Performance Analysis of a Compact Conformal SWB Antenna for 5G and Wearable IoT Applications

Abstract

Abstract This paper focused on the design and practical implementation of a compact arrowhead slot Super Wide Band (SWB) antenna on a semi-flexible substrate for a wide range of applications. A tapered feed circular monopole antenna with an arrowhead-shaped slot structure is designed on RT/Duroid substrate with a compact physical dimension of 22 × 28 × 0.508 mm3. The impedance bandwidth of the proposed antenna is 95.93 GHz (3.1-99.17 GHz) with a peak gain of 6.91 dBi. The proposed antenna has a fractional bandwidth of 187% with a high Bandwidth Dimension Ratio (BDR) of 3049 which makes the proposed antenna suitable for a wide range of applications. The proposed antenna compactness is theoretically verified with the help of the fundamental dimension limit theorem. For wearable IoT applications compactness, conformal and bending capabilities of materials are essential and hence the proposed antenna is also tested under different bending conditions and achieved a minor effect on the antenna performance. Further in order to observe the signal correlation, the time domain analysis using similar antennas in face-to-face and side-to-side scenarios has been also analyzed. The simulated results of the proposed antenna exhibit good agreement with the experimental results of the prototype model antenna.

Keywords

• BDR
• Conformal
• Fundamental dimension limit theorem
• SWB