Quad-Band Patch Antenna for Future Generations of Mobile Handsets

Abstract

The present paper introduces a novel design of a microstrip patch antenna that principally radiates at 28 GHz (as its principal or first-order resonance) and modified to operate efficiently at multiple higher-order resonances around 43, 52, and 56.5 GHz. The design method depends on the geometrical modification of the antenna structure by adding some inductively-loaded and capacitively-coupled elements to the primary patch so that it can efficiently radiate at the desired higher frequency bands. The antenna has high radiation efficiency, excellent impedance matching, and satisfactory values of the antenna gain. The patch is fabricated for experimental assessment of its performance including the impedance matching and radiation patterns. It is shown that the experimental measurements come in agreement with the simulation results over all the four operational millimetric-wave frequency bands.