Research Article

A Compact Single-Feed Circularly Polarized Microstrip Antenna with Symmetric and Wide-Beamwidth Radiation Pattern

Figure 3

Effect of the bottom length of the trapezoid on the reflection coefficient, gain, and axial ratio of the antenna.
106516.fig.003a
(a) Reflection coefficient S 11
106516.fig.003b
(b) AR and RHCP gain