Before revision: They are more expensive and complex than ordinary antennas but are being used in a few applications in which ordinary antenna designs are impractically bulky , such as antennas inside portable wireless devices, or antennas for low frequency reception that must be located indoors due to community prohibitions on outdoor antennas.
After revision: They are more expensive and complex than ordinary antennas but are being used in a few applications in which ordinary antenna designs are impractical because of their sizeincorporated , such as antennas inside portable wireless devices, or antennas for low frequency reception that must be located indoors due to community prohibitions on outdoor antennas.