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Alibakhshikenari, Mohammad, Virdee, Bal Singh, See, Chan, Abd-Alhameed, Raed, Falcone, Francisco and Limiti, Ernesto (2018) Mutual-Coupling Reduction in Metamaterial Substrate Integrated Waveguide Slotted Antenna Arrays Using Metal Fence Isolators for SAR and MIMO Applications. In: 12th Int. Congress on Artificial Materials for Novel Wave Phenomena – Metamaterials 2018 Espoo, Aug. 27 th – Sept. 1st, 2018, Finland.
A new type of mutual coupling reduction technique is applied to metamaterial substrate integrated waveguide (SIW) slotted antennas array. The circular shaped reference SIW antenna is constructed from Alumina substrate with dimensions of 40×5×1.5 mm3. Embedded in the reference antenna is an array of 38 slots with dimensions of 2×1×1.5 mm3. The reference SIW antenna covers six frequency bands from X- to Ku-bands with maximum and average isolation between the radiation slots of approximately -20 dB and -10 dB, respectively. Isolation was increased by inserting metal fences between the radiation slots, which also improves the antenna’s impedance matching properties. Maximum, minimum, and average suppression on mutual coupling between radiation slots after application of the metal fences are 20 dB, 8 dB, and 13 dB, respectively. The proposed metal fence isolators (MFI) improve the radiation patterns without degrading the antenna’s performance. With MFI the maximum gain achieved improves by ~10%. The technique is simple to implement and proposed for synthetic aperture radar (SAR) and multiple input multiple output (MIMO) applications.
Available under License Creative Commons Attribution Non-commercial No Derivatives.
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