Novel Designs of Broadband Dual-polarized Base-station Antennas with Different Radiation Patterns

Project: Research

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The great success in the development and commercialization of mobile phone technologies fosters the advancement of various wireless communication systems. The general trend is to develop low interference, high capacity and high speed wireless links for outdoor and indoor transmission of voice, video and data information. It has been recognized that the performance of antennas plays an important role in the advancement of current and future mobile communication systems. In particular, the multiple antenna approaches, such as MIMO, diversity antennas or smart antennas, have attracted a lot of research interests in both antenna and wireless communications communities. In contrast with those classical antennas with single polarization, either linear or circular, the dual-polarized antennas offer advantages of reduction in installation space and low coupling effect which are crucial for the applicability of a multiple antenna system. Although there are many dual-polarized antenna designs proposed in the last two decades, their performances are far from satisfactory, especially on the bandwidth and on the variation of characteristics over the operating bandwidth. Also, very few designs with conical shaped radiation pattern are available. This characteristic is preferable for indoor environments when the base station antenna is mounted on the ceiling of a building. In this project, based on a newly developed high performance wideband antenna element by the principal investigator, designated as the magneto-electric dipole, broadband dual-polarized planar antennas will be developed for base stations of wireless systems installed in different environments. Planar antennas with conical and cardiac shaped radiation patterns will be designed and tested. The integration of two dual-polarized planar antennas, one with conical shaped radiation pattern and the other with cardiac shaped radiation pattern, into a compact broadband antenna system with both polarization diversity and pattern diversity capability will also be investigated. The antennas developed can be operated at different microwave frequency ranges and will be able to enhance the performances of current and future wireless communication systems.


Project number9041371
Grant typeGRF
Effective start/end date1/10/0827/11/12