1. Which of the following describes an isotropic antenna? a) A grounded antenna used to measure earth conductivity b) A theoretical antenna used as a reference for antenna gain c) A horizontally...

Extracted text: 1. Which of the following describes an isotropic antenna? a) A grounded antenna used to measure earth conductivity b) A theoretical antenna used as a reference for antenna gain c) A horizontally polarized antenna used to compare Yagi antennas d) A spacecraft antenna used to direct signals toward the earth. 2. Why would one need to know the feed point impedance of an antenna? a) To calculate the front-to-side ratio of the antenna b) To calculate the gain of the antenna c) To match impedances to minimize standing wave ratio on rans sion line d) To measure the near-field radiation density from a transmitting antenna 3. What is a folded dipole antenna? a) A type of ground-plane antenna b) A dipole configured to provide forward gain c) A dipole constructed from one wavelength of wire forming a very thin loop d) A dipole one-quarter wavelength long 4. What is meant by antenna gain? a) The final amplifier gain minus the transmission-line losses, including any phasing lines present b) The ratio of the amount of power radiated by an antenna compared to the transmitter output power c) The ratio of the signal in the forward direction to that in the opposite direction d) The ratio relating the radiated signal strength of an antenna in the direction of maximum radiation to that of a reference antenna