1. An antenna with a gain of 3 dBi is in a region where incident power density is 1 microwatt per square meter. Calculate the voltage across the matched input resistance of the receiver fed by the antenna. The frequency is 900 MHz and the radiation resistance is 9 Ohms.
2. A 870 MHz base station antenna array has vertical dimension of 2.5 m and horizontal dimensions of 0.4 m. What is the maximum possible gain?