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把矩形波导一个宽面外突成均匀曲面构成的新波导统称为共形波导．利用金属波导边界条件、变分法、边界元素法构造这种新波导中主模场的一种近似解表达式，包括曲面横截线为对称、非对称圆弧，抛物线弧，双曲线弧，椭圆弧等．然后根据等效原理，推导非对称圆弧－矩形波导曲面上窄的纵向半波长缝隙的等效谐振电导的近似计算公式，给出计算曲线．这种解虽然是近似的，但却能解决这类共形波导缝隙天线的工程设计．
Rectangular waveguide protruding into a uniform surface into a uniform surface of the new waveguides are generally referred to as conformal waveguide. An approximate solution of the main mode field in the new waveguide is constructed by using metal waveguide boundary conditions, variational methods and boundary element methods. The approximate solution expressions for the main mode field include curved symmetry, asymmetrical circular arc, parabolic arc, hyperbolic arc, Elliptical arc and so on. Then based on the equivalent principle, the approximate calculation formula of the equivalent resonant conductance of the narrow longitudinal half-wavelength slit on the asymmetrical circular arc-rectangular waveguide surface is derived, and the calculation curve is given. Although this solution is approximate, it can solve the engineering design of such a conformal waveguide slot antenna.