This paper presents the influence on the transmission characteristics of swelling in rectangular waveguides for Q-band. We derived the Green's functions of the waveguide with eigenfunction expansion method. The reflection coefficient of the waveguide with a swelling is calculated by using internal impedance in order to investigate the influence of swelling in the waveguide. In order to check the validity of the theoretical analysis, the calculated reflection coefficients are compared with the measured results.
This paper considered the electromagnetic field reduction which penetrated into the slot by adding the conducting strip around the slot on the infinite conducting plane. In addition, the study examined how the structural changes in the additional conducting strip affected the reduction characteristics of the penetrated electromagnetic field by calculating the penetrated electric field depending on the gap and the length of the additional conducting strip.
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