Dual Polarized Horn Antenna 15dBi Gain, 75GHz-110GHz Frequency Range

Multipath propagation of radio waves

In the ultra-short wave and microwave bands, the radio waves will encounter obstacles (such as buildings, tall buildings or hills, etc.) during the propagation process to reflect the radio waves. Therefore, there are many kinds of reflected waves reaching the receiving antenna (broadly speaking, ground reflected waves should also be included), this phenomenon is called multipath propagation. Due to the multi-path transmission, the spatial distribution of the signal field strength becomes quite complicated and fluctuates greatly. In some places, the signal field strength is enhanced, and in some places, the signal field strength is weakened; The direction of polarization changes. In addition, different obstacles have different reflection abilities to radio waves. For example: Reinforced concrete buildings are more reflective of ultrashort waves and microwaves than brick walls. We should try our best to overcome the negative impact of multipath transmission effect, which is why people often use space diversity technology or polarization diversity technology in communication networks that require high communication quality.