Filtering Antenna With High Selectivity Using Multiple Coupling Paths From Source/Load to Resonators

This communication presents a filtering antenna with high selectivity using multiple coupling path from source/load to resonators. The high selectivity of the filtering antenna's boresight gain response is achieved by a novel coupling scheme, which induces additional coupling between source/loa...

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Published inIEEE transactions on antennas and propagation Vol. 66; no. 8; pp. 4320 - 4325
Main Authors Zhang, Bohai, Xue, Quan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antennas
Band-pass filters
Couplings
Cross coupling
Cross polarization
Filtering antenna
Filtration
multiple coupling paths
patch antenna
Patch antennas
quasi-elliptic boresight gain response
radiation nulls
Resonant frequency
Resonator filters
Resonators
Selectivity
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Abstract This communication presents a filtering antenna with high selectivity using multiple coupling path from source/load to resonators. The high selectivity of the filtering antenna's boresight gain response is achieved by a novel coupling scheme, which induces additional coupling between source/load and nonadjacent resonators to construct cross coupling paths. Thanks to the extra cross-coupling paths, the filtering antenna can generate a maximum of N radiation nulls with N resonators. Besides, a resonator using a combination of open-ended stub and short-ended stub is adopted to construct this novel coupling scheme more easily. For demonstration, a three-order filtering stacked patch antenna with a center frequency of 2.3 GHz and a fractional bandwidth of 15.2% is fabricated. Two independently controllable radiation nulls are located at 1.97 and 2.61 GHz. Unidirectional radiation patterns have been achieved with cross polarization lower than -20 dB and back lobes lower than -18 dB.
AbstractList This communication presents a filtering antenna with high selectivity using multiple coupling path from source/load to resonators. The high selectivity of the filtering antenna's boresight gain response is achieved by a novel coupling scheme, which induces additional coupling between source/load and nonadjacent resonators to construct cross coupling paths. Thanks to the extra cross-coupling paths, the filtering antenna can generate a maximum of N radiation nulls with N resonators. Besides, a resonator using a combination of open-ended stub and short-ended stub is adopted to construct this novel coupling scheme more easily. For demonstration, a three-order filtering stacked patch antenna with a center frequency of 2.3 GHz and a fractional bandwidth of 15.2% is fabricated. Two independently controllable radiation nulls are located at 1.97 and 2.61 GHz. Unidirectional radiation patterns have been achieved with cross polarization lower than -20 dB and back lobes lower than -18 dB.
This communication presents a filtering antenna with high selectivity using multiple coupling path from source/load to resonators. The high selectivity of the filtering antenn’s boresight gain response is achieved by a novel coupling scheme, which induces additional coupling between source/load and nonadjacent resonators to construct cross coupling paths. Thanks to the extra cross-coupling paths, the filtering antenna can generate a maximum of N radiation nulls with N resonators. Besides, a resonator using a combination of open-ended stub and short-ended stub is adopted to construct this novel coupling scheme more easily. For demonstration, a three-order filtering stacked patch antenna with a center frequency of 2.3 GHz and a fractional bandwidth of 15.2% is fabricated. Two independently controllable radiation nulls are located at 1.97 and 2.61 GHz. Unidirectional radiation patterns have been achieved with cross polarization lower than −20 dB and back lobes lower than −18 dB.
Author Bohai Zhang
Quan Xue
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Snippet This communication presents a filtering antenna with high selectivity using multiple coupling path from source/load to resonators. The high selectivity of the...
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SubjectTerms Antennas
Band-pass filters
Couplings
Cross coupling
Cross polarization
Filtering antenna
Filtration
multiple coupling paths
patch antenna
Patch antennas
quasi-elliptic boresight gain response
radiation nulls
Resonant frequency
Resonator filters
Resonators
Selectivity
Title Filtering Antenna With High Selectivity Using Multiple Coupling Paths From Source/Load to Resonators
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Volume 66
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