Title :
Performance of Coupled-Oscillator Arrays With Angle-Modulated Injection Signals
Author :
Collado, Ana ; Georgiadis, Apostolos
Author_Institution :
Centre Tecnol. de Telecomunicacions de Catalunya, Castelldefels, Spain
Abstract :
A nonlinear analysis of coupled-oscillator systems under modulated inputs is presented. Angle modulation is introduced to the array by injection locking one of the oscillators to an external modulated reference signal. Envelope transient analysis is used to investigate the effect of the modulation versus scanning angle. Furthermore, a simplified model for the array is provided based on a perturbation of the single-oscillator free-running steady state. In addition, arrays transmitting at the second harmonic are also examined, allowing for extended scanning range. Results are verified by measuring the performance of a fabricated two-element array operating at 4.5 GHz.
Keywords :
angle modulation; injection locked oscillators; transient analysis; angle modulation; angle-modulated injection signals; coupled-oscillator arrays; coupled-oscillator systems; envelope transient analysis; external modulated reference signal; injection locking; nonlinear analysis; second harmonic; Couplings; Frequency; Injection-locked oscillators; Phase modulation; Phase shifters; Phased arrays; Read only memory; Signal analysis; Steady-state; Transient analysis; Beam steering; coupled-oscillator arrays (COAs); envelope transient (ET); harmonic balance (HB); injection; injection locking; modulation;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2010.2043162
