Electro-optic wireless millimeter-wave-lightwave signal converters using planar Yagi-Uda array antennas coupled to resonant electrodes

2012 ◽  
Author(s):  
Y. N. Wijayanto ◽  
H. Murata ◽  
Y. Okamura
Keyword(s):  
Millimeter Wave ◽  
Array Antennas ◽  
Electro Optic

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.

Wireless space-division-multiplexed signal discrimination device using electro-optic modulator with antenna-coupled electrodes and polarization-reversed structures

2012 ◽  
Vol 4 (3) ◽  
pp. 399-405 ◽  
Author(s):  
Hiroshi Murata ◽  
Ryota Miyanaka ◽  
Yasuyuki Okamura
Keyword(s):  
Millimeter Wave ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Signal Discrimination ◽  
Electro Optic ◽  
Optical Crystals ◽  
Angle Difference ◽  
Irradiation Angle ◽  
Electro Optic Modulator

Millimeter-wave wireless space-division-multiplexing signals were discriminated by a newly developed electro-optic modulator using an array of antenna-coupled electrodes and polarization-reversed structures of ferroelectric optical crystals. Discrimination with channel isolation over 13 dB was obtained for two 38 GHz wireless signals with an irradiation angle difference of 15° by use of a fabricated device 30 mm in length.

Millimeter-wave phased-array antennas

2008 ◽  
Author(s):  
Enzo Carpentieri ◽  
Ugo F. D'Elia ◽  
Emilio De Stefano ◽  
Lucia Di Guida ◽  
Roberto Vitiello
Keyword(s):  
Millimeter Wave ◽  
Phased Array ◽  
Phased Array Antennas ◽  
Array Antennas
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