Effective High-Precision Analysis of Thin Asymmetric Inductive Diaphragm in Rectangular Waveguide Using Integral Equation Method

Investigation and Implementation of Integrated SIW System for Hexagonal Diamond of Lamda Shape Slots Fractal Array Antenna for X and KU-Band Applications

“…The cutoff frequency of 𝑇𝐸 𝑚,𝑛 mode in the traditional rectangular waveguide can be calculated using (1) where, m and n are the number of half waves in x and y direction considering z as the direction of wave propagation. For the 𝑇𝐸 10 mode calculations equation( 1) is reduced to (2) for the air filled waveguide [17], where c is the free space velocity of light (𝑐 = 3 × 10 8 𝑚/𝑠).So, the dimension 𝑎 = 24.39 𝑚𝑚 for 𝑇𝐸 10 air filled waveguide, at 𝑓 𝑐 = 6.15 𝐺𝐻𝑧,is the cut off frequency of propagating mode and operating frequency must be more than 𝑓 𝑐 . (1)…”

“…The rectangular waveguide devices manufacturing is rather complicated and more expensive since high precision mechanical adjustment is needed to obtain the resonant in case of slots at the standing wave peaks. Moreover, the integration of these structures with planar components are more difficult and requires sophisticated transitions [1][2][3]. However, Microstrip technologies are, easy and less expensive compared with waveguide technologies, but have the disadvantages of radiation loss and not being shielded [4][5][6][7].…”