A high-performance compact ultra-wideband antenna covering 3.33–15.81 GHz and 35.58–45.38 GHz for advanced wireless applications
摘要
This paper presents the design, optimization, and performance assessment of a compact ultra-wideband (UWB) patch antenna realized on a Rogers RT5880(lossy) substrate with an overall dimension of 20 × 28 × 0.8 mm3. The proposed antenna operates efficiently over two wide frequency region extending from 3.33 to 15.81 GHz and 35.58–45.38 GHz, while maintaining a VSWR ≤ 2 across both operating region. The antenna exhibits an excellent impedance response, achieving a minimum coefficient of -47.59 dB at 10.85 GHz and a secondary resonance peak of 46.02 dB at 6.88 GHz. Furthermore, the antenna attains an overall radiation efficiency exceeding 90%, with a maximum efficiency of 96.82% at 12.45 GHz. The realized gain varies from 2.52dBi at 4.45 GHz to a maximum of 8.39dBi at 38 GHz, while the directivity increases from 2dBi at 3.8 GHz to 8.52dBi at 38 GHz. These findings substantiate that the proposed antenna delivers high efficiency, stable radiation characteristics, and substantial gain, rendering it a promising candidate for wideband and millimeter-wave wireless communication systems.