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- W111171694 abstract "Microstrip patches filled with left-handed structures are proposed to obtain dual band circularly polarized antennas. The proposed antennas have two modes at different frequencies with similar characteristics to the fundamental mode of a conventional patch. These modes are excited in two orthogonal directions with a 90° phase shift to obtain dual band circularly polarized antennas. The most important feature of the proposed antennas is that the frequency ratio between the working frequencies can be set within a large range: from values smaller than 1.2 to values larger than 2.2. Finally, a dual band circularly polarized antenna for GSM 1800 and WCDMA is designed, manufactured and measured. The working ratio is only 1.17, which cannot be obtained with other approaches. (6 pages)" @default.
- W111171694 created "2016-06-24" @default.
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- W111171694 date "2007-01-01" @default.
- W111171694 modified "2023-09-25" @default.
- W111171694 title "A dual band circularly polarized antenna based on a microstrip patch filled with left- handed structures" @default.
- W111171694 doi "https://doi.org/10.1049/ic.2007.1392" @default.
- W111171694 hasPublicationYear "2007" @default.
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