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- Title
Suppression of Cross-Polarization of the Microstrip Integrated Balun-Fed Printed Dipole Antenna.
- Authors
Huang Jingjian; Zhang Xiaofa; Xie Shaoyi; Wu Weiwei; Yuan Naichang
- Abstract
The high cross-polarization of the microstrip integrated balun-fed printed dipole antenna cannot meet the demands of many engineering applications. This kind of antennas has high cross-polarization levels (about -20 dB). And we find that the high cross-polarization radiation is mainly produced by the microstrip integrated balun rather than the dipole itself. The very limited method to lower the cross-polarization level of this kind of antennas is to reduce the substrate thickness. In this paper, to improve the low cross-polarized performance, firstly, an equivalent model is presented to analyze the cross-polarization radiation. Secondly, a novel structure with low cross-polarization is proposed. The microstrip integrated balun is enclosed by a center slotted cavity. The E-field of the microstrip integrated balun is transformed parallel to the dipole arms by the slot, so the radiation of the cross-polarized component is suppressed. Measured results show that this structure can achieve a bandwidth wider than 40% while reducing the cross-polarization level to less than -35 dB within the frequency band.
- Subjects
DIPOLE antennas; POLARIZATION (Electricity); MICROSTRIP transmission lines; BALUNS; BANDWIDTHS
- Publication
International Journal of Antennas & Propagation, 2014, p1
- ISSN
1687-5869
- Publication type
Article
- DOI
10.1155/2014/765891