Metamaterial Inspired Structure With Offset-Fed Microstrip Line for Multi Band Operations

Abstract

A miniaturized rectangle-shaped complementary split ring radiating element with an offsetfed microstrip line is reported for multiband operations. The fabricated antenna with a compact size of 19×19×1.6 mm 3 is designed on an FR-4 substrate with loss tangent tan δ = 0.02 and dielectric constant (ε r ) of 4.4. Multiband and antenna miniaturization are achieved by a complementary split ring radiating element, and it produces an impedance bandwidth of 40 MHz resonance at 3.03 GHz, 40 MHz resonance at 3.66 GHz, and 1470 MHz resonance at 5.5 GHz. The passband behaviour of the complementary split ring radiating element is studied in detail for obtaining multiband abilities of the miniaturized antenna. The metamaterial property of the complementary split ring radiating element is analyzed, by which the negative permittivity (ε) existence and the new resonance frequency are confirmed. The fabricated antenna shows optimum performance at the measured radiation characteristics.

A Circular Sector With an Inverted L Shaped Monopole Antenna for Tri-Band Applications

“…The antenna in [5] is designed using a pentagon patch with slots and hook branches, and thus it is more complex to design and larger in size than the proposed antenna. The antennas in [6][7][8][9][10][11] are designed using SRR or CSRR while antennas in [12][13][14] are designed using fractal techniques. All these antennas [6][7][8][9][10][11][12][13][14] not only are difficult to design but also have larger dimensions.…”

“…The antennas in [6][7][8][9][10][11] are designed using SRR or CSRR while antennas in [12][13][14] are designed using fractal techniques. All these antennas [6][7][8][9][10][11][12][13][14] not only are difficult to design but also have larger dimensions. The proposed single branch antenna is designed by reducing the electromagnetic coupling between the higher-order modes by selectively cutting the symmetrical portion and reducing the thickness of the monopole.…”

“…Multiband antennas using split-ring resonator (SRR) and metamaterial have been reported [7][8][9][10][11]. A circularly polarized (CP) strip and SRR loaded tri-band slot antenna is reported in [7], while a multiband CP annular ring antenna loaded with eight slots and octagonal closed ring resonators is designed in [8].…”

“…A multiband hexagonal split-ring resonator (HSRR) enclosing a circular split-ring (CSR) is proposed for sub-6 GHz bands [10]. A metamaterial inspired antenna using CSRR is reported in [11]. CSRRs are employed to miniaturize the antenna.…”

Non-Bianisotropic Meta Material Split Ring Resonator Loaded With MIMO Antenna For Wireless Body Area Networks

“…The -negative metamaterial has applications in millimeter wave frequency for phase shifters, circular polarization, and the elimination of cross-polarization. Additionally, metamaterial absorbers have practical uses in energy harvesting, multiband polarization, and wide-band characteristics [2].…”