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462 Appendix G<br />

G.3.<br />

Passband<br />

Q<br />

_ (QLN F,)<br />

LN- F '<br />

,<br />

X= {p,<br />

d,<br />

not undercoupled,<br />

undercoupled.<br />

(G.34)<br />

G.3.1.<br />

Narrow-Band Approximation<br />

j=i+ I,<br />

~woL<br />

Wo IJ<br />

i= I, ...,N-I (prototype). (G.35)<br />

for inverter L,<br />

for inverter C,<br />

(G.36)<br />

LC trap at w=w n •<br />

G.3.2.<br />

Loss Effects<br />

Note: For overcoupled, even N, add<br />

, L p<br />

= 10 loglO( 1+.') dB.<br />

(G.37)<br />

G.3.3.<br />

Stopbands<br />

(G.38)<br />

L,(f)" -6.+ DBl +DB2+ DB3+DB4+DB5;> 20dB. (G.39)<br />

Note: For overcoupled, even N, add 101og,ogN+"<br />

Calculate each <strong>of</strong> the following subheadings in reverse order, starting with<br />

G.4.4 and working backward through G.4.1. Repeat for each L,(f,), but use<br />

L,(fd for each trap.<br />

G.4.I. Loaded-Q Product<br />

t:.<br />

llQL = QLlQL2 .. ·QLN·<br />

(G.40)<br />

_ ( llQL )'/N<br />

QLN- ---<br />

llQLN<br />

llQ 'I DBl<br />

L = ant] oglO20'<br />

DBI =L K<br />

+6-DB2- DB3- DB4- DB5.<br />

Note: For overcoupled, even N, subtract lOloglogN+lo<br />

(G.4I)<br />

(G.42)<br />

(G.43)

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