Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance
This paper studies the mutual coupling effect between array elements of two- and four-element ultrawideband (UWB) linear arrays on their performances. For simplicity, it is assumed that both antenna arrays are fed by independent microstrip lines with the same power amplitudes and equal phases. From...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2011/142581 |
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| author | Osama Ahmed Abdel-Razik Sebak |
| author_facet | Osama Ahmed Abdel-Razik Sebak |
| author_sort | Osama Ahmed |
| collection | DOAJ |
| description | This paper studies the mutual coupling effect between array elements of two- and four-element ultrawideband (UWB) linear arrays on their performances. For simplicity, it is assumed that both antenna arrays are fed by independent microstrip lines with the same power amplitudes and equal phases. From our study, array bandwidth improvement is achieved for both array types when the mutual coupling is strong enough or interelement spacing is small. The mutual coupling also enhances the array realized gain especially in the midfrequency band (5–8.5 GHz) while it deteriorates the gain outside that frequency range. Proper tuning for interelement spacing with enough mutual coupling enhances the array realized gain at most frequencies and makes it more stable across the desired frequency range. From the radiation pattern results, the grating lobes appear in UWB arrays when the element spacing is greater than two wavelengths at the upper edge frequency, 10.6 GHz, or half wavelength at the lower edge frequency 3.1 GHz. Two fabricated array prototypes with corporate feed are fabricated and tested to validate the theoretical analysis. The effect of using T-junction power divider is clear on the reflection coefficient |S11|. Both numerically simulated and experimental results successfully demonstrate our analysis. |
| format | Article |
| id | doaj-art-c1e5351612cf4886ac4188aa0ec1a90a |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-c1e5351612cf4886ac4188aa0ec1a90a2025-02-03T01:21:21ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772011-01-01201110.1155/2011/142581142581Mutual Coupling Effect on Ultrawideband Linear Antenna Array PerformanceOsama Ahmed0Abdel-Razik Sebak1Electrical and Computer Engineering Department, Concordia University, Montreal, QC, H3G 1M8, CanadaElectrical and Computer Engineering Department, Concordia University, Montreal, QC, H3G 1M8, CanadaThis paper studies the mutual coupling effect between array elements of two- and four-element ultrawideband (UWB) linear arrays on their performances. For simplicity, it is assumed that both antenna arrays are fed by independent microstrip lines with the same power amplitudes and equal phases. From our study, array bandwidth improvement is achieved for both array types when the mutual coupling is strong enough or interelement spacing is small. The mutual coupling also enhances the array realized gain especially in the midfrequency band (5–8.5 GHz) while it deteriorates the gain outside that frequency range. Proper tuning for interelement spacing with enough mutual coupling enhances the array realized gain at most frequencies and makes it more stable across the desired frequency range. From the radiation pattern results, the grating lobes appear in UWB arrays when the element spacing is greater than two wavelengths at the upper edge frequency, 10.6 GHz, or half wavelength at the lower edge frequency 3.1 GHz. Two fabricated array prototypes with corporate feed are fabricated and tested to validate the theoretical analysis. The effect of using T-junction power divider is clear on the reflection coefficient |S11|. Both numerically simulated and experimental results successfully demonstrate our analysis.http://dx.doi.org/10.1155/2011/142581 |
| spellingShingle | Osama Ahmed Abdel-Razik Sebak Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance International Journal of Antennas and Propagation |
| title | Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance |
| title_full | Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance |
| title_fullStr | Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance |
| title_full_unstemmed | Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance |
| title_short | Mutual Coupling Effect on Ultrawideband Linear Antenna Array Performance |
| title_sort | mutual coupling effect on ultrawideband linear antenna array performance |
| url | http://dx.doi.org/10.1155/2011/142581 |
| work_keys_str_mv | AT osamaahmed mutualcouplingeffectonultrawidebandlinearantennaarrayperformance AT abdelraziksebak mutualcouplingeffectonultrawidebandlinearantennaarrayperformance |