To take into account the loss in the cable, we just have to deduce the 3 dB loss from the 18 dBi gain and use a modified antenna gain of G = 15 dBi. In one click we find the electrical field strength E = 1.4 V/m, the magnetic field strength H = 3.7 mA/m and the power density S = 5.0 mW/m2.
Types of Data: Primary and Secondary data. There are many ways of classifying data. A common classification is based upon who collected the data. Primary data: Data collected by the investigator himself/ herself for a specific purpose. Examples: Data collected by a student for his/her thesis or research project. (In movies) The hero is directly told by the heroine that he is her âideal manâ.
It is not a published data; it has to be gathered by the researcher himself by tapping various resources. Primary data is usually collected for specific purposes. The main sources from where primary data can be obtained are (a) Salesmen (b) Dealers; (c) Consumers etc. It is a very slow process of collecting data and involves huge costs. But results obtained from this data are original and tend to be more accurate and reliable.