Abstract
In this paper, a low-profile magneto-electric (ME) dipole antenna with parasitic patches is designed and realized based on multilayer low temperature co-fired ceramic (LTCC) technology. The magnetic dipole is introduced in the form of the folded metal wall. With this approach, the height of ME dipole antenna can be reduced to 0.1λ 0 (where λ 0 is the free-space wavelength). Furthermore, two parasitic patches are placed on the top of structure, resulting in a 25% reduction in original size. The antenna is optimized by a new-rising nature inspired algorithm namely bat algorithm (BA). Simulated results show that the proposed antenna achieves an impedance bandwidth of 34% (from 23 to 32.5 GHz). Moreover, both symmetrical radiation pattern and good cross-polarization depression are achieved across the entire operating band, with a stable realized gain of 5.3 ± 0.5 dBi and radiation efficiency of over 90%.
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