AUTHOR(S): 

Yumi Takizawa, Atsushi Fukasawa

TITLE

Microwave Patch Antenna with Circular Polarization for Environmental Measurement

KEYWORDS

Circular polarization, Patch antenna, Axial ratio, X-band antenna, Environmental measurement

ABSTRACT

This paper proposes a novel microwave antenna for environmental measurement. This antenna is composed of three circular patches of feed and reactance patches on a ground plane. The feed patch keeps long radius resonant to low frequency fL along y axis. This patch is cut linearly at diagonal edges resonant to high frequency fH along x-axis. The reactance patch is made of a smaller circular disk for resonant to the frequency fM being set between fL and fH . By magnetic and electric coupling between the feed and the reactance patches, the phases of current iL and iH are delayed and proceeded. Circular polarization is brought by this process. 3dB axial ratio is obtained in wideband at 10GHz without higher mode between 5 ~ 15GHz.

Cite this paper

Yumi Takizawa, Atsushi Fukasawa. (2017) Microwave Patch Antenna with Circular Polarization for Environmental Measurement. Journal of Electromagnetics, 2, 1-9