The 2450AT43B100E is a miniature RF ceramic chip antenna. These are made using Low Temperature Cofired Ceramic (LTCC) technology which has the ability to embed low and high dielectric constants inside the antenna. This enables them to have great detuning resilience and extreme temperature stability (approximately 2ppm) behaviour.
7020 case size
2X-3X higher dielectric constant than any FR4, PCB or standard plastics
