of flanges are available.
  • Flush-mount receptacle prevents damage on the jack.

Technical Note

Voltage Standing - wave Ratio (VSWR) and Return Loss

Terminating the receiving end of a limited length coaxial cable using a resistance value not equal to its characteristic impedance creates a reflected wave that returns back down the cable to the sending end. The result is interference developing between the travelling wave and the return wave which results in a standing wave that causes voltage levels to fluctuate. The degree to which terminating resistance matches the characteristic impedance is indicated using the VSWR or voltage standing-wave ratio standard shown in Fig. 1. Going hand in hand with the VSWR ratio is the return loss factor which measures the size of the reflected wave current in relation to the travelling wave current. (See Fig. 2)

Fig. 1 Voltage Distribution Over Coaxial Cable

VSWR Return Loss (dB)
2 9.54
1.5 13.98
1.2 20.83
1.1 26.44
1.05 32.26
1.02 40.09
1.01 46.06

Fig. 2 VSWR to Return Loss Conversion Table





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