Three-dimensional microfabricated broadband patch antenna for WiGig applications
Hunerli, H. V.
Cetiner, B. A.
IEEE Antennas and Wireless Propagation Letters
828 - 831
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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.