Fig. 1
Ray tracing model of proposed antenna.
Fig. 2
Phase diagram of metamaterial unit cell.
Fig. 3
(a) Proposed geometry of unit cell, (b) Simulation of metamaterial unit cell, (c) Equivalent structure of metamaterial unit cell.
Fig. 4
(a) Magnitude and Phase of the Reflection coefficient, (b) Magnitude and Phase of the Transmission coefficient.
Fig. 5
(a) Relative Permeability vs Frequency, (b) Relative Permittivity vs Frequency ,(c) Refractive index vs Frequency.
Fig. 6
(a) Magnitude of Reflection Coefficient, (b) Magnitude of Transmission Coefficient
Fig. 7
(a) Magnitude of Reflection Coefficient, (b. Magnitude of Transmission coefficient.
Fig. 8
(a) SWB antenna, (b) Top view of Proposed antenna, (c) Prototype of Proposed antenna.
Fig. 9
(a) Antenna 1, (b) Slot dimensions, (c) Equivalent circuit diagram.
Fig. 10
Current distribution of antenna 1 at the resonating frequencies 3.8 GHz, 6.4 GHz,8.8 GHz and 10.4 GHz.
Fig. 11
(a) Layout of antenna 2, (b) Inverted U-shaped slot.
Fig. 12
(a) Layout of Antenna 3, (b) Prototype of Antenna 3, (c) Notch
Fig. 13
(a) Antenna 4 top view, (b) Array of metamaterial unit cells, (c) Geometry of proposed antenna, (d) Prototype of antenna 4, (e)Top view of prototype.
Fig. 9
(a) Antenna 1, (b) Slot dimensions, (c) Equivalent circuit diagram.
Fig. 10
Current distribution of antenna 1 at the resonating frequencies 3.8 GHz, 6.4 GHz,8.8 GHz and 10.4 GHz.
Fig. 11
(a) Layout of antenna 2, (b) Inverted U-shaped slot.
Fig. 12
(a) Layout of Antenna 3, (b) Prototype of Antenna 3, (c) Notch
Fig. 13
(a) Antenna 4 top view, (b) Array of metamaterial unit cells, (c) Geometry of proposed antenna, (d) Prototype of antenna 4, (e)Top view of prototype.
Fig. 14
Return Loss Characteristics of Intermediate stages of proposed antenna.
Fig. 15
Surface current distribution at 3.5 GHz.
Fig. 16
Surface current distribution 5.5 GHz.
Fig. 17
Radiation efficiency of Antenna 4.
Fig. 18
Radiation efficiency of antenna 4.
Fig. 19
(a)Radiation pattern with metamaterial in E and H plane at 4 GHz when d=32.5mm, (b) Radiation pattern without metamaterial in E and H plane at 4 GHz.
Fig. 20
(a) Radiation pattern with metamaterial in E and H plane at 8 GHz when d=16mm, (b) Radiation pattern without metamaterial in E and H plane at 8 GHz
Fig. 21
(a) 3D polar plot with metamaterial at 4 GHz at d=32.5mm, (b)3D polar plot without metamaterial at 4 GHz.
Fig. 22
(a) 3D polar plot with metamaterial at 8 GHz at d=16mm, (b) 3D polar plot without metamaterial at 8GHz.
Fig. 23
shows the gain vs frequency.
Fig. 24
(a) Fabricated SWB antenna, (b) Return loss characteristics in VNA, (c) Top view of antenna connected to VNA, (d) Sideview of fabricated antenna.
Fig. 25
Comparison of experimental and simulated results of proposed antenna.
Table I
Optimized Dimensions of Metamaterial
Table II
Optimized Dimensions of Proposed Antenna
Table III
Optimized Dimensions of Proposed Antenna 1
Table IV
Dimensions of First Notch
Table V
Dimensions of Second Notch
Table VI
Return Loss Characteristic Comparison at 4 Ghz
Table VII
Return Loss Characteristic Comparison at 8 Ghz
Table VIII
Comparison of the Proposed Metamaterial Based Antenna With the Existing Antennas