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phase-shifter
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New methods of reducing the phase quantization error effects on beam pointing and parasitic side lobe level of the phased array antennas
, Article 2006 Asia-Pacific Microwave Conference, APMC, Yokohama, 12 December 2006 through 15 December 2006 ; Volume 3 , 2006 , Pages 2114-2117 ; 4902339102 (ISBN); 9784902339109 (ISBN) ; Farzaneh, F ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2006
Abstract
Usually the digital phase shifters are used to steer the beam of a phased array antenna, and the accuracy of beam steering and other properties of the radiation pattern is dependent on the number of bits of the phase shifter and its resolution. In this paper the results of simulations, accomplished using a number of phase feeding methods in order to reduce the phase quantization error effects are presented and three new methods are introduced and compared with the previous works. Copyright 2006 IEICE
Output power variations in two mutually coupled microwave oscillators and the effect of non-linear reactance on the locking bandwidth
, Article IEE Proceedings: Microwaves, Antennas and Propagation ; Volume 150, Issue 2 , 2003 , Pages 61-66 ; 13502417 (ISSN) ; Farzaneh, F ; Sharif University of Technology
2003
Abstract
The locking of two mutually coupled microwave oscillators is considered. The common frequency of oscillation is obtained both without and in the presence of a non-linear reactance. The effect of the non-linear reactance on the locking bandwidth is studied. It is shown analytically that, unlike the common injection locked oscillator case, the locking bandwidth can be either increased or decreased by the non-linearity. The variations in amplitude of oscillations is investigated. It is demonstrated that the total power delivered by the active devices decreases in interinjection locked oscillators