Resonant Transmission Through a Pair of Ridge-Loaded Circular Sub-Wavelength Apertures

Comparison of Mutual Coupling Phenomena in Subwavelength Ridged Circular Apertures and Half-Wavelength Dipole Antenna Arrays

“…Alternatively, the addition of two ridges in an electrically small circular aperture also considerably enhances the transmitted power [7][8][9]. The resonance power transmission of ridged circular apertures as a function of the distance between them was also recently explored [10], experimentally verified [11], compared with dipole arrangements [12], and investigated up to its infinite periodic structure [13]. Furthermore, the recent interest in surface plasmons (SPs), followed by Ebbesen's seminal discovery of extraordinary optical transmission (EOT) [14], have led to optical transmission via bowtie, H-, and C-shaped apertures perforated in metallic plates [15][16][17][18][19][20][21].…”

Experimental Validation of Resonant Microwave Transmission Through Subwavelength Ridged Circular Apertures in Thin Conducting Screen

“…The experimental measurements are conducted in an anechoic chamber that is optimized in the X‐band (8–12 GHz). In previous studies , a vector network analyzer (VNA) is used to measure the transmission characteristics, instead of a signal generator and spectrum analyzer. Yet, as the transmitting signal of the VNA is too low to detect the transmitting power, a broadband power amplifier (PA) is also needed for efficient measurement.…”

“…In addition, several studies have reported on the power transmission through subwavelength hole arrays or single and multiple SRCAs . For example, an extraordinary EM wave transmission was observed through circular aperture arrays in a millimeter wave range , the power transmission through a SRCA was compared with that through a long slot or circular aperture , and the EM wave transmission through multiple SRCAs was measured to observe the mutual coupling effects .…”