Title :
Comments on "A New Concept for Broadbanding the Ferrite Substrate Circulator Based on Experimental Modal Analysis" [Letter]
Author :
March, Stephen ; Miura, Tsuyoshi ; Hashimoto, Toshikazu
Abstract :
In the above paper the authors concluded, from a modal analysis of microstrip ferrite circulators, that the combination of two adjacent modes should be used for broad-banding circulators, which do not require quarter-wavelength matching transformers. Upon careful examination of their results, it can be shown that Miura and EIashimoto actually produced conventional below resonance circulators---transformers included.
Keywords :
Ferrites; Magnetic separation; Microstrip; Microwave integrated circuits; Microwave theory and techniques; Modal analysis; Resonant frequency; Saturation magnetization; Transformers; Transmission line theory;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.1974.1128168
