Microwave Filters, Impedance-Matching Networks, and Coupling by G. Matthaei, E.M.T. Jones, L. Young

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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Example text

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 .

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