DigiKey-emag-Connectors-Vol-11

CONNECTOR-TO -CONNECTOR

VOLTAGE STANDING WAVE RATIO VSWR)

ORDER NO.

CABLE LENGTH

LENGTH

LENGTH

89762-1540

152.40 mm / 6.00"

1.00 dB

89762-1541

228.60 mm / 9.00"

1.43 dB

89762-1542

304.80 mm / 12.00"

1.85 dB

086 low-loss

1.50 max to 40 GHz

89762-1543

381.00 mm / 15.00"

2.15 dB

89762-1544

457.20 mm / 18.00"

2.85 dB

2.92 mm ST plug to 2.92 mm ST plug

98762-1580

152.40 mm / 6.00"

1.65 dB

89762-1581

228.60 mm / 9.00"

2.30 dB

89762-1582

304.80 mm / 12.00"

2.90 dB

047 low-loss

1.55 max to 40 GHz

89762-1583

831.00 mm / 15.00"

3.60 dB

89762-1584

457.20 mm / 18.00"

4.20 dB

Figure 2: Shown are examples of VSWR and insertion loss figures for efficient, low-loss, microwave-frequency cables. (Image source: Molex)

Impedance matching is another key parameter. RF signals are susceptible to interference from incident and reflected waves caused by an impedance mismatch along the signal line. To minimize signal loss, the cable assembly should have the same impedance as the connected load, typically either 50 or 75 ohms (Ω). It is good practice to design the connectors and cables together to achieve the best match.

A real-world example of this practice is the 0897629290 assembly that pairs Molex BNC connectors with a Belden 4794R cable for high-end 75 Ω applications.

ratio of an incident signal to the reflected signal that provides a measure of how efficiently RF signals are carried from source to load. Insertion loss is the amount of energy that a signal loses as it travels along a connector and cable. Figure 2 illustrates some examples of each.

For particularly demanding applications like test and measurement, it may be

necessary to carefully consider additional parameters like VSWR and insertion loss. VSWR is the

we get technical

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