Frequency Characteristics of a Beamforming Network of an Optically Controlled Array Antenna and Its Radiation Pattern Measurements

Kenichi YAMADA  Isamu CHIBA  Yoshio KARASAWA  

IEICE TRANSACTIONS on Electronics   Vol.E79-C   No.1   pp.68-73
Publication Date: 1996/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Optomicrowave Techniques and Their Applications)
Category: Optically Controlled Beam Forming Networks
optically controlled array antenna,  two-laser type,  fiber array,  Fourier transform,  

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As an optically controlled array antenna, a "two-laser type" using two laser diodes whose frequency difference is set to the desired microwave frequency has been proposed. In this paper, we confirm experimentally that the beamforming network of the two-laser type array antenna has very broadband characteristics by measuring the amplitude and phase of microwave signals at 1.5 GHz, 10 GHz and 20 GHz. Using the optically controlled beam forming network, the radiation pattern of a 4-element linear array antenna was measured at 1.5 GHz.