Three-dimensional microfabricated broadband patch antenna for WiGig applications
Hunerli, H. V.
Cetiner, B. A.
IEEE Antennas and Wireless Propagation Letters
Mopidevi, H., Hunerli, H. V., Cagatay, E., Biyikli, N., Imbert, M., Romeu, J., ... & Cetiner, B. A. (2014). Three-Dimensional Microfabricated Broadband Patch Antenna for WiGig Applications. Antennas and Wireless Propagation Letters, IEEE, 13, 828-831.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12789
The design, microfabrication, and characterization of a broadband patch antenna capable of covering the entire IEEE 802.11ad (WiGig) frequency band (57-66 GHz) are presented in this letter. A conductor-backed (CB) coplanar waveguide (CPW)-fed loop slot couples the energy to the patch antenna, resulting in a broad bandwidth. The feed circuitry along with the loop is formed on a quartz substrate (εr = 3.9, tan δ = 0.0002 at 60 GHz), on top of which an SU-8-based three-dimensional (3-D) structure with air cavities is microfabricated. The patch metallization is deposited on top of this 3-D structure. While the main role of the structure made out of SU-8 material is to provide a mechanical support for the patch metallization, the antenna takes advantage of the air cavities underneath, thus resulting in an antenna substrate with a very low loss. This, in turn, improves the overall antenna performances. The simulated and measured impedance characteristics agree well, showing ~15% bandwidth. Also, the radiation pattern results demonstrate the integrity of radiation pattern with reasonably constant gain values (average ~6.4 dB) in the broadside direction over the entire WiGig band.