Wideband substrate‐integrated monopole antenna

Abstract

A coaxial probe fed wideband low‐profile electric monopole cavity antenna with measured impedance bandwidth of 56% at a central operating frequency of 8 GHz is proposed. The antenna, based on a modified shorted square patch, effectively forms a substrate‐integrated cavity with four curved radiating slots at its periphery. The concave curvature of these four radiating slots provides a magnetic current loop mode while increasing bandwidth and reducing volume of the resonator. The proposed design may be easily fed using a 50 Ω probe feed and capacitive gap, and is robust to manufacturing tolerances, as parasitic modes are not excited. The design is compatible with applications requiring a vertically polarized signal with respect to the antenna surface. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1855–1857, 2016

A wideband monopolar patch antenna with a high system fidelity factor for IR‐UWB application

“…Various techniques have been reported to achieve much larger bandwidth than conventional designs, including adding shorted metal vias, 6–8 coupling rings, 5,9,10 etching slots, 11,12 and using coupled‐fed technology 13,14 . In 2013, Liu proposed a method to control the frequencies of the $${\text{TM}}_{01}$$ and $${\text{TM}}_{02}$$ modes to achieve an impedance bandwidth of 18% 6 .…”