en اپتیک پزشکی، میکروسکوپ نوری و بیوفوتونیک Medical Optics, Optical Microscope, Biophotonics پژوهشي Research <span style="font-size:11pt"><span new="" roman="" style="font-family:" times=""><span style="font-weight:bold"><span style="color:#000000"><span style="font-style:normal"><span style="white-space:normal"><span style="text-decoration:none">Using terahertz waves for intra-body communications between nanomachines is associated with dissipation during propagation, of which scattering is one of the most important effects. In this paper, scattering path loss with two different assumptions of air-enclosed and tissue-enclosed in subcutaneous fat is calculated and compared. The results show that for TM polarization, air-enclosed assumption gives smaller and greater scattering loss for frequencies less and bigger than 0.26 THz. The greatest difference between air-enclosed and tissue-enclosed results is observed for TE polarization at the approximate frequency of 0.4 THz.</span></span></span></span></span></span></span> Scattering Path Loss, Terahertz, Intra-Body Wireless Communications 139 144 http://ijop.ir/browse.php?a_code=A-10-911-1&slc_lang=en&sid=1 Zoha Ameri z.amerimahabadi@mail.sbu.ac.ir 10031947532846004665 10031947532846004665 No Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran Fazel Jahangiri f_jahangiri@sbu.ac.ir 10031947532846004666 10031947532846004666 Yes Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran