What is the frequency range of S-Band?

• A. 900-1100 MHz
• B. 2900-3100 MHz
• C. 2100-2300 MHz
• D. 3500-3700 MHz

Answer: (B)

S-band is the portion of the spectrum typically defined to lie roughly between 2 and 4 GHz. This range is chosen because it offers a practical balance for radar: the wavelength is short enough for good resolution, yet atmospheric losses aren’t as severe as at higher frequencies.

The option that aligns with the common reference value used in many radar texts and exams is the 2.9 to 3.1 GHz window. That puts the frequency squarely in the middle of S-band and represents the conventional example used for S-band in these materials, which is why it’s identified as the correct range.

The other options fall outside the conventional reference in this context: 900–1100 MHz is in L-band, far below S-band; 2100–2300 MHz does fall within the overarching 2–4 GHz span but is not the typical central focus for S-band in this question; and 3500–3700 MHz sits at the upper edge of the band but, in this framing, the midrange around 3 GHz is the standard used to define S-band.