Site Visited 501677 times Page Visited 20 times You are in : Etantonio/EN/Universita/5anno/CircuitiIntegratiMicroonde/     

Monoliticizzazione of the dividing couplers and

1) Necessity to realize dividing and couplers with elements to parameters concentrate to you:

In the dividing ones they often use a lot of lthe /4, for inferior frequencies to 20GHz the that it means a long line approximately 1mm that it is too much for a realization on monolitico therefore can be replaced lthe /4 with a semidistributed circuit or with a circuit completely to parameters concentrates to you.

2) semidistributed Structure in order to replace lthe /4:

It is constituted from the series of three nets, first and third are abilities placed in parallel while the second one is a feature of line with characteristic stiffness Z and length q, the incognito are therefore C, Z, q and can be obtained equaling the matrix of transmission of the total net with the matrix of transmission of the having /4 netto l characteristic stiffness Z1 and q = p/2 .

Uguagliando the coefficients To the equation is obtained while equaling the B coefficients is obtained this last one in particular evidences a practical limit of this structure in fact with diminishing of q increases the Z stiffness of the line to l/4 until reaching not realizable values in mstrip.

3) Net to parameters concentrates to you in order to replace lthe /4:

The net is equal to the previous one only that stavolta the intermediate feature of line comes realized by means of an inductance, the elements To and B of its matrix of transmission can be gains by means of the relations with the elements of the matrix admittance to you, in particular and being also To = 0 in the matrix while from ricava is had.

 

4) Net to parameters concentrates to you in order to replace 3l/4:

In this case the net is constituted from two ability series between which it is frapposta an inductance parallel, the parameters To and B of its matrix of transmission can be gained by means of the relations with the elements of the Z matrix, in particular and being also To = 0 in the matrix that describes the feature of having line alongl /4 characteristic stiffness Z1 , it is had while from is obtained.