By G. Matthaei, E.M.T. Jones, L. Young
No microwave engineer's library is entire with no this complete 1100 web page quantity - broadly thought of to be the main necessary microwave layout reference ever released. The publication info basic ideas, innovations, and knowledge of common use within the layout of a variety of constructions. furthermore, really good facts is featured which makes it effortless to see useful, particular designs. 1000's of equations, pictures, and tables current the information you wish at a look. An critical engineering software!
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Additional resources for Microwave Filters, Impedance-Matching Networks, and Coupling Structures (Artech Microwave Library)
06, one way in which the pass-band responsc of constant-k filters can be improved is to use m-derived half sections at the ends. 6 will cause Z I T . or Z I T " to give the best approximation of a constant resistance in the pass band, and hence will cause the ends of the filter to give the best match to resistor terminations. As an example, Fig. 08-1 shows the normalized filter structure in Fig. 06-4(b) with matching sections added to improve the pass-band match to the one-ohm terminations shown.
0 8 - 4 , t h e y w i l l be a p p r o x i f o r c e d a t f r e q u e n c i e s f b a n d f3,,,2 mately s a t i s f i e d b e c a u s e of t h e n e a r l y symmetrical n a t u r e of t h e r e s p o n s e about f o . The d e s i g n p r o c e d u r e d e s c r i b e d a b o v e p r o v i d e s a p e r f e c t i m p e d a n c e match a t c e r t a i n f r e q u e n c i e s a n d a s s u r e s t h a t t h e maximum m i s m a t c h t h r o u g h o u t t h e p a s s b a n d w i l l n o t b e l a r g e .
1 1 - 1 . The r e f l e c t i o n c o e f - f i c i e n t a t t h e o t h e r end i s becomes c o n v e n i e n t f o r c o m p u t a t i o n . This expression applies t o dissipa- t i o n l e s s r e c i p r o c a l n e t w o r k s and a l s o t o n o n - r e c i p r o c a l d i s s i p a t i o n l e s s n e t w o r k s f o r t h e c a s e o f t r a n s m i s s i o n from L e f t t o r i g h t . I f we f u r t h e r and f o r a d i s s i p a t i o n l e s s n e t w o r k R , t h a t t h e n e t w o r k i s r e c i p r o c a l ( i .