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Ultra-wideband dielectric rod antenna for 18-40GHz frequency band

A dielectric rod, ultra-wideband technology, applied in the direction of the connection of the antenna grounding switch structure, the structural form of the radiating element, etc., can solve the problem of pattern splitting at high frequencies, the operating frequency band of the dielectric rod antenna is narrow, and the 18-40GHz frequency band cannot be fully covered. , to achieve the effect of widening the working bandwidth and avoiding the splitting of the pattern

Active Publication Date: 2019-12-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem that the existing dielectric rod antenna has a narrow operating frequency band, cannot completely cover the 18-40GHz frequency band and the pattern splits at high frequencies, and further provides an ultra-wideband dielectric rod antenna for the 18-40GHz frequency band

Method used

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  • Ultra-wideband dielectric rod antenna for 18-40GHz frequency band
  • Ultra-wideband dielectric rod antenna for 18-40GHz frequency band
  • Ultra-wideband dielectric rod antenna for 18-40GHz frequency band

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specific Embodiment approach 1

[0043] Specific implementation mode one: combine Figure 1-14 Describe this embodiment, an ultra-wideband dielectric rod antenna for the 18-40GHz frequency band, which includes a dielectric rod structure 1 and a feed structure 2, and the dielectric rod structure 1 includes a cylindrical section 11, a circular frustum section, and 12 and a transition block 13, the feed structure 2 includes a ridge waveguide 21, an impedance transformation ladder 22 and a coaxial line 23,

[0044] The outer conductor 23-1 of the coaxial line 23 is fixed to the upper ridge 21-3 of the ridge waveguide 21 through the metal plate 21-2, and the inner conductor 23-2 of the coaxial line 23 is connected to the lower ridge 21 of the ridge waveguide 21 through the impedance transformation step 22. Ridge 21-4 is fixedly connected,

[0045] The upper ridge 21-3 of the ridge waveguide 21 includes a first ridge segment 21-31 and a second ridge segment 21-32, the first ridge segment 21-31 has a rectangular bl...

specific Embodiment approach 2

[0068] Specific implementation mode two: combination Figure 1-14 To illustrate this embodiment, the outer dimension A of the width of the shell of the ridge waveguide 21 is 9.4 mm, the inner dimension a of the shell is 7.4 mm, the outer dimension B of the height of the shell is 6.2 mm, and the inner dimension b of the height of the shell is 4.2 mm. The body axial length L4 is 32 mm.

[0069] The length L of the lower ridge 21-4 6 is 23.1mm, the width of the lower ridge 21-4 is 1.83mm, and the ridge curve adopts the form of an exponential function:

[0070] y=e kx -1, x∈[0,23.1]

[0071] Where x represents the distance of the ridge curve along the axial direction of the ridge waveguide 21, y represents the vertical distance between the ridge curve and the inner surface of the ridge waveguide 21, k is used to adjust the shape of the curve, and k is 0.037.

[0072] The dielectric rod structure 1 is made of polytetrafluoroethylene material with a relative permittivity of 2.2....

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Abstract

The invention discloses an ultra-wideband dielectric rod antenna for an 18-40GHz frequency band, and belongs to the technical field of radio. The problems that an existing dielectric rod antenna is narrow in working frequency band and cannot completely cover the frequency band of 18-40 GHz, and a directional diagram is split at the high frequency are solved. The outer conductor of a coaxial line is fixedly connected with the upper ridge of a ridge waveguide through a metal plate, the inner conductor of the coaxial line is fixedly connected with the lower ridge of the ridge waveguide through animpedance conversion step, the first ridge section is of a rectangular block structure and is located over an impedance conversion step. The second ridge section and the lower ridge are symmetricallyarranged up and down, and the opposite surfaces of the second ridge section and the lower ridge are inclined surfaces, the thicknesses of the second ridge section and the lower ridge are gradually reduced in the direction from the coaxial line to a circular truncated cone section, a transition block is inserted between the second ridge section and the lower ridge in the ridge waveguide, the largeend of the circular truncated cone section is clamped at one end of the ridge waveguide, a plurality of first air holes distributed in the axial direction of the cylindrical section are machined in the cylindrical section, and a plurality of second air holes distributed in the length direction of the transition block are machined in the transition block.

Description

technical field [0001] The invention relates to an ultra-wideband dielectric rod antenna for 18-40GHz frequency band, belonging to the field of radio technology. Background technique [0002] Dielectric rod antennas have the advantages of high gain and small aperture. Therefore, dielectric rod antennas have been widely used in microwave measurement and electromagnetic compatibility testing. [0003] According to the broadband requirements of the microwave measurement system, the K-band is 18-26.5GHz, and the Ka-band is 26.5-40GHz. However, due to the insufficient width of the working frequency band in the existing technology, two antennas are needed to achieve full coverage in the test, resulting in resource waste of [0004] At the same time, in the 18-40GHz frequency band of the existing technology, the pattern at high frequencies is prone to splitting, which will cause problems such as gain reduction and sidelobe level increase, which will affect the measurement results ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/50
CPCH01Q1/36H01Q1/50
Inventor 林澍矫健林聂秋月张仲麟
Owner HARBIN INST OF TECH
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