Question

Which of the following is truefor a frequency independent antenna?

(a) Dimensions of antenna are specified in terms of angles

(b) Dimensions of antenna are specified in terms of varying wavelengths

(c) The antennas have variable impedance, pattern over operating wide band frequency

(d) It does not follow Rumsey’s principle

This question was addressed to me during an online exam.

Query is from Frequency Independent Antenna topic in section Frequency Independent Antenna of Antennas

Answer 1

Right option is (a) Dimensions of antenna are specified in terms of angles

To elaborate: Rumsey’s principle states that the impedance & pattern of antenna is frequency independent if antennasize is specified in terms of angle. The Rumsey’s principle is applicable for the frequency independent antennas.The frequency independent antennas are fixed in size and operate over wide bandwidth with constant impedance, polarization and pattern.