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Low-profile ultra-wideband log-periodic antenna unit

A logarithmic periodic antenna and ultra-wideband technology, which is applied to logarithmic periodic antennas, antennas, non-resonant long antennas, etc., can solve problems such as deterioration of pattern and standing wave, large narrow-side coupling, and high-frequency pattern cannot be improved. , to achieve the effect of miniaturization and size reduction

Active Publication Date: 2020-12-18
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the current traditional log-periodic antenna: (1) large size, (2) large narrow-side coupling, deterioration of pattern and standing wave (more obvious formation), (3) high-frequency pattern cannot be improved And other issues

Method used

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  • Low-profile ultra-wideband log-periodic antenna unit
  • Low-profile ultra-wideband log-periodic antenna unit
  • Low-profile ultra-wideband log-periodic antenna unit

Examples

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Embodiment Construction

[0021] refer to Figure 1 ~ Figure 4. In the preferred embodiment described below, a low-profile ultra-wideband log-periodic antenna unit based on a graded-index lens includes: N parallel arrays connected to a pair of two-wire transmission lines, that is, collective lines, and the feed source is connected to the shortest At one end of the vibrator, two adjacent vibrators are cross-fed and printed on a plane dipole (1) on a dielectric substrate (3), and a radio frequency coaxial cable (5) is supported on the center line of the dielectric substrate (3). The matching branches of the pair of long dipole arms of the ultra-broadband printed logarithmic periodic planar dipole (1) are alternately printed on both sides of the axisymmetric center line of the collection line, and the outer conductor (5-2) of the radio frequency coaxial cable (5) Impedance matching is realized through the chip resistors (6) arranged at the longest vibrator end of the wide-side assembly line terminal of t...

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Abstract

The invention discloses a low-profile ultra-wideband log-periodic antenna unit, and aims to provide a log-periodic antenna unit with narrower high-frequency directional diagram beams and higher gain.According to the technical scheme, logarithmic long oscillator arm matching branches of the ultra-wideband printing logarithmic periodic planar dipole are printed on the two sides of the axial symmetry center line of a collection line in a staggered mode respectively, and a radio frequency coaxial cable penetrates through an outer conductor to be supported on the center line of a dielectric substrate in a suspended mode. The outer conductor realizes impedance matching through a patch resistor configured at the longest oscillator end of the wide-edge assembly line terminal of the dielectric substrate, and a gradient refractive index lens fixedly connected with a narrow-edge planar dipole loads standing wave characteristics of the log-periodic antenna and focuses high-frequency wave beams torealize pitching surface wave beams which only converge the high-frequency wave beams; after feeding, the electromagnetic energy is transmitted along the assembly line, oscillators in anexcitation area are excited in sequence, the guided waves propagated on the transmission line are converted into unbounded media to be propagated, and 360-degree uniform radiation is shown on a horizontal directional diagram.

Description

technical field [0001] The invention relates to a low-profile ultra-wideband logarithmic periodic antenna unit LPDA (Log-Periodicdipoleantenna) based on a graded-refractive-index lens, which is suitable for application in the fields of navigation, detection, and ultra-wideband (UWB) communication. Background technique [0002] The logarithmic periodic antenna LPDA is an antenna designed based on the principle of scaling. All the dimensions of the vibrator and the distance between the vibrator have a certain proportional relationship. Its characteristic is that it changes periodically with the logarithm of the frequency. It is a non-frequency variable antenna. The so-called non-frequency variable means that the electrical characteristics of the antenna such as impedance, pattern, gain, and standing wave ratio change periodically with the logarithm of the frequency, and remain basically unchanged in a wide frequency band. . With the development of modern communication technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q11/10H01Q15/02
CPCH01Q11/10H01Q1/38H01Q1/50H01Q15/02H01Q1/36Y02D30/70
Inventor 陈晨黄明乔文昇孙超朱军
Owner 10TH RES INST OF CETC
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