Research And Design Of Broadband Omnidirectional Antenna

This dissertation is about the research on broadband omnidirectional antenna.It is introduced that the history of the development of UWB antenna, UWB antenna theory, UWB antenna design.With the ultra-rapid development of broadband wireless communications, communication system requirements of the antenna are increasingly high requirements Therefore, UWB antenna design is a difficult task. UWB antenna is not only used by radio frequency (RF) technology send and receive data through the air, instead of the traditional wired LAN wired connection, but also for positioning and exploration, satellite communications, weapons guidance and other military communications. In this paper, the research and design is ultra-wideband omnidirect-ional airborne antenna at 35MHz-500MHz frequency band based on project requirements, Based on traditional UWB omnidirectional antenna analysis, it is designed that this three ultrawideband omnidirectional antenna:fractal loaded monopole antenna, planar monopole omnidirectional antenna, the new disc-cone omnidirectional antenna.The UWB antennas with small size presented in this paper, which are easy for integrations especially planar monopole antenna. It is detailed analysised deeply that antenna miniaturization and bandwidth of the specific measures in this article. This detailed analysis of the main part of the three omnidirectional antennas and performancee parameters in the simulation are given in the electromagnetic simulation software HFSS13. Finally, It shows a brief description of the antenna matching network design,also designs the two antenna matching circuit design that can not fully meet the requirements, and briefly mentions the matching network the concept by digital control.