CN-122026069-A - Ultra-wideband VU frequency band antenna and assembly method thereof

Abstract

The invention discloses an ultra-wideband VU frequency band antenna and an assembly method thereof, relating to the technical field of wireless communication antennas, and comprising a metal bottom plate, a radiator branch, a radio frequency connector and a feeder line; the radiator and the radio frequency connector are respectively arranged on two sides of the metal bottom plate, the radiator comprises a lower array, an upper array and a cross beam, the arm lengths of the lower array and the upper array are unequal in electric length to form an asymmetric dipole structure, the middle parts of the lower array and the upper array are connected through the cross beam in a supporting mode, the lower array and the upper array are of inclined structures to form a special-shaped I-shaped structure, the cross beam is a leading-out position of a branch joint of the radiator, a radiation gap is formed between the lower array and the upper array, and a feeder line is used for connecting the radio frequency connector and the branch joint of the radiator. The ultra-short wave antenna has the advantages of ensuring the unchanged external dimension of the antenna, higher gain, fewer introduced components and single port, and effectively expanding the bandwidth of the traditional ultra-short wave antenna.

Inventors

• LI CONG
• WU JUNJUN
• YUAN NAN
• LI HANG
• ZHANG JINGLUN
• LIU YANG

Assignees

• 西安远方航空技术发展有限公司

Dates

Publication Date

20260512

Application Date

20260408

Claims (9)

1. 1. The ultra-wideband VU frequency band antenna is characterized by comprising a metal bottom plate, a radiator branch, a radio frequency connector and a feeder line; The radiator and the radio frequency connector are respectively arranged at two sides of the metal bottom plate; The radiator comprises a lower array, an upper array and a cross beam, wherein the arm lengths of the lower array and the upper array are unequal in electric length to form an asymmetric dipole structure, the middle parts of the lower array and the upper array are connected through the cross beam support, and the lower array and the upper array are of inclined structures to form a special-shaped I-shaped structure; the beam is the leading-out position of the radiator branch, and a radiation gap is formed between the lower array and the upper array; the feeder is used for connecting the radio frequency connector with the radiator branch.
2. 2. The ultra-wideband VU frequency band antenna of claim 1 wherein the tilt angle of the lower and upper arrays is 5 ° to 15 °.
3. 3. The ultra-wideband VU frequency band antenna of claim 1 wherein the radiating slot is 3 mm-8 mm.
4. 4. The ultra-wideband VU frequency band antenna of claim 1 wherein the arm lengths of the lower and upper elements are not physically equal.
5. 5. The ultra-wideband VU frequency band antenna of claim 4 wherein the upper array is configured to excite a low frequency fundamental mode, and the physical length of the arm length of the upper array is 0.09-0.11 times the free space wavelength of the lowest frequency point of the antenna.
6. 6. The ultra-wideband VU frequency band antenna of claim 5 wherein the lower array is configured to implement high frequency resonance, and the physical length of the arm length of the lower array is 0.15-0.25 times the free space wavelength of the highest frequency point of the antenna.
7. 7. The ultra-wideband VU frequency band antenna of claim 6 wherein the ratio of the physical length of the arm length of the upper array to the physical length of the arm length of the lower array is 1.8:1-2.5:1.
8. 8. The ultra-wideband VU frequency band antenna of claim 1 wherein said lower and upper elements are of a gradual change in width, said width being perpendicular to the arm lengths of said lower and upper elements.
9. 9. An assembling method of an ultra-wideband VU frequency band antenna, which is characterized in that the assembling method is used for assembling the ultra-wideband VU frequency band antenna according to any one of claims 1-8, and the method comprises the following steps: Fixing a radiator on one side of a metal bottom plate, and fixing a radio frequency connector on the middle part of the other side of the metal bottom plate; And the inner conductor of the radio frequency connector is connected with the tail end of the branch knot of the radiator through a feeder line, so that non-central feeding is realized.

Description

Ultra-wideband VU frequency band antenna and assembly method thereof Technical Field The invention relates to the technical field of wireless communication antennas, in particular to an ultra-wideband VU frequency band antenna and an assembly method thereof. Background The ultrashort wave communication mainly uses space waves for signal transmission, has various antenna forms, can be generally divided into an omni-directional antenna and a directional antenna according to different application scenes, and relates to two polarization modes of vertical polarization and horizontal polarization. With the evolution of wireless communication technology and the rapid development of aviation industry, higher requirements are also put on the working bandwidth of the ultra-short wave antenna. Aiming at the requirement, the bandwidth of the antenna is mainly expanded by adopting a first and loading technology, comprising resistance loading and capacitance loading, wherein the resistance loading refers to the mode of loading a resistor at a proper position of an antenna structure, current distribution is improved, reflection is reduced, and therefore, the bandwidth of the antenna is expanded, and the capacitance loading refers to the mode of introducing a capacitance element into the antenna structure, so that the equivalent circuit parameters of the antenna are changed, and the bandwidth of the antenna is effectively expanded. And secondly, the technology of multiple branches introduces a plurality of adjacent resonance points by increasing the number of the branches of the antenna or adjusting the length of the branches of the antenna, so that the antenna can maintain good working characteristics in a wider frequency range. Thirdly, in the broadband matching network technology, the matching degree between the input impedance of the antenna and the feed system is optimized by designing a specific matching network, so that the reflection loss is reduced, and the working bandwidth is expanded. Fourth, antenna shape and structure modification technology adopts asymmetric, gradual change or bending structural forms, increases equivalent electric length of the antenna and changes current path, thereby improving bandwidth special effect. Fifth, the combined antenna technology combines a plurality of antenna units with different frequency characteristics, and the whole system realizes broadband operation through reasonable feed and phase control. Sixth, new material application, utilize metamaterial or magnetic material etc. to have special electromagnetic characteristic new material, promote antenna performance and widen the bandwidth. Seventh, parasitic element technology is added, that is, parasitic elements are arranged around the main radiating element, and the bandwidth characteristics of the antenna are improved by using the coupling effect between the parasitic elements and the main element. In practical engineering application, the antenna design often needs to comprehensively use the above methods according to specific requirements of working frequency, gain index, size limitation and the like, so as to realize the broadband design of the ultrashort wave antenna. It is worth noting that the loading technology and the broadband matching network technology can improve current distribution by introducing components such as resistors and capacitors to expand bandwidth, but the reliability of the antenna is possibly reduced due to the increase of the components, the combined antenna technology can integrate the antennas with a plurality of frequency bands into the same structure to expand the whole bandwidth, but the bandwidth of the antenna with only a single radio frequency interface is not substantially improved, and the method of superconducting materials or magnetic materials and the like is adopted, so that the bandwidth performance can be effectively improved, but the cost is relatively high, and the popularization of partial application scenes is limited. Disclosure of Invention The ultra-wideband VU frequency band antenna and the assembly method thereof can effectively expand the bandwidth of the traditional ultra-short wave antenna while ensuring that the external dimension of the antenna is unchanged, the gain is higher, the introduced components are fewer and the antenna is single-port, so as to overcome the defects that the reliability of the loading technology is reduced due to the introduced components, the single-port antenna bandwidth cannot be improved by the combined antenna technology, the application cost of a new material is too high, and the like. In order to achieve the above purpose, the invention adopts the following technical scheme: In a first aspect, the invention provides an ultra-wideband VU frequency band antenna, comprising a metal base plate, a radiator branch, a radio frequency connector and a feeder line; The radiator and the radio frequency connector are respectively arranged at two