KA-BAND CIRCULARLY POLARIZED HIGH EFFICIENCY WIDE BAND REFLECTARRAY USING CROSS BOW-TIE ELEMENTS

Reflectarray for K/ka-band Terminal Antenna

Different satellite systems have been defined to provide broadband communications and internet access in remote geographical areas in Ka band (20-30 GHz) [1-2], being the up-link at 30 GHz and the down-link at 20 GHz. Costeffective antennas are required for fixed and portable terminals in Ka-band. Conventional reflectors are a preferred option to maintain reduced costs. However, the different r...

Dual-band Circularly Polarized Antenna with Low Wide-angle Axial-ratio for Tri- Band Gps Applications

This paper presents the design of a dual-band microstrip antenna with low wide-angle axial-ratio. The antenna is designed for global positioning satellite operations at 1227MHz (L2), 1575 MHz (L1) and 1176 MHz (L5, available after 2007). This antenna has another advantage of a much wider band in both VSWR and 3 dB axial-ratio compared with single-fed GPS antennas. Details of the design, simulat...

Single-Layer Multi-band Circularly Polarized Reflectarray Antenna: Concept, Design, and Measurement

This paper presents a single layer multi-band reflectarray antenna with circular polarization. The antenna geometry and operation principles are described. The reflectarray design procedure, including antenna elements and offset feed, is illustrated in details. An X band reflectarray prototype is fabricated and measured in the near field system, which realizes a 30.4 dB gain, 53.7% efficiency, ...

Optically reconfigurable unit cell for Ka-band reflectarray antennas

High Performance Dual Circularly Polarized S- Band Feed

A high performance feed for 11 meters dual shaped reflector system is designed, developed and tested. It is a dual circularly polarized monopulse tracking feed with a measured axial ratio of 0.5dB over the required frequency band of 2GHz to 2.3GHz (Uplink: 2.02GHz -2.12GHz, Downlink: 2.2GHz-2.3GHz). This feed consists of four high performance Teflon dielectric radiating elements. Each dielectri...