Title :
Optimim design for a broadband microstrip balun
Author :
Bartholomew, D.M.L.
Author_Institution :
Admiralty Compass Observatory, Slough, UK
Abstract :
The letter reports calculations of Marchand balun performance which show that bandwidths approaching 50:1 (for a V.S.W.I.¿2:1) should be achievable with overlaid microstrip structures. The bandwidth limits (¿8:1) reported by previous writers appear to reflect only the inaccessibility of the true optimum to the semiempirical design methods used and the limitations of fabrication on single-thickness card. Preliminary experimental results confirm the theoretical indications.
Keywords :
strip line components; Marchand balun performance; broadband microstrip balun; optimum design; overlaid microstrip structures; stripline balancing unit;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19770371