Mutual Coupling Suppression Between Two Closely Placed Microstrip Patches Using EM-Bandgap Metamaterial Fractal Loading

Abstract

An approach is proposed to reduce mutual coupling between two closely spaced radiating elements. This is achieved by inserting a fractal isolator between the radiating elements. The fractal isolator is an electromagnetic bandgap structure based on metamaterial. With this technique, the gap between radiators is reduced to ∼0.65λ for the reduction in the mutual coupling of up to 37, 21, 20, and 31 dB in the X-, Ku-, K-, and Ka-bands, respectively. With the proposed technique, the two-element antenna is shown to operate over a wide frequency range, i.e.,

Application of metamaterials for performance enhancement of planar antennas: A review

“…The coming into existence of metamaterials has encouraged researchers and scientists in the area of electromagnetic theory in relation to radiation and propagation phenomena towards the design and fabrication of devices for various applications such as couplers, [41][42][43] phaseshifters, 44,45 imaging systems, 46 radar, 47 satellite, 48,49 seismic protection, 50 absorbers, 51 lens, 52,53 filters, 54 sensors, 55 electromagnetic cloaks, 31,51 and antennas. [56][57][58][59][60][61][62][63][64][65][66][67][68][69][70] The metamaterial field also has research dimensions in materials science, acoustics, and thermodynamics 71 in addition to the electromagnetics prospect. In this work, emphasis has been given only for the application of metamaterial and its derivatives such as metasurface, artificial magnetic conductor (AMC), and frequency selective surface for performance enhancement of patch antenna.…”

Design of SWB MIMO Antenna with Extremely Wideband Isolation

“…All these techniques have been employed to reduce coupling in the range 3.1 GHz-10.6 GHz. Further, mutual coupling reduced by metamaterial in [30][31][32][33][34][35][36][37][38][39] and [40][41][42][43]. Most of these antennas possess large dimensions, have low isolation enhancement and low %BW and gain.…”

Metamaterial‐inspired low‐profile high‐gain slot antenna

“…Metamaterial has some unusual and interesting properties, 7 which can be used for the improvement of different antenna parameters. For example, impedance bandwidth, [8][9][10][11] side-lobe levels, isolation in MIMO antennas, [12][13][14] crosspolarization, 15 antenna gain [15][16][17][18][19][20] can be improved by exploiting various properties of MTMs. In, ref.…”