Result Details
Low-Profile Circularly Polarized Antenna Exploiting Fabry-Perot Resonator Principle
Raida Zbyněk, prof. Dr. Ing., UREL (FEEC)
Láčík Jaroslav, doc. Ing., Ph.D., UREL (FEEC)
We designed a patch antenna surrounded by a mushroom-like electromagnetic band-gap (EBG) structure and completed it by a partially reflective surface (PRS). EBG suppresses surface waves and creates the bottom wall of the Fabry-Perot (FP) resonator. PRS plays the role of a planar lens and forms the top wall of the FP resonator. The novel PRS consists of a two-layer grid exhibiting inductive and capacitive (LC) behavior which allows us to obtain a reflection phase between –180° and +180°. Thanks to this PRS, we can control the height of the cavity in the range from λ/2 to λ/300.
Obtained results show that the FP resonator antenna enables us to achieve a low profile and a high-gain. The patch is excited by a microstrip transmission line via the cross-slot aperture generating the circular polarization.
Functionality of the described concept of the FP antenna was verified at 10 GHz. The antenna gain was 15 dBi, the impedance bandwidth 2.3% for |S11| < –10 dB, and the axial ratio bandwidth 0.6% for AR < 3.0 dB. Hence, the antenna is suitable for narrowband applications.
Computer simulations show that the microwave FP antenna can be simply redesigned to serve as a source of circularly polarized terahertz waves.
High gain antenna; Fabry-Perot resonator; terahertz source; partially reflective surface; mushroom-like electromagnetic band-gap structure; circular polarization.
@article{BUT118083,
author="Kamil {Pítra} and Zbyněk {Raida} and Jaroslav {Láčík}",
title="Low-Profile Circularly Polarized Antenna Exploiting Fabry-Perot Resonator Principle",
journal="Radioengineering",
year="2015",
volume="24",
number="4",
pages="898--905",
doi="10.13164/re.2015.0898",
issn="1210-2512"
}