Radio interference refers to the phenomenon that occurs during radio communication, where some electromagnetic energy enters the receiving system or channel through direct or indirect coupling, resulting in a decrease in the quality of useful received signals, information errors or loss, or even blocking communication. Radio interference signals are mainly electromagnetic energy that enters the…
Satellite dishes rely on electromagnetic signals to communicate with Earth and orbiting satellites to provide services such as television broadcasts, Internet connectivity, and GPS navigation. Typically, signals operate within specific frequency bands, including the 12-18 GHz Ku-band for television or the 26.5-40 GHz Ka-band for high-speed data. This is obviously due to the fact that…
1. What is antenna? The basic function of an antenna is energy conversion, which converts the electrical signal transmitted from the wire (feeder) into radio waves and transmits them into space. The mechanism of antenna radiation of electromagnetic waves is derived from Maxwell’s equations. Electric charges can generate electric fields, and currents can generate magnetic…
Satellite communication is a wireless communication method that uses satellites as the communication medium. In previous articles, we introduced satellite communication systems of parabolic antennas in detail, mainly analyzing parabolic antennas. Today we are going to introduce another type – phased array antennas. Antesky Earth Station Antenna Projects of parabolic antennas Phased array antenna is a type…
As we all know that the 5G network of mobile communications has been officially launched, and the frequency used by 5G base stations is close to the C band of satellite communications, which will interfere with the downlink frequency band of satellite earth stations and seriously threaten the normal reception of satellite broadcasting and…
Previously, we introduced the basic theory of satellite antenna dish types in detail, which mentioned the concept of antenna polarization. Regarding the polarization of electromagnetic waves, we described it in detail in the article ” The Polarization of Antesky 4.5m Satellite Dish” and compiled some vivid pictures to illustrate it. In practical applications, electromagnetic waves are emitted by…
A radome is a structural, weatherproof enclosure that protects an antenna. The radome protects the antenna from weather and hides the antenna electronics. The radome is made of a material that is transparent to radio waves. It has good electrical properties for electromagnetic wave penetration and mechanical properties that can withstand harsh external environments. Outdoor…
Satellite communication refers to the information communication between two or more earth station antennas using artificial earth satellites as relay stations to forward radio signals. It includes the relay station-communication satellite part, and the terminal station-earth station antenna part. Communication satellites can be divided into low orbit (LEO) communication satellites, medium orbit (MEO) communication satellites, high…
We shipped 1 set of 3.7m Tx/Rx antenna with Ku-band to Mauritania this March. Customer installed this 3.7m Tx/Rx antenna at their site in April , and after they done the installation, they met below problems during their testing, which the cross polarization are always fluctuating between 21dB to 25dB. cross polarization are always fluctuating…
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