Antipodal Vivaldi Antenna for Water Pipe Sensor and Telemetry

Figure 7

Realised gain and fidelity factor comparison at 7.5 GHz in the range 60^∘≤𝜃≤70^∘ of antenna conformal to pipe configurations (a)–(d) without water (black trace) and with water (red trace).

(a)

(b)

(c)

(d)