Which of the following are frequency independent antennas?
(a) Dielectric rod and Yagi
(b) Log-periodic and Equiangular Spiral
(c) Half-wave dipole and Half-wave slot
(d) Axial mode helix and Pyramidal horn
The question was posed to me in class test.
My doubt stems from Antenna Tradeoffs topic in division Technology Tradeoffs in Software Defined Radio of Cognitive Radio