suppression of cross-polarization of the microstrip integrated balun-fed printed dipole antenna
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ID: 136392
2014
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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.
| Reference Key |
jingjian2014internationalsuppression
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|---|---|
| Authors | ;Huang Jingjian;Zhang Xiaofa;Xie Shaoyi;Wu Weiwei;Yuan Naichang |
| Journal | american journal of physiology endocrinology and metabolism |
| Year | 2014 |
| DOI |
10.1155/2014/765891
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| URL | |
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