Leakage coaxial cable based on triangular gap and triangular combination gap

Abstract

The invention provides a leakage coaxial cable based on a triangular gap and a triangular combination gap, which relates to the field of electronic science and technologies. The leakage coaxial cable overcomes the defects of uneven circumferential distribution of a radiation field, single polarization, larger reflection in the positions of gaps, and the like of the traditional radiating type leakage coaxial cable. The leakage coaxial cable generates more flat circumferential field distribution by arranging a periodic triangular gap, a periodic triangular combination gap, a periodic pennant-shaped gap and a periodic pennant-shaped combination gap on an outer conductor of the leakage coaxial cable; because the inclined edge of the triangular structure keeps a phase difference of components of the circumferential field and the axial field in a range of 30-120 degrees, the radiation of an elliptical polarized wave is realized, and the large electric wave decline is prevented from generating in the mobile terminal positions in different polarization states.

Description

technical field [0001] The invention relates to the field of electronic science and technology, in particular to the technology of gap radiation on the outer conductor of a coaxial cable, that is, the technology of a leaky coaxial cable. Background technique [0002] In restricted spaces and complex environments such as tunnels and mountainous areas, the propagation distance of electromagnetic waves generated by discrete antennas is relatively short, and the fading of space field strength (inhomogeneity of field strength) is large, and the communication quality and reliability of wireless communication systems reduced sex. In this case, the leaky coaxial cable is generally used instead of the discrete antenna system to produce a relatively uniform field strength coverage, thereby improving the quality and reliability of the wireless communication system. Leaky coaxial cables have been widely used in mobile communication systems in complex environments such as underground tu...

AI Technical Summary

Problems solved by technology

Their design does not take into account the polarization mismatch problem that may be caused by different polarization states of mobile communication terminals, and most of them are polarized in a single direction

However, the antenna of the mobile communication terminal does not always maintain a single polarization state, such as a mobile phone in the subway, the antenna may be in any polarization state during operation, so the existing leaky coaxial cable system may appear due to the leaky coaxial cable and mobile Large radio wave fading caused by terminal polarization mismatch

In addition, the design of the existing leaky coaxial cable does not consider the influence of the slit on the leaky coaxial cable on the characteristic impedance of the leaky coaxial cable, so it is easy to cause the reflection at the slit caused by the sudden change of the characteristic impedance of the leaky coaxial cable Larger, strong reflection at the resonance point, increased transmission loss, etc. For example, the short transverse slots in the L-shaped and U-shaped slot structures will cause a jump in the characteristic impedance of the leaky coaxial cable, so the reflection at this place is strong

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