This paper discusses the design of a high gain right-hand circularly polarized millimeter-wave frequency reconfigurable antenna array. The 16-element array is designed to reconfigure its operating over both K- and Ka-bands. More specifically, reconfigurability ensured through integration modified ring resonator along with array's sequentially rotated stacked feeding network. four distinct bands...

In this letter, a high-aperture-efficiency (? AP ), right-hand circularly polarized (RHCP), sequentially rotated hexagonal microstrip antenna array, working at GPS L1 band, is proposed. The proposed design placed on the top of floating sensor node for ocean and marine monitoring applications. To...

This letter describes a wideband circularly polarized (CP) array antenna with 2 × alignment of sequentially rotated CP patch elements. Each element has diamond-shaped artificial ground structure (DAGS), which extend the 3-dB axial ratio (AR) bandwidth antenna, and elements in are fed relative phases 0°, 90°, 180° 270°. The main purpose this work is to show potential AR by combination DAGS seque...

In this letter, a high-gain low-profile dual-circularly polarized (CP) leaky-wave antenna (LWA) with fixed beam is presented. The proposed LWA comprises only two-layered substrates, in which the top layer constructs annular array while bottom realizes feeding network. To obtain beam, differential excitation generated by coupler employed. Furthermore, dual-CP network provides two sequentially ro...

In today's computer systems, the disk I/O subsystem is often identiied as the major bottleneck to system performance. One proposed solution is the so-called redundant array of inexpensive disks (RAID). In this paper, we examine the performance of two of the most promising RAID architectures, the mirrored array and the rotated parity array. First, we propose several scheduling policies for the m...

This work examines the ability of a special type smart antenna array known as Switched Active Parasitic Antenna (SASPA) to produce directive and electronically steerable radiation pattern. The SASPA consists elements that are switchable between active parasitic states by using P-Intrinsic-N (PIN) diodes. element is supplied radio frequency while short-circuiting terminals an in results element....