Abstract
A substrate-integrated suspended line triple-band multimode antenna with stacked patch and two L-strips is presented for multiband applications. The two L-strips connected the stacked patch by vias, which can be regarded as a modified step impedance resonator, are introduced for producing two resonant frequencies at 2.45 and 3.6 GHz by means of stimulating dual modes. The two resonant frequencies rely on not only the electrical length but also the impedance ratio. In the higher frequency band, resonant frequencies at 6.1 and 5.25 GHz are generated by the stacked patch and via which connects the feed line and the driven patch, respectively. The measured results reveal that the first band from 2.4 to 2.45 GHz with gain of 4.9 dBi, the second band from 3.52 to 3.6 GHz with gain of 6.2 dBi, and the third band from 5.12 to 6.18 GHz with gain of 10 dBi are acquired. In addition, the radiation patterns with stable property across the whole operating band are obtained.
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