Microwave Transmission Line And It’s Performance Analysis
Islam, Md. Azimul
slam, Md. Rafiqul
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Microwave communication is the transmission of signals via radio using a series of microwave towers. Microwave communication is known as a form of “line of sight” communication, because there must be nothing obstructing the transmission of data between these towers for signals to be properly sent and received. Microwave radio transmission is commonly used by communication systems on the surface of the Earth, in satellite communications, and in deep space radio communications. Other parts of the microwave radio band are used for radars, radio navigation systems, sensor systems, and radio astronomy. This project which consists of three major parts, first part is the VSWR. Voltage standing waves are the result of reflected RF energy. As the VSWR approaches 1.00:1 VSWR of 1:1 means that there is no power being reflected back to the source. This is an ideal situation. That rarely, if ever, is seen. In the practical field, a VSWR of 1.35:1 (or simply 1.35) is considered excellent in most cases. At a VSWR of 2.0, approximately 10% of the power is reflected back to the source. Not only does a high VSWR mean that power is being wasted, the reflected power can cause problems such as heating cables. The Second part is DTF which is distance to fault Measurement. If a 60 meter transmission line gets VSWR of 2 or more than 2 at the point of 55 meter then have to understand that DTF occur at the point of 55 meter. The analyzer can locate faults and discontinuities on cables and transmission lines. The last part is RSL which is stand for receive signal level. If the RSL value is (32-40) then the signal transfer level will be very good otherwise receive signal level will not be good. It is expressed in voltage per length or signal power received by a reference antenna. High powered transmissions, such as those used in broadcasting, are expressed in dB-millivolts per metre (dBmV/m). For very low-power systems, such as mobile phones, signal strength is usually expressed in dB-microvolt’s per meter (dBμV/m). In summary this project has proposed and then solved several resource allocation problems in transmission line.