[数值]15 Coupled Rectimguiar Bars Between Parallel Plates

Coupled Rectimguiar Bars Between Parallel Plates* L +.K}w  
WILLIAM J. GETSINGER~, MEMBER, IRE p|Rxy"}  
Summar~—Curves are presented giving the even-mode fringing %v~j10e  
capacitance, the odd-mode fringing capacitance, and the difference o`j%$K4?5  
between odd- and even-mode fringing capacitances for wide ranges r?/>t1Z  
of thickness and spacing of rectangular bars centered between parallel HNjkRl)QR  
plates. Simple formulas are given relating these capacitances to T*h+"TmE  
even- and odd-mode characteristic impedances of coupled rectangular Gh|1%g"gm  
bars. Possible applications to strip-line and other circuits are described. 9f,HjR
P  
The Appendix gives the derivation of the fringing, capacitances by E4y"$U%.  
conformal mapping techniques. The results are exact for bars extendti, n7<<}wcV  
g in width infinitely far from the coupling region, and have only S%xGXmZ  
small error (less than 1.24 per cent) for bars whose width k .. [TO:-8$.  
~?b(2gn  

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