<title>Overview of optically driven antenna systems</title>

Abstract

In this paper, simple methods to obtain phase shifts and an amplitude regulation using electro-optical technique, with purpose to drive antenna array systems, are presented. This solution comprises true-time delay properties of the optics fiber, driven by tuneable lasers. In the following overview, several techniques proposed by different authors are presented. All methods are based on the same idea, which consists on setting the radiofrequency (RF) signal phase and amplitude in the optical domain instead of using radiofrequency techniques. Trough the electro-optical conversion the RF signal is transferred onto an optical carrier, where it can be influenced to achieve the desired result.

Centimeter positioning accuracy in modern wireless cellular networks – wish or reality?

“…x d D § • ¨© ¹ (10) where d is the distance between the receiver and each transmitter, x is the fixed distance between the transmitters, and α is the angle at which the receiver sees both transmitters. The position error δp is determined by equation (11). The expression can be simplified due to the small value of the error:…”

An Investigation on the performance of receiving Optical Beam-Forming Networks

“…Many Optical Beam-Forming Networks (OBFN), have been proposed as promising solutions especially in transmitting arrays [2,3]. The authors found few reports to discuss the performance of OBFNs in receive mode [4,5].…”

Effects of group delay ripple on optical beam-formers for pulsed antenna arrays

“…One should modulate a number of optical carriers with the radio frequency (RF) signals, pass them through the time delay elements and demodulate the optical signals to get the delayed RF signals. Fiber Bragg grating (FBG) is frequently used as an optical TTD element (Tur 2009;Ritosa and Batagelj 2008). Both single channel and multichannel implementations are presented in the literature.…”