Equivalent circuit of an inside cylindrical microstrip GAP discontinuity

The equivalent circuit of the microstrip gap discontinuity of a cylindrical microstrip line mounted inside a cylindrical surface is studied using a full‐wave formulation and a moment‐method calculation. The equivalent circuit is modeled as a π network consisting of the equivalent gap admittance and the equivalent open‐end admittance, which are determined from the reflection and transmission coefficients from the gap discontinuity. Typical theoretical results are calculated and presented.