Multi-channel mode converter and rotary joint operating with a series of te or tm mode electromagnetic wave
AssigneeNational Tsing Hua University
InventorsTSUN-HSU CHANG, NAI-CHING CHEN
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Abstract
A multi-channel mode converter operating with a series of TE or TM mode electromagnetic wave includes a plurality of coaxial waveguides arranged in overlay configuration. By controlling radius ratio and the number of coupling aperture of each coaxial waveguide, high power and high purity of operating mode of electromagnetic wave can be obtained and the major parasitic mode of electromagnetic wave can be suppressed, so as to avoid crosstalk between coaxial waveguides. A rotary joint including the above-mentioned mode converter with multi-channel is also disclosed.
Claims30
A multi-channel mode converter operating with a series of TE or TM mode electromagnetic wave comprising a waveguide element, wherein the waveguide element comprises:
- a first mode converting structure, which comprises:
- a first waveguide with a circular outer interface;
- and
- N first rectangular waveguides, wherein a first port thereof is respectively connected to the outer interface of the first waveguide and arranged uniform radially;
- a long axis of the first port of the first rectangular waveguide is axially parallel to the first waveguide;
- a second port of the N first rectangular waveguides forms at least one first output/input port of the first mode converting structure, wherein N is a positive integer greater than 1;
- and
- a second mode converting structure, which comprises:
- a second waveguide with an outer interface and an inner interface which are circular and coaxially-arranged, wherein the first waveguide is sleeved into the second waveguide;
- and
- M second rectangular waveguides, wherein a first port thereof is respectively connected to the outer interface of the second waveguide and arranged uniform radially;
- a long axis of the first port of the second rectangular waveguide is axially parallel to the second waveguide;
- a second port of the M second rectangular waveguides forms at least one first output/input port of the second mode converting structure, wherein M is a positive integer greater than 1;
- wherein a port of the first waveguide and the second waveguide respectively forms a second output/input port of the first mode converting structure and the second mode converting structure.
A multi-channel rotary joint operating with a series of TE or TM mode electromagnetic wave comprising two waveguide elements, wherein each of the waveguide elements comprises:
- a first mode converting structure, which comprises:
- a first waveguide with a circular outer interface;
- and
- N first rectangular waveguides, wherein a first port thereof is respectively connected to the outer interface of the first waveguide and arranged uniform radially;
- a long axis of the first port of the first rectangular waveguide is axially parallel to the first waveguide;
- a second port of the N first rectangular waveguides forms at least one first output/input port of the first mode converting structure, wherein N is a positive integer greater than 1;
- and
- a second mode converting structure, which comprises:
- a second waveguide with an outer interface and an inner interface which are circular and coaxially-arranged, wherein the first waveguide is sleeved into the second waveguide;
- and
- M second rectangular waveguides, wherein a first port thereof is respectively connected to the outer interface of the second waveguide and arranged uniform radially;
- a long axis of the first port of the second rectangular waveguide is axially parallel to the second waveguide;
- a second port of the M second rectangular waveguides forms at least one first output/input port of the second mode converting structure, wherein M is a positive integer greater than 1;
- wherein a port of the first waveguide and the second waveguide respectively forms a second output/input port of the first mode converting structure and the second mode converting structure, and the two waveguide elements are coaxially arranged as the second output/input ports are arranged in opposition.
Dependencies are inferred from the claim text.