Circular polarized helical radiation element and its array antenna operable in TX/RX band
First Claim
1. An apparatus operable in the both of transmission (TX) band and receiving (RX) band, comprising:
- at least one helical radiation element for radiating orthogonal circular polarized waves in the TX and RX bands, wherein the helical radiation element includes a helix, and opposite ends of the helix are coupled to the two feed lines, respectively.
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Abstract
Provided are Circular Polarized Helical Radiation element and its Array Antenna operable in TX band and RX band. The circular polarized helical radiation element and its array antenna and the antenna with double reflection boards using that array can operate at TX/RX dual band which is high frequency such as Ka band by operating the helical antenna in axial mode and implementing dual feeding structure. The array antenna having a number of radiation elements operable in the both of TX band and RX band, wherein the radiation elements are arrayed on predetermined column lines, each radiation element comprising: a helix for radiating orthogonal circular polarized waves in the different frequency bands wherein the helix is fed at its beginning point and its terminating point; and a wave guide for accommodating the helix.
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Citations
15 Claims
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1. An apparatus operable in the both of transmission (TX) band and receiving (RX) band, comprising:
at least one helical radiation element for radiating orthogonal circular polarized waves in the TX and RX bands, wherein the helical radiation element includes a helix, and opposite ends of the helix are coupled to the two feed lines, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An array antenna having a number of radiation elements operable in the both of TX band and RX band, wherein the radiation elements are arrayed on predetermined column lines, each radiation element comprising:
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a helix for radiating orthogonal circular polarized waves in the different frequency bands wherein the helix is fed at its beginning point and its terminating point; and
a waveguide for accommodating the helix. - View Dependent Claims (11, 12)
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13. A circular polarized array antenna, having double reflection boards, of the unit radiation elements operating in circular polarized waves in the TX/RX band, comprising:
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a reflection means for transmitting and receiving signals after reflecting twice; and
a feed array unit having a number of radiation elements which are arrayed in a predetermined interval, wherein the radiation element includes a helix for radiating orthogonal circular polarized waves in the different frequency bands wherein the helix is fed at its beginning point and its terminating point; and
a waveguide for accommodating the helix.
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14. The method for preparing a helical antenna, comprising the steps of:
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forming a pattern of a plurality of arcs on a dielectric board, wherein the shape of the dielectric board has fan-shaped structure;
positioning a number of conductor arcs for making a helix after transforming the fan-shaped dielectric board into a cone structure;
electrically coupling joining parts of conductor arcs helical structure to thereby for the helix; and
electrically connecting opposite points of the helix to two feeding ports, respectively. - View Dependent Claims (15)
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Specification