A Novel to Mode Converter Designed With Radially Loaded Dielectric Slabs

A Method for Accurately Characterizing Single Overmoded Circular TM01-TE11 Mode Converter

“…Wang et al [17] simply explain that these peaks are caused by weak resonators existing between the identical converters, but provide no further tackling way. The other method used in some literatures [1]- [3], [5] is to measure the device's far-field E or H plane radiation pattern. This method can verify the device's output mode, but cannot provide precise conversion efficiency.…”

“…In some RF systems, such as high-power microwave (HPM), plasma heating systems, millimeter wave and terahertz wave systems [1]- [7], the overmoded circular waveguide mode converters are widely used to convert the produced mode in a radiation source to the mode needed for specific tasks, and mitigate the possibility of breakdown [8]- [10].…”

Periodic printed semi-annular substrate loaded TM01–TE11 mode converter

“…These designs exhibit high conversion efficiency but have a disadvantage of non-aligned ports and nonlinear waveguide axis, which makes the structure non-compact. Other types of mode-converter designs consist of linear axis circular waveguides [10][11][12][13][14][15][16][17][18][19][20][21], in which both of the ports are aligned. These designs have some perturbation in the waveguide to perform mode conversion operation.…”

“…The perturbation in waveguide limits the conversion efficiency as well as power handling capability. Some of the designs [16,[19][20][21] are based on the principle of phase shift in the lower semicircular waveguide. The phase shift can be provided by the perturbation caused due to pure dielectric [19,20] or pure metallic [21] structures.…”

“…Some of the designs [16,[19][20][21] are based on the principle of phase shift in the lower semicircular waveguide. The phase shift can be provided by the perturbation caused due to pure dielectric [19,20] or pure metallic [21] structures. The perturbing structure also adds extra weight to the converter.…”