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
Life of this patent
Estimating the term…
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.
Claims26
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 having a circular outer interface and a first circular port, which forms a first output/input port of the first mode converting structure;
- and
- N first rectangular waveguides, wherein a first port of the N first rectangular waveguides is respectively connected to the circular outer interface of the first waveguide and arranged uniform radially;
- a long edge of the first port of the N first rectangular waveguides is parallel to a first axis of the first waveguide;
- and a second port of the N first rectangular waveguides forms at least one second 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 having an outer interface and an inner interface which are circular and coaxially-arranged, and having a second circular port which forms a third output/input port of the second mode converting structure, wherein the first waveguide is sleeved into the second waveguide;
- and
- M second rectangular waveguides, wherein a third port of the M second rectangular waveguides is respectively connected to the outer interface of the second waveguide and arranged uniform radially;
- a long edge of the third port of the M second rectangular waveguides is parallel to a second axis of the second waveguide;
- and a fourth port of the M second rectangular waveguides forms at least one fourth output/input port of the second mode converting structure, wherein M is a positive integer greater than 1 and equal to 2n and any two adjacent of the M second rectangular waveguides converge into a Y-shaped or T-shaped structure and n is a positive integer equal to or greater than 3.
A multi-channel rotary joint operating with a series of TE or TM mode electromagnetic wave comprising first and second waveguide elements, wherein each of the first and second waveguide elements comprises:
- a first mode converting structure, which comprises:
- a first waveguide having a circular outer interface and a first circular port, which forms a first output/input port of the first mode converting structure;
- and
- N first rectangular waveguides, wherein a first port of the N first rectangular waveguides is respectively connected to the circular outer interface of the first waveguide and arranged uniform radially;
- a long edge of the first port of the N first rectangular waveguides is parallel to a first axis of the first waveguide;
- and a second port of the N first rectangular waveguides forms at least one second 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 having an outer interface and an inner interface which are circular and coaxially-arranged, and having a second circular port which forms a third output/input port of the second mode converting structure, wherein the first waveguide is sleeved into the second waveguide;
- and
- M second rectangular waveguides, wherein a third port of the M second rectangular waveguides is respectively connected to the outer interface of the second waveguide and arranged uniform radially;
- a long edge of the third port of the M second rectangular waveguides is parallel to a second axis of the second waveguide;
- and a fourth port of the M second rectangular waveguides forms at least one fourth output/input port of the second mode converting structure, wherein M is a positive integer greater than 1 and equal to 2n and any two adjacent of the M second rectangular waveguides converge into a Y-shaped or T-shaped structure and n is a positive integer equal to or greater than 3;
- wherein the first and second waveguide elements are coaxially arranged as the first output/input port and the second output/input port are arranged in opposition and rotatable relatively to each other.
Dependencies are inferred from the claim text.