A Broadband Antenna on Thin Film for Private LTE and 5G Wireless Communications

A thin film antenna inspired by stripline structure with a broad bandwidth is proposed. Integrated with a grounded coplanar waveguide (GCPW) as the feeding line of the stripline, this antenna features double asymmetric slots etched in the top and bottom ground planes of the stripline in order to transform a conventional stripline into a highly efficient antenna. The proposed antenna has compact dimensions of 28 mm × 6 mm (equivalent to 0.28λ₀ where λ₀ is the wavelength in free space corresponding to the lowest operational frequency) comprising five layers with a total thickness of 0.149 mm. The measured results show that the antenna could cover the frequency range of from 2.98 GHz to 5.14 GHz (fractional bandwidth of 53.2%) with high gain, efficiency and omnidirectional radiation pattern which can be a potential candidate applied for the private LTE (long-term evolution) and sub-6 GHz 5G and communication systems.