Planar Slotted Ridged Waveguide Arrays with Dielectric Filling

The algorithm for calculating electrodynamic characteristics of hybrid types of waves propagating in double ridged waveguide with piecewise-layered dielectric filling is presented. The double ridged waveguide structure with dielectric plates installed between the ridges, and with dielectric sample sandwiched between the dielectric substrates is consid-ered. The calculations are carried out using the method of partial regions. The presented algorithm takes into account the electromagnetic field components singularities near the dielectric and metal edges of the waveguide. The technique for calculating the electromagnetic energy losses in the double ridged waveguide with a piecewise layered dielectric filling is provided. The classification of hybrid waves is given. The spatial structures of electromagnetic fields and their planar projections (front view, top view, side view) for the first two HEwaves and the first EH-wave are demonstrated. Cutoff fre-quencies and propagation constants of HEand EH-waves are calculated. The results obtained using the described meth-od and numerical approach are compared. Then the results are analyzed.

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Characteristics of linear slotted waveguide arrays on the rectangular waveguide with two-layer dielectric filling at excitation by the slowed down dominant mode

2011 VIII International Conference on Antenna Theory and Techniques ◽

10.1109/icatt.2011.6170727 ◽

2011 ◽

Cited By ~ 1

Author(s):

A. A. Lyakhovsky ◽

A. F. Lyakhovsky ◽

N. K. Blinova ◽

L. P. Yatsuk

Keyword(s):

Rectangular Waveguide ◽

Dominant Mode ◽

Waveguide Arrays ◽

Slotted Waveguide ◽

Dielectric Filling

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Slotted ridged waveguide antennas with partial dielectric filling

Antennas ◽

10.18127/j03209601-202101-01 ◽

2021 ◽

Author(s):

A. O. Pelevin ◽

G. F. Zargano

Keyword(s):

Dielectric Layer ◽

Dielectric Material ◽

Low Frequency ◽

Ridge Waveguide ◽

Mass Dimension ◽

Slotted Waveguide ◽

Ridged Waveguide ◽

Dielectric Filling ◽

Thin Dielectric Layer ◽

Lower Frequencies

Slotted single-ridge waveguide antenna with dielectric filling has been simulated. Dielectric material has been used to fill the slots, and to form a thin layer directly under the slotted broad wall. The specific pairs of ridge dimensions have been found that provide the same cut-off frequency for an air-filled ridged waveguide as it is for a broader air-filled rectangular waveguide. It has been shown that waveguide ridging followed by insertion of a thin dielectric layer under the slotted wall shift consecutively the antenna operating band down to lower frequencies. The specific values of thickness and permittivity of the dielectric layer suitable for frequency shifting have been found. The simulated characteristics of a 20-element dielectrically filled slotted single-ridge waveguide antenna have been presented. Resultantly, the efficient method of shifting the operating interval of a slotted-waveguide antenna down to lower frequencies has been proposed. The method does not require a broader waveguide, and therefore is effective with respect to low frequency – mass/dimension trade-off.

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