Design of Differentially Fed CP Circular Slot Antenna

This paper proposes a differentially fed antenna of circular polarization. The antenna is composed of a circular slot and two oppositely deployed semi-circular feeding metal strips. The circularly polarized (CP) antenna is designed in a rotationally symmetric fashion to give good differential-mode (...

Full description

Saved in:
Bibliographic Details
Published in2019 IEEE Asia-Pacific Microwave Conference (APMC) pp. 825 - 827
Main Authors Chen, Hsun-Hsiang, Lu, Guan-Yu, Lin, Yo-Yu, Lee, Ching-Her
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2019
Subjects
Antenna measurements
axial ratio
Broadband antennas
circular slot antenna
common-mode suppression
differentially fed
Dipole antennas
Metals
Microstrip antennas
Slot antennas
Online AccessGet full text

Cover

More Information
Summary:This paper proposes a differentially fed antenna of circular polarization. The antenna is composed of a circular slot and two oppositely deployed semi-circular feeding metal strips. The circularly polarized (CP) antenna is designed in a rotationally symmetric fashion to give good differential-mode (DM) performance and high common-mode (CM) suppression. The circular slot antenna is loaded with stubs for tuning impedance matching and CP characteristic. A fabricated prototype circuit of the proposed differentially fed CP antenna was measured, and results show that the CP antenna has a 10-dB DM passband of 2.33-2.72 GHz and a 3-dB DM axial-ratio band of 2.38-2.51 GHz. In addition, within the passband, the CM signals can be effectively rejected since the CM return loss is less than 0.77 dB; the DM-to-CM conversion is negligible because it is smaller than -43.25 dB.
DOI:10.1109/APMC46564.2019.9038752