The equivalent parameters for the radiating slot on a sectoral waveguide

Analysis of Slotted Sectoral Waveguide Arrays With Multilayered Radomes

“…Hence, using the z-component of the magnetic field, Hz, due to the TE11 excitation given in [3], the final closed-from expression of I (I) i is obtained for p = q = 1 as…”

“…Assuming the fundamental TE11 mode is the only propagating mode in the waveguide and making use of (2), Hz is calculated at the predefined reference planes (such as excitation ports or loads), which are located sufficiently far enough from the slots to ensure that only the TE11 mode waves exist on the reference planes, and all other higher order modes are highly attenuated due to being evanescent modes. As a result, a backward or forward scattered TE11 field coefficient is defined as the ratio of (2) evaluated at z = z for (p, q) = (1, 1), and a unit amplitude TE11 excitation given in [3], and is given by…”

“…First, a phased array with wide 3-dB beamwidth (BW) elements can achieve a large scanning range. Wide-angle scanning phased array with pattern reconfigurable elements is one of typical examples [3]- [5]. In [5], the whole scanning area was divided into several subareas according to the reconfigurable elements' different reconfigurable modes.…”

A Two-Slot Array Antenna on a Concentric Sectoral Cylindrical Cavity Excited by a Coupling Slot

“…These distances are fixed at 0.75λ. The spacing between the radiating slots is fixed at 0.5λ, for the maximum directivity and the lengths of the radiating slots are fixed at 0.5λ which is closed to the resonant length given in [22]. The variable l sc1 , which is the distance from the shorted end of the circular waveguide to the center of the coupling slot, is fixed at 0.5λ g , where λ g refers to the guided wavelength of the TM 01 mode of the circular waveguide.…”

“…Many researches on slot antennas have been extensively studied on different structures such as rectangular waveguides [1][2][3][4][5][6][7], spheroids [8], infinitely long cylinders [9][10][11], circular cylindrical cavities [12] and coaxial cables [13][14][15][16][17]. Slot antennas on sectoral cylindrical waveguides have been studied in [18][19][20][21][22]. An impedance characteristic of a sectoral cylindrical cavity-backed slot antenna excited by a probe was presented by [23,24].…”