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In this paper, we demonstrated a wideband planar antenna based on periodic structure. Firstly, we introduce and analyze a complementary structure to the conventional mushroom-like CRLH structure. Then, periodic complementary-CRLH (C-CRLH) structures are used to design antenna with wide bandwidth. At last, a compact antenna with 88% impedance bandwidth is achieved by using 3×4 periodic unit-cells,...
A printed log-periodic dipole antenna (PLDPA) with balanced feed structure is proposed. The traditional feeding structure using a single coaxial cable and feed lines with equal width will lead to an unbalanced current distribution, thus, the radiation pattern performances a frequency dependent deflection status. In this paper, we have modified the width of two feed lines to compensate the effect of...
From applications of high-impedance surfaces, TM surface wave pass-band below TM band-gap was found, and for periodic artificial surfaces without a band-gap, a similar phenomenon can be found below the leaky-wave band, which form the primary discovered special features in the present research work. A novel type of surface-wave antenna based on artificial surface was built, the antenna, which has wide-band...
A novel rectangular patch antenna was specifically designed using planar-patterned metamaterial concepts. The patterned metal patch and finite ground plane form a coupled capacitive-inductive (C-L) circuit of negative index metamaterial. For the wideband, high efficiency, low loss and low VSWR, the novel type of antenna is used to design meta array, the array still have bandwidth significantly broadened...
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