Читать книгу Introduction To Modern Planar Transmission Lines - Anand K. Verma - Страница 118

The shunt admittance is Y = G + jB. To compute S₁₁, the port‐2 is terminated in Z₀ (=1/Y₀) giving Y_in = Y + Y₀. The reflection coefficient of the shunt admittance under matched termination is

(3.1.68)

Likewise, to compute S₂₂ of the shunt admittance, the port‐1 is terminated in Z₀:

(3.1.69)

Following the previous case of the series impedance, the S₂₁ is computed:

Fig (3.16) shows V₁ = V₂; therefore,

(3.1.70)

Figure 3.16 Network of shunt admittance.

The [S] matrix of the shunt admittance is

(3.1.71)

The attenuation of the input signal due to the shunt admittance is

(3.1.72)

The lagging phase shift of the signal at the output port‐2, due to the shunt admittance, is

(3.1.73)