An electronic beam-steering antenna using a tunable FSS

Two novel FSS (frequency selective surface) systems working from 1.6 to 1.8 GHz are proposed for cellular beam-steering applications. An FSS system is comprised of metallic screens which are sandwiched by dielectric slabs. In order for the system to function as a band-pass filter, the geometry of the unit cell on the metallic screens is designed to be a slotted patch. The FSS system is capable of providing reconfigurable phase shifts for transmitted waves with the use of electronic devices in the unit cells. Therefore, it can achieve beam-steering ability if the phase differences of the transmitted waves coming out of the adjacent columns on the FSS are properly configured. A horn antenna is used as the feed to form a filtenna with the FSS system to provide high gain. Another FSS system made of dipole-patch array is also proposed. This FSS system consists of a basic set of four dipole patches and a tail patch. By adjusting the tail dimension, the FSS system allows for beam-steering ability. Compared with the slotted-patch FSS, the dipole-patch FSS has the advantages of low power consumption and low cost. The experimental and simulated results of both FSS systems are be presented.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois Urbana-Champaign

Year dc:date

2025

Author dc:creator

• Liu, Shuo

Contributors dc:contributor

• Bernhard, Jennifer T
• Schutt-Aine, Jose
• Dragic, Peter
• Zhao, Yang

• Antenna
• FSS
• Beam-steering

Statement dc:rights

• Copyright 2025 Shuo Liu

Language dc:language

en, eng

Handle dc:identifier

https://hdl.handle.net/2142/129615

OAI record oai:identifier

https://www.ideals.illinois.edu/oai-pmh?verb=GetRecord&metadataPrefix=etdms&identifier=oai%3Awww.ideals.illinois.edu%3A2142%2F129615