I've usually heard that the length of antennas in radio receivers need be a substantial fraction of wavelength.
Then ,say FM wave of frequency of 100MHz has a wavelength of 3 m. Then how come mobile phones of length ,say 6 cm , which is 1/50th of the wavelength recieve radio waves properly ?
Then ,say FM wave of frequency of 100MHz has a wavelength of 3 m. Then how come mobile phones of length ,say 6 cm , which is 1/50th of the wavelength recieve radio waves properly ?