The research provided in this thesis focuses on the development of the novel additively manufactured antennas using the additive 3-D and material inkjet printing fabrication as well as the conventional subtractive manufacturing by using milling machine for the compact Internet of Things (IoT) and wearable applications. The initial part of the work focuses on the different ways of fabrication of the additively manufactured antenna that includes Finite Deposition Method (FDM) and PolyJet 3-D printing technique for the substrate material fabrication. And the material inkjet printing for the conductive radiating antenna element fabrication. The document discusses the unconventional issue of the surface roughness in the 3-D printed substrates materials. The later part focuses on the designing and testing techniques for the compact electrically small antennas (ESA) for the compact IoT applications.