Title : 
Conrad´s rule for phase-modulation spectra
         
        
        
            Author_Institution : 
University of St. Andrews, Wolfson Institute of Luminescence, Department of Physics, St. Andrews, UK
         
        
        
        
        
        
        
            Abstract : 
A simple two parameter expression is derived for the spectral density resulting from phase modulation by a Gaussian signal. The effective bandwidth is not as given by Conrad´s rule.
         
        
            Keywords : 
phase modulation; Conrad´s rule; Gaussian signal; effective bandwidth; phase modulation; phase modulation spectra; spectral density; two parameter expression;
         
        
        
            Journal_Title : 
Electronics Letters
         
        
        
        
        
            DOI : 
10.1049/el:19800004