The paper analyzed an S-band single ridged waveguide antenna used for near field measure by FDTD method and microwave transmition line theory.

Further computation indicates that the ferrite slabs loaded ridged waveguide has broadband frequency properties and the grooved waveguide has greater differential phase shift.

To achieve high optical power as well as low vertical divergence angle,a new kind of optim ized large opti- cal cavity (L OC) structure is applied to a ridge waveguide 980 nm In Ga As/ Ga As/ Al Ga As m ulti- quantum well laser.

It is found that optimization of the structure parameters of ridge waveguide (RWG) can decrease the threshold current of RWG laser diode.

5 μm InGaAsP integrated device was fabricated by using the ridge waveguide.

Ridged Waveguide Eigenvalues Analysis With FEM;

This paper describes the application of finite element method for obtaining the cutoff wavelength,field pattern and bandwidth in ridged waveguide of ridge on the short side,gives the specific equation of related parameter to the subject.

As an application,representative computational examples,including dielectric-rod-loaded rectangular and double-ridged waveguides,are given to validate the theory,and to demonstrate the degree of its efficiency.