Dual-functional communication and sensing antenna system

Abstract

In this article, a dual functional antenna system for communication and sensing applications is designed on a single substrate having a common input port. The main motivation behind the proposed design is to build an antenna system, which can work as an antenna sensor and also can communicate over a fixed band not related to the resonance frequency shifts of the antenna sensor. The dual functionality of the system has been achieved by designing a frequency selective multipath filter (FSMF). The FSMF has an input port and two output ports. Both the communicating and sensing antennas are integrated on the output ports of the FSMF. The FSMF ensures minimum effect of the antennas on each other’s performance. The performance of the antenna sensor is first shown by characterizing different standard substrates with $${\varepsilon} _r=2.2$$ ε r = 2.2 to 6.15 and then demonstrated for ice and water detection. The communicating antenna is used for Wi-Fi (2.45 GHz) applications. The simulated and measured results of the dual-functional antenna systems are in good agreement. The proposed design is fabricated on a PCB with $${\varepsilon} _r=3.5$$ ε r = 3.5 and $$\tan \delta =0.0027$$ tan δ = 0.0027 with an overall size of $$86.7\times 26\times 0.8\,\text {mm}^3$$ 86.7 × 26 × 0.8 mm 3 .

Nanosilver Inkjet-Printed CPW-Fed Flexible Antenna Sensor for Contactless Liquid Acetone/Water Detection

“…Among the FR1 frequency bands, n79 has become one of the most promising candidates for future mobile applications and has been extensively studied by many researchers [67], [68]. We can also use this frequency band for antenna sensor development, paving the way for the proposed sensor to be used in existing wireless systems [14], [69].…”