分类: 地球科学 >> 空间物理学 提交时间: 2017-03-10
摘要: This paper present a design for X/Ku dual-band reflectarray antennas with single layer which has two independent radiation patterns for X and Ku bands. In the design, a novel dual resonance structure has been used as the unit cell for both X and Ku band to achieve dual-band performance with a new approach. A 10�0 center-fed reflectarray operating at 9 GHz and 13.5 GHz with scattering angles of 12�and -30�respectively, is designed and the simulated results are presented to validate the approach.
分类: 地球科学 >> 空间物理学 提交时间: 2017-03-10
摘要: A novel X-band unit cell structure with improved bandwidth performance for single-layer microstrip reflectarray antenna is proposed. The new element structure consists of two circular rings, each with a pair of gaps, and two phase-delay lines are attached to the outer ring to provide the required phase shift. A 9� center-fed reflectarray antenna operating at 10 GHz is designed to validate the broadband performance of the proposed unit cell. Simulated results show 20% 1-dB gain bandwidth and 38.5% 3-dB gain bandwidth. The maximum gain at 10 GHz is 20.1 dB, which is equivalent to 40 % efficiency.