A Bow-shaped Directional Antenna for Borehole Radar

A technology of borehole radar and directional antenna, which is applied in the directions of antenna, radiating element structure, radiation unit cover, etc., can solve the problem that the size of butterfly antenna cannot meet the requirement of 10cm borehole diameter, etc., and is conducive to radiating transient pulses. , good waveform fidelity, small overall size effect

Inactive Publication Date: 2019-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, since the operating frequency of the borehole radar is 100MHz to 700MHz, the size of the conventional butterfly antenna cannot meet the requirement of a borehole diameter of 10cm. Therefore, a miniaturized, wide-band, high-directional, suitable for working in boreholes has been developed. The butterfly antenna is an urgent problem to be solved in the development of the borehole radar system

Method used

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  • A Bow-shaped Directional Antenna for Borehole Radar
  • A Bow-shaped Directional Antenna for Borehole Radar
  • A Bow-shaped Directional Antenna for Borehole Radar

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0028] Such as figure 1 As shown, a butterfly directional antenna for drilling radar includes two copper butterfly antenna pieces 1 with arc-shaped ends, a glass fiber reinforced plastic dielectric shell 2, and ring connectors 3 located at both ends of the glass fiber reinforced plastic dielectric shell. Two copper butterfly antenna pieces are symmetrically placed in the physical center of the FRP dielectric enclosure, and the feeding ends are 10mm apart. There are two air via holes 4 with a diameter of 8 mm on the periphery of the FRP dielectric shell 2, one of which is connected to the antenna feed port, and the coaxial feed line 5 is placed therein to feed the antenna, and the other via is connected to the antenna feed port. The hole serves as the passageway for the radar system. The connection line of the two air via holes 4 passes through two copp...

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Abstract

The invention relates to the design field of borehole radar, in particular to a butterfly-shaped directional antenna for borehole radar. Including metal butterfly antenna with arc-shaped end, dielectric material shell, arc-shaped reflector, end-loaded resistor and capacitor, coaxial feeder, air via hole, etc. The shell of the dielectric material is cylindrical, and the butterfly antenna piece is buried in its physical center, and the end is loaded with series resistors and capacitors to connect with the curved reflector; the curved reflector is set on the side surface of the dielectric material shell to conform to it; the air is through the hole Through the two end faces of the dielectric material shell, it is used as a cable passage; the coaxial feeder is connected to the feeder port of the metal butterfly antenna piece through the air hole. The antenna of the invention has small overall size, adapts to the shape of the borehole, has wide working frequency band, can match with the signal source, and has good waveform fidelity and directivity.

Description

technical field [0001] The invention relates to the design field of borehole radar, in particular to a butterfly-shaped directional antenna for borehole radar. Background technique [0002] Ground-penetrating radar is an efficient geophysical method to determine the distribution of underground media by using high-frequency electromagnetic waves with a frequency between 100MHz and 4000MHz. Borehole radar is a variant form of ground penetrating radar, which can make up for the shortcomings of conventional ground ground penetrating radar technology and geological exploration technology, and provide three-dimensional information of underground targets in a wider range. Its main application fields are in environmental assessment, engineering geology, geotechnical engineering, archaeology, hydrogeology, and site selection of high-level radioactive waste storage sites. Due to the omnidirectionality of electromagnetic wave propagation, the reflective single-hole radar can give info...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/42H01Q19/10
CPCH01Q1/36H01Q1/42H01Q19/10
Inventor 赵青郭佶玙马春光霍建建
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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