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A novel method of reconfigurable substrate integrated waveguide (SIW) antenna is proposed. By loading ferrite slabs and applying DC magnetic bias, we realize the reconfiguration of operating frequency and polarization of the SIW antenna. The experiments demonstrate the reconfigurable SIW antenna could have broadband frequency tunable range which is up to 14.9% in microwave X-band, and the radiation...
A new type of frequency reconfigurable antenna, the ferrite slab loaded substrate integrated waveguide (SIW) antenna, is proposed. Due to the loaded ferrite, the operating frequency of the antenna can be tuned in a wide frequency range by bias magnetic field and the position of ferrite slab in the antenna. Three example reconfigurable SIW antennas are designed, fabricated and measured. The experimental...
We explore radiation of a line source within a parabolic cylinder made of left-handed metamaterials. The far field radiation patterns show the metamaterial parabolic cylinder can enhance the directivity of the line source radiation. It is found that the focal length and the feature length of the parabola affect the directivity. Further improvement of the directivity is realized by changing the shape...
We have investigated radiation of a line source within a hollow cylinder made of left-handed materials (LHMs). We find that the LHMs cylinder functions directivity enhancement of source radiation. However, electromagnetic loss can degrade the enhancement effects. By comparing the effects of electric and magnetic losses, we find that magnetic loss is a main issue and should be minimized in order to...
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