Super-wide impedance bandwidth planar antenna for microwave and millimeter-wave applications
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A feasibility study of a novel configuration for a super-wide impedance planar antenna is presented based on a 2 × 2 microstrip patch antenna (MPA) using CST Microwave Studio. The antenna comprises a symmetrical arrangement of four-square patches that are interconnected to each other with cross-shaped high impedance microstrip lines. The antenna array is excited through a single feedline connected to one of the patches. The proposed antenna array configuration overcomes the main drawback of conventional MPA with a narrow bandwidth that is typically <5%. The antenna exhibits a super-wide frequency bandwidth from 20 GHz to 120 GHz for S11 < -15 dB, which corresponds to a fractional bandwidth of 142.85%. The antenna¿s performance of bandwidth, impedance match, and radiation gain were enhanced by etching slots on the patches. With the inclusion of the slot, the maximum radiation gain and efficiency of the MPA increased to 15.11 dBi and 85.79% at 80 GHz, which showed an improvement of 2.58 dBi and 12.54%, respectively. The dimension of each patch antenna was 4.3 × 5.3 mm2. The results showed that the proposed MPA is useful for various existing and emerging communication systems such as ultra-wideband (UWB) communications, RFID systems, massive multiple-output multiple-input (MIMO) for 5G, and radar systems. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
array antenna microstrip patch antenna (mpa) millimeter-wave band multiple-output multiple-input (mimo) radar radio frequency identification (rfid) systems simplified composite right/left-handed metamaterial (scrlh mtm) slot antenna 5g mobile communication systems antenna arrays bandwidth etching impedance matching (electric) microwave antennas millimeter waves mimo radar mobile antennas radar radar antennas radio frequency identification (rfid) slot antennas ultra-wideband (uwb) array antennas composite right/left-handed metamaterial micro-strip patch antennas millimeter-wave band multiple inputs microstrip antennas