Which unit is used to express frequency in RF communications?

Which unit is used to express frequency in RF communications?

• A. Hertz (Hz)
• B. Newton (N)
• C. Watt (W)
• D. Pascal (Pa)

Answer: (A)

Frequency is how many times something repeats each second, and in RF communications we describe how fast the carrier wave oscillates using the unit hertz (Hz). One hertz equals one cycle per second, and RF systems commonly reference frequencies in kHz, MHz, or GHz. Hertz is the standard SI unit for frequency, while the other listed units—newton (force), watt (power), and pascal (pressure)—measure different physical quantities and don’t describe how often a signal cycles. For angular speed, radians per second is used, but for regular RF frequency, Hz-based units are the default.

Frequency is how many times something repeats each second, and in RF communications we describe how fast the carrier wave oscillates using the unit hertz (Hz). One hertz equals one cycle per second, and RF systems commonly reference frequencies in kHz, MHz, or GHz. Hertz is the standard SI unit for frequency, while the other listed units—newton (force), watt (power), and pascal (pressure)—measure different physical quantities and don’t describe how often a signal cycles. For angular speed, radians per second is used, but for regular RF frequency, Hz-based units are the default.