Research And Design Of Ultra-wideband Antennas And Their Notch Characteristics

Ultra?technology as an important part of wireless communication technology, It is used by the real from the 1960 s, Originally, it is used for radar detection, but after a period of time broadband technology development is relatively slow. Later because of its high transmission rate, good secrecy, high gain, low power consumption and so on, It is becoming a hot spot of domestic and foreign scholars research and discussion. In the already exist within a prescribed ultra wideband spectrum microwave Internet, wireless local area network(LAN) and global interference of X band satellite communication system. In order to exclude the interference of the spectrum people launched the study of trap antenna.Paper first introduces some theories of ultra?wideband system foundation and the main performance parameters of the ultra?wideband antenna, Such as gain, return loss, voltage standing wave ratio and so on. The second paper introduces the design of two ultra broadband antenna, Circular aperture monopole ultra?wideband monopole antenna peace panel ultra?wideband antenna. Using the simulation software to analyze some parameters of the antenna optimization finally concluded that the best size. The two antenna in each performance is relatively good, meet the design requirements of ultra?wideband antenna. Then introduces the design of two single trap ultra broadband antenna, Elected to the notch frequency5.15?5.85 GHz,After running the simulation of the antenna performance is good, meet the requirement of the trap. In addition also introduced a double notch ultra?wideband antenna, Elected to the notch frequency3.35?3.75 GHz and 5.15?5.85 GHz. Finally introduced a has three potter sex ultra?wideband antenna,It in 3.3 to 3.7 GHz, 5.15 to 5.85 GHz, 7.25 to 7.75 GHz form notch. Ruled out the spectrum for uwb communication system, Has great practical value.Uwb?technology in the future will be the best choice of the high rate of short distance wireless communication technology, And ultra?wideband antenna is a uwb communication system is used to transmit and receive signal is the key device. Therefore, the research and design of ultra?wideband antenna has very important practical significance.