Near-air blind-area-free high-gain antenna and using method thereof

Abstract

The invention provides a near-air blind-area-free high-gain antenna and a using method thereof. A log-periodic antenna comprises a central mast, a first antenna oscillator and a second antenna oscillator, the central mast is provided with an antenna base with the same central axis, the central position of the antenna base is provided with an antenna matcher, a plurality of obliquely upward supporting rods are evenly distributed on the antenna base in the circumferential direction, the radial distance between the supporting rods and the central mast is gradually increased from bottom to top, the lower ends of the first antenna oscillator and the second antenna oscillator are connected with the antenna matcher, and the upper ends of the first antenna oscillator and the second antenna oscillator are symmetrical about the central axis. And the inner sides of the plurality of supporting rods are spirally and upwards expanded in the same direction. The width of the antenna is reduced by increasing the circumferential size of the antenna, so that the width of the antenna is greatly compressed, the erection difficulty of the antenna is reduced, and the high-gain requirement of near field communication is met.

Description

technical field [0001] The invention relates to the technical field of logarithmic periodical antennas, in particular to a high-gain near-space antenna with no dead zone and a method for using the same. Background technique [0002] The logarithmic periodic antenna is a kind of non-frequency-variable antenna. It has good broadband characteristics and is widely used in broadband wireless transmission. In the short-wave band, the log-periodic antenna is currently the only one that can use a pair of antennas to work in the entire short-wave band and maintain good electrical performance of the broadband antenna. [0003] The logarithmic periodic dipole antenna is the basic form of the logarithmic periodic antenna. It is formed by cross-connecting N parallel dipoles with double wires. The parallel dipoles on are of varying lengths and spacing, but remain parallel to each other. Therefore, the logarithmic periodic dipole antenna can also be regarded as a coplanar linear array fo...

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Problems solved by technology

like figure 1 As shown, the overall three-dimensional size of the antenna is too large, which brings a lot of trouble to the installation and site control of the antenna

[0005] In addition, in general, in order to achieve short-distance communication, communication stations often use short-distance antennas such as three-wire antennas and three-wire inverted V antennas to solve the problem of short-distance communication. However, due to the limitation of antenna radiation methods, the efficiency and gain of such antennas Both are low, and the log-periodic antenna with high gain is mostly used for long-distance communication, and radiates outward through low elevation angles. However, the log-periodic antenna with high gain is difficult to meet the high gain requirement at close range due to its strong directivity.

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