Log-periodic dipole array antenna for feeding substrate integrated waveguide
A substrate-integrated waveguide and logarithmic period technology, which is applied to logarithmic period antennas, antennas, non-resonant long antennas, etc., can solve the problems of large size and difficult to use coaxial wire feeding, etc., and achieves good repeatability and convenience. Highly integrated, high-precision effects
Inactive Publication Date: 2009-12-30
SOUTHEAST UNIV
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Problems solved by technology
Spatial logarithmic periodic array antennas are widely used in broadband communication systems. Due to their large size, they have gradually developed into printed logarithmic periodic array antennas. However, it is difficult for millimeter-wave printed logarithmic periodic array antennas to be fed by coaxial lines.
Method used
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Embodiment 1
[0024] Embodiment 1 Substrate Integrated Waveguide Feeding Logarithmic Periodic Dipole Array Antenna
[0025] The antenna structure is shown in Figure 4, and the dimensions are listed in Table I. Figure 5 is the measured antenna reflection coefficient, Figure 6-Figure 7 Indicates the pattern of the antenna at 20GHz and 35GHz, where Ex represents the main polarization pattern of the E plane; Hx represents the main polarization pattern of the H plane; ECo represents the cross polarization pattern of the E plane; Hco represents the cross polarization direction of the H plane picture.
[0026] Table I represents the dimensions of Example 1.
[0027] Table I
[0028] Antenna Geometry
[0029]
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The invention relates to a wideband log-periodic dipole array antenna for feeding a substrate integrated waveguide. An upper metal coating (2) is provided with an upper assembly line (5), upper feed source element antennae (7), an upper surface (9) of the substrate integrated waveguide, a microstrip taper transition line (6) and a 50-ohm output microstrip line (8) which are sequentially connected, wherein the upper assembly line (5) is connected with the upper surface (9) of the substrate integrated waveguide, the upper feed source element antennae (7) are respectively arranged at both sides of the upper assembly line (5); a lower metal coating (3) comprises a lower surface assembly line (11) of the log-periodic dipole array antenna, lower surface feed source element antennae (12), a lower surface (13) of the substrate integrated waveguide and a ground surface (14) of a microstrip line; the lower surface assembly line (11) of the log-periodic dipole array antenna is symmetric in parallel to the upper assembly line (5) of the log-periodic dipole array antenna, the lower surface feed source element antennae (12) are symmetric in cross to the upper feed source element antennae (7); and the lower surface (13) of the substrate integrated waveguide is symmetric to the upper surface (9) of the substrate integrated waveguide and is connected with the ground surface (14) of the microstrip line.
Description
technical field [0001] The invention is a logarithmic periodic dipole array antenna design technology based on a novel substrate integrated waveguide feeding structure. The designed antenna consists of logarithmic periodic dipole array antenna and substrate integrated waveguide structure. By cascading the substrate-integrated waveguide and the logarithmic periodic dipole array antenna, a broadband antenna with simple feeding structure, wide operating bandwidth and low loss is formed. The antenna design is based on planar printed circuit technology, which is small in size and suitable for planar high integration. Background technique [0002] With the rapid development of communication technology, broadband communication systems with many advantages such as low complexity, low cost, and wide operating bandwidth have been extensively researched and applied. Spatial log-periodic array antennas are widely used in broadband communication systems. Due to their large size, they h...
Claims
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Login to View More IPC IPC(8): H01Q11/10H01Q13/08
Inventor 翟国华洪伟蒯振起
Owner SOUTHEAST UNIV
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