[数值]15 Coupled Rectimguiar Bars Between Parallel Plates

Coupled Rectimguiar Bars Between Parallel Plates* L@JOGCYy  
WILLIAM J. GETSINGER~, MEMBER, IRE =IAsH85Q  
Summar~—Curves are presented giving the even-mode fringing :!zl^J;  
capacitance, the odd-mode fringing capacitance, and the difference 5q"ON)x  
between odd- and even-mode fringing capacitances for wide ranges QRLt9L  
of thickness and spacing of rectangular bars centered between parallel Vf(6!iRP@  
plates. Simple formulas are given relating these capacitances to _G1gtu]  
even- and odd-mode characteristic impedances of coupled rectangular };'\~g,1  
bars. Possible applications to strip-line and other circuits are described. Z,iHy3`  
The Appendix gives the derivation of the fringing, capacitances by YJ(*wByM  
conformal mapping techniques. The results are exact for bars extendti, jY_T/233d  
g in width infinitely far from the coupling region, and have only
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small error (less than 1.24 per cent) for bars whose width k .. Fs[aa#v4B  
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