Without using Darlington D type section

this paper gives a solution of realizing

without restrictive conditions

the complex transfer zeros for lossless network by means of three-element bridge sections and/or bridge sections without magnetic coupling

if it is desired to find a network from two given network parameters

such as Z11

Z12

or Y11

Y12.Each group of the complex transfer zeros may be realized by means of two sections in cascade: one is a bridge section

the other a previous section. The bridge section is used to produce the transfer zeros. This paper shows that the necessary and sufficient condition for using such bridge section as the input network is that the bridge section test value of the input impedance of the network is equal to zero. If the driving point impedance does not satisfy this condition

a previous section must be inserted. The previous section is an impedance transformation network

which transforms the driving point impedance to satisfy this condition. The previous section does not produce transfer zero. It is proved that the previous section may be a series branch section or a parallel branch section. This section does not contain more than two elements in general.A series of problems involved in the synthesis are discussed. The calculation method and formulas are given

which suit computer aided design. An example is given to illustrated the practical application of the method.