Experimental Comparison of Terahertz and Infrared Signaling in Laboratory-Controlled Rain

Comparison of Experimental and Theoretical Determined Terahertz Attenuation in Controlled Rain

“…Ports on the top of the chamber enable its filling with water, pressurizing the chamber, and monitoring the air pressure inside the chamber. Photo of the rain chamber can be found in [12] with those occurring in nature visualizes the feasibility to produce up to heavy rainfalls in our laboratory setup with an effective path length of 4 m.…”

Review of weather impact on outdoor terahertz wireless communication links

“…In testbed setup of Figure 6, the slightly larger BER in the IR is attributed to slightly different receiver sensitivity curves for the THz and IR signals. The same amount of attenuation increases the BER of the THz channel less than the BER of the IR signal [28].…”

“…However, for larger particles such as rain drops, the attenuation for FSO and THz are 2 , r is radius of a raindrop) is slightly 2 ). Consequently, one expects the attenuation in the THz beam due to rain to be slightly larger than in an IR channel [27,28].…”

“…Consequently, significant attenuation might be expected at sufficiently high rain rates (Section 2.3). The rain chamber [27,28] developed at NJIT has a dimension of 100×20×20cm 3 (L×W×H) as shown in Figure 4a. Air and water valves on its top are used to fill and pressurize the chamber.…”

“…Using the same rain chamber, co-propagating THz and free-space optical links are sent through the same weather conditions [28]. At a rain rate of 213 mm/hr the THz link suffers a little bit higher attenuation (~0.1 dB) compared to the IR link, which is due to the slightly larger extinction cross section of rain drops at THz frequencies.…”