Also known as a Surface-Mounted Device (SMD) Antenna, a DRA is a type of radio frequency antenna that utilises a piece of dielectric material to radiate or receive signals. Unlike conventional antennas that use metal elements to resonate at a specific frequency, DRAs use the resonant properties of the dielectric material itself to achieve the same effect. This design allows for a compact size and low weight while providing excellent performance and efficiency. It also minimises interference and signal loss often associated with metal-based antennas. Given these advantages, DRAs are commonly found in modern wireless communication devices and systems, such as mobile phones and Wi-Fi equipment.
Inverted-F Antenna
This is a type of PCB-mounted antenna that is essentially a variation of the common half-wave dipole antenna, but with one arm folded over to form an 'inverted-F' shape. This unique configuration provides compactness while maintaining good radiation efficiency, making IFAs particularly suitable for space-constrained applications. The inverted-F design also allows for a degree of frequency tuning, meaning the antenna's operating frequency can be adjusted to some extent during the design phase. Because of these properties, IFAs are commonly used in portable wireless devices, including mobile phones and Wi-Fi devices.