Wideband and high-gain negative-feedback AGC amplifier for high-speed lightwave digital transmission systems

1985 ◽  
Vol 21 (10) ◽  
pp. 419-420 ◽  
Author(s):  
K. Yamashita ◽  
T. Kinoshita ◽  
Y. Takasaki ◽  
M. Maeda ◽  
T. Kaji ◽  
...  
Keyword(s):  
Negative Feedback ◽  
High Speed ◽  
Digital Transmission ◽  
High Gain ◽  
Transmission Systems

Analysis of timing jitter in digital transmission systems

2001 ◽  
Vol 84 (8) ◽  
pp. 1-13
Author(s):  
Kazuhiro Miyauchi ◽  
Isamu Wakabayashi ◽  
Hiroki Shibayama
Keyword(s):  
Digital Transmission ◽  
Timing Jitter ◽  
Transmission Systems

scholarly journals A Tutorial on Optical Feeding of Millimeter-Wave Phased Array Antennas for Communication Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-22 ◽  
Author(s):  
Ivan Aldaya ◽  
Gabriel Campuzano ◽  
Gerardo Castañón ◽  
Alejandro Aragón-Zavala
Keyword(s):  
Millimeter Wave ◽  
High Speed ◽  
Phased Array ◽  
Path Loss ◽  
High Gain ◽  
Interference Avoidance ◽  
Amplitude Control ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
The Impact

Given the interference avoidance capacity, high gain, and dynamical reconfigurability, phased array antennas (PAAs) have emerged as a key enabling technology for future broadband mobile applications. This is especially important at millimeter-wave (mm-wave) frequencies, where the high power consumption and significant path loss impose serious range constraints. However, at mm-wave frequencies the phase and amplitude control of the feeding currents of the PAA elements is not a trivial issue because electrical beamforming requires bulky devices and exhibits relatively narrow bandwidth. In order to overcome these limitations, different optical beamforming architectures have been presented. In this paper we review the basic principles of phased arrays and identify the main challenges, that is, integration of high-speed photodetectors with antenna elements and the efficient optical control of both amplitude and phase of the feeding current. After presenting the most important solutions found in the literature, we analyze the impact of the different noise sources on the PAA performance, giving some guidelines for the design of optically fed PAAs.

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