Frequency-Selective Transmission by a Leaky Parallel-Plate-Like Waveguide

Abstract

The phenomena of high frequency-selective transmission of a plane wave by a dielectric two-dimensional (2-D) periodic waveguide, comprising a uniform dielectric layer sandwiched by two finite thickness 2-D periodic structures served as the waveguide wall is described. This structure is termed a leaky parallel-plate-like waveguide because the waveguide walls are not perfect reflection mirrors. The scattering characteristics and dispersion relation, including the phase and attenuation constants, of the 2-D periodic waveguide are thoroughly analyzed with the modal transmission-line method and Floquet theory. The extraordinary open stopbands caused by the contra-flow coupling between a leaky parallel-plate-like waveguide and the leaky waves, which are generated by 2-D periodic structures (waveguide walls), are displayed in the form of the Brillouin diagram. The phase-match condition is used to verify the resonant coupling between the incident plane wave and the leaky parallel-plate-like waveguide modes. Specifically, the transmission peak frequencies are accurately predicted.Index Terms-Frequency selective structure (FSS), leaky parallel-plate-like waveguide, resonant coupling, two-dimensional (2-D) periodic structures.

Resonance transmission through electromagnetic crystals consisting of metal strips

“…As was reported in [8], the resonance (frequency-selective) transmission is due to the phase-matching between the incident plane wave and the wave guided in a leaky waveguide. Thus, the dispersion relation of waveguide allows us to determine resonance transmission frequencies of the incident plane wave.…”

Microwave Activities in Taiwan

“…The researches of periodic structure include the structure developed for circular polarization selection [26] and systematically establishing the correlation between the scattering and dispersion characteristics [27] of a 2D periodic structure to identify the physical consequences of wave interaction within. In addition, the 2D periodic structure with defect having the frequency-selective transmission characteristic was interpreted thoroughly by the leaky parallel-plate-like waveguide mode [28].…”

“…In PPAEU program, hundreds of proposals have been submitted for review. Only [20][21][22][23][24][25][26][27][28][29][30] projects were finally approved after a rigorous selection process. One of them was entitled "Advanced Technologies for Telecommunications", jointly proposed by Prof. C. H. Chen of National Taiwan University (NTU) and Prof. S. T. Peng of National Chiao Tung University (NCTU).…”

Mode discussion of the microstrip traveling antenna

“…By calculating the complex propagation constant (k z = β z − jα z ) of higher order modes, where β z is the phase constant and α z is the attenuation constant, generally speaking, the propagation regions can be divided into four regions with decreasing frequency : (i) cutoff region ( β z < α z ), (ii) surface‐wave region ( k s > β z > k 0 ), (iii) radiation region ( β z < k 0 , β z > α z ), and (iv) bound‐mode region ( β z > k s ). There are a few researches of the traveling antenna that have been studied for the improvement of size reduction and radiation characteristics . However, it is known that the resonant modes of the traveling antenna are very complex and hard to explain.…”