Which of the following can be connected through AP and antenna?

Question

Options

• ANetwork cable
• BCATV coaxial cable
• CPower cord
• D50ohm RF coaxial cable

• A
  13% (3)
• B
  9% (2)
• C
  4% (1)
• D
  74% (17)

Explanation

A 50-ohm RF coaxial cable is the industry-standard connection between an access point (AP) and an external antenna, matched to the impedance used by virtually all Wi-Fi and wireless networking equipment - this impedance match minimizes signal reflection and maximizes power transfer. Network cable (A) carries Ethernet data signals and connects the AP to a switch or router, not to an antenna. CATV coaxial cable (B) uses 75-ohm impedance, which is designed for cable TV distribution and would cause impedance mismatch and signal loss in RF antenna systems. A power cord (C) supplies AC electricity to the AP and has no role in RF signal transmission to an antenna.

Memory tip: Think "50 ohms = RF, 75 ohms = TV" - if the question involves a wireless AP or antenna, always reach for the 50-ohm RF coax.

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