Question
What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?
Answer Options
- A) 50 MHz
- B) 500 MHz
- C) 4 GHz
- D) 40 GHz
Correct Answer: C
Explanation
The BNC (Bayonet Neill-Concelman) connector is a miniature quick-disconnect RF connector commonly used for test equipment and VHF/UHF amateur gear. They are specified for a certain operational frequency limit beyond which the Standing Wave Ratio (SWR) increases due to poor impedance matching and internal reflections.
The BNC connector is generally reliable and maintains a low SWR up to a typical upper frequency limit of 4 \text{ GHz}. This makes them suitable for all common HF, VHF, and UHF amateur bands, though they are usually avoided for the high-power applications commonly found on HF.
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