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A square slot circularly polarized (CP) microstrip antenna with enhanced bandwidth is presented. The proposed antenna consists of a C-shape patch and four rectangular strips around the four corners on the lower ground, and is excited by a microstrip feedline. A broadband CP antenna can be achieved by adjusting the size of the strips. The measured results of -10 db impedance bandwidth is 157.2% (2-16...
This paper presents a simple circularly-polarized traveling-wave array antenna. It uses four identical rectangular microstrip patches which are arranged in two rows of two elements to form the array. Fairly low cross-polarization radiation is achieved by exciting the two rows of traveling wave arrays with opposite feed locations and opposite phases. Measured results show that the 3-dB axial ratio...
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