Automatic selection of transmission frequencies using the method of formation of pseudo­random sequences

It is extremely important in many technological areas to provide stable wireless secure communication. A significant contribution the final result made by shape of transmitter antenna, and more precisely, signal directional pattern this antenna. For cases where a portion system requirements remain unknown, generally best approach will be follow universality. But, if for are precisely defined, it advisable maximize efforts achieve or that state. In case, correct choose antenna depending on conditions, having previously weighed all features available design solutions. The article examines compares two types antennas — omnidirectional narrowly directional. Their strengths weaknesses described; situations which they can applied get better results compared analogues at same power. selection optimal parameters carried out basis predetermined information about purpose using transmitter. considered allows us draw conclusion advantage ones situation one main indicators distance between receiver. Also, changing such as angle width you reduce negative impact type transmitters. example, non-stationary object may accidentally leave range radio from an but widening significantly probability scenario.