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Reflectarray antennas combine the advantages of both reflector and phased array antennas. Therefore, they offer low-loss, low-cost solutions for the high gain, beam steering and beam shaping applications. First the current progress and future perspectives regarding the design and analysis of reflectarrays are discussed. Then, recent technological developments and techniques that are used to realize...
This paper presents millimeter wave phased array antenna for short range communication applications at 35 GHz. The antenna array is formed by 1 × 16 microstrip antipodal tapered slot antennas each connected to RF MEMS phase shifters for beam steering. The simulation and measurement results of the single antenna element are presented and the phase shifter structure to be used in the array is described...
In the last years, MEMS switches have been gathering an increasing interest for their exploitation in several electrostatic and RF applications. In this paper we discuss about the enhancement of dielectric's reliability in MEMS by embedding an array of Carbon Nanotubes (CNTs) which allows the reducing of the breakdown threshold and, hence, to improve the device capabilities even in presence of high...
This paper presents the first 4-element base-station antenna that is passively scanned using low-loss RF MEMS phase shifters. The design is based on packaged RF MEMS SPDT switches, which are capable of handling Watts of RF power with high reliability. The results agree very well with simulations and show pattern scanning to 9 with a measured gain of 8.6–8.3 dB at 2 GHz. The array is capable...
An analog tunable phase shifter is demonstrated that uses MEM elements in the ground plane below a microstrip transmission line. Meander-ribbon MEM elements in the ground plane form a defected ground structure. Electrostatic actuation of the ribbon array introduces an air gap between the RF substrate and ground plane, enabling phase control. Device performance is simulated and measured at 50 GHz for...
This paper evaluates the impact of the newest micro & nanotechnologies on smart antenna systems. After analyzing the key features of the main mobile wireless systems of the present - UMTS, CDMA2000, WiMax 802.16e, and MBWA 802.20, we have identified some common issues, requirements and limitations. Dwelling on the SDC -Software-Defined Component perspectives we have analyzed the impact of novel...
This paper reports on the analysis of technologies opening avenues for potential technological breakthroughs in phased array antennas. We will report on recent results on the insertion of hardware technologies such as RF MEMS and RF Photonics, in the front end of phased array antennas. Future prospects for the insertion of nanotechnologies will be also presented.
We present a system concept for a Ka-band multi-functional electronically steerable antenna (ESA) on a small UAV that is based on using sub-arrays with low-loss RF MEMS phase shifters. Our analysis shows that low phase shifter losses are critical if the dissipated radar hardware DC power should fit within the given requirements. The results presented in this paper also indicate that adequate performance...
This report summarizes some of the recent results at FOI with respect to multi-band and reconfigurable front-ends for flexible and multi-functional RF systems. Firstly, we report on a frequency agile X-band smart skin digital beamforming antenna based on using an 8-10 GHz tunable active filter and an image rejection mixer in a receiver GaAs MMIC. Secondly, we have also investigated the possibility...
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