Ammann, "Differentially-fed omnidirectional circularly
polarized patch antenna for RF energy harvesting," in 2016 10th European Conference on Antennas and Propagation (EuCAP), pp.
When the threshold value for the axial ratio of circularly
is generally considered as 3 dB, the designed antenna can be said to provide good circular polarization performance over the full azimuth plane and 65 degrees beamwidth in the elevation plane both for simulation and measurement results.
Engineering prototype of the shared-aperture dual circularly
polarised microstrip antenna has been fabricated using 20 mil Rogers substrates and experimentally evaluated.
Fu, "A low cost miniaturized circularly
polarized antenna for UHF radio frequency identification reader applications," Microwave and Optical Technology Letters, vol.
These findings are likely to be useful for the structural analysis of biological molecules  and spin-polarized photoemission spectroscopy , which require circularly
polarized emitters in the vacuum-ultraviolet frequency region.
Caption: Image displayed using circularly
Antennas are circularly
polarized if the value of the axial ratio is less than 3 dB, and for an ideal circularly
polarized antenna the axial ratio should be 0 dB.
This study is composed of the following: Section 1 describes the design of circularly
polarized antennas with an isotropic pattern for UHF RFID readers of WSN, Section 2 describes the design, manufacture, and simulation of the antennas for readers, Section 3 measures the parameters of the antennas manufactured and their performance, and Section 4 concludes the antennas designed.
In this paper, two designs of dual-band dual-sense circularly
polarized slot antenna are proposed based on a construction of concentric deformed annular slots with a stepped microstrip feed line.
Pozar, "Design of wideband circularly
polarized aperture-coupled microstrip antennas," IEEE Transactions on Antennas and Propagation, Vol.
Therefore, for solving the blackout problem, it is significant to study the effects of external magnetic field on propagation of right-hand circularly
polarized electromagnetic wave in plasma.
Recently, dual-band circularly
polarized (CP) microstrip antennas have received much attention in the field of wireless communications.