Effect of Bended Feeding Line to the Axial Ratio on Circular Patch Antenna with Triangle Truncated

摘要

The Study of the X-band circularly polarized antenna with circle-shaped microstrip patch and triangular truncation factor is discussed in this manuscript. The total dimension of the single patch is less than 40mm × 40mm and the maximum thickness of the proposed antenna is 10mm. This single patch antenna developed in the double layer of substrates NPC-H220A with thickness 1.6mm and the dielectric constant 2.17. The feeding line developed in the middle part between first layer and second layer, the feed-line will be the focus of discussion of this manuscript. In this Proposed antenna, the feeding line designed with bended method, this style produced excellent circular polarization characteristics. The Axial ratio obtained of 0.49GHz with low frequency stand at 7.96GHz while the hing frequency stand at 8.45GHz. The minimum requirement of the antenna design are 0.4GHz of the bandwidth, then the resonant frequency at 8.2GHz.