Miniaturized ultra-wideband omnidirectional airborne antenna based on backside resistive loading

Abstract

This invention discloses a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistive loading, comprising a first layer, a second layer, and a third layer arranged sequentially from top to bottom. The first layer has a pair of radiating bowtie dipoles, the ends of which are loaded with rectangular radiating plates to increase the radiating area, and the radiating bowtie dipoles are fed through a coaxial cable. The second layer is a dielectric layer. The third layer has a pair of reduced bowtie dipoles for resistive loading. This invention discloses a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistive loading, utilizing bowtie dipoles with rectangular plates loaded at their ends as radiating elements, and introducing reduced bowtie dipoles with resistive loading on the back side of the dielectric layer, achieving miniaturization and ultra-wideband performance exceeding existing designs.

Description

Technical Field

[0001] This invention belongs to the field of miniaturized ultra-wideband antenna technology, specifically relating to a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading. Background Technology

[0002] With the increasing integration of aviation platforms, airborne communication, navigation, and electronic countermeasures systems have placed urgent demands on antennas for both ultra-wideband and miniaturization. To reduce air resistance during high-speed flight and meet the stringent constraints of fuselage mounting space, antennas must adopt streamlined finned structures and minimize their physical size as much as possible. At the same time, to be compatible with multiple communication systems, antennas need to have good matching performance and omnidirectional horizontal radiation characteristics over an extremely wide frequency band.

[0003] However, wide bandwidth and miniaturization are contradictory performance indicators for antennas. Miniaturization often leads to increased Q-value and a sharp decrease in impedance bandwidth. In practical engineering design, how to suppress high-order mode interference, maintain radiation pattern consistency, and achieve efficient impedance matching over an extremely wide frequency band by optimizing the electromagnetic coupling structure within a limited low-profile fin size is the main technical challenge currently facing the field of airborne antennas. Summary of the Invention

[0004] The main objective of this invention is to provide a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading. It utilizes a bowtie-shaped dipole with a rectangular plate loaded at the end as the radiating element, and introduces a reduced bowtie-shaped dipole with resistance loading on the back side of the dielectric layer, thereby achieving miniaturization and ultra-wideband performance exceeding existing designs.

[0005] To achieve the above objectives, the present invention provides a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading, comprising a first layer, a second layer, and a third layer arranged sequentially from top to bottom, wherein: The first layer is provided with a pair of radiating bowtie dipoles. The ends of the radiating bowtie dipoles are loaded with rectangular radiating plates to increase the radiating area (increase the antenna gain). The radiating bowtie dipoles are fed through a coaxial cable. The second layer is a dielectric layer; The third layer is provided with a pair of reduced bowtie dipoles for resistive loading. The ends of the reduced bowtie dipoles are loaded with narrow rectangular plates, and the center of the pair of reduced bowtie dipoles is loaded with lumped resistors to improve the impedance matching of the antenna.

[0006] As a further preferred embodiment of the above technical solution, the inner conductor of the coaxial cable is connected to the dipole arm of a radiating bowtie dipole on one side, and the outer conductor of the coaxial cable is connected to the dipole arm of a radiating bowtie dipole on the other side.

[0007] As a further preferred technical solution of the above technical solution, the omnidirectional airborne antenna uses a radiating bowtie dipole with a rectangular radiating plate loaded at the end as the radiating unit, and introduces a resistor-loaded miniaturized bowtie dipole on the back side of the dielectric layer to achieve miniaturization and ultra-wideband performance.

[0008] As a further preferred technical solution to the above technical solution, the dielectric layer has a thickness of 0.254 mm, a length of 27 mm, and a width of 19.8 mm.

[0009] As a further preferred technical solution to the above technical solution, the coaxial cable is 50 ohms; the lumped resistor is packaged in 0402 and has a resistance of 82 ohms.

[0010] The beneficial effects of this invention are: (1) The present invention utilizes a bowtie dipole with a rectangular plate loaded at the end as a radiating unit and introduces a reduced bowtie dipole with resistance loading on the back side of the dielectric layer, thereby achieving miniaturization and ultra-wideband performance that exceeds existing designs.

[0011] (2) This invention achieves a very small electrical size ( ,in It achieves a very wide impedance bandwidth (1.9-6.7GHz) at the wavelength corresponding to the lowest operating frequency, and the average gain within the antenna operating band is about 2dBi, which is expected to become an airborne antenna solution for applications with limited installation space and requiring ultra-wideband and high gain. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 ; The reference numerals in the attached figures include: 1. Radial bowtie symmetrical dipole; 2. Coaxial cable; 3. Dielectric layer; 4. Shrink bowtie dipole; 5. Lumped resistance. Detailed Implementation

[0013] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0014] In the preferred embodiments of the present invention, those skilled in the art should note that the dielectric layer and the like involved in the present invention can be considered as prior art.

[0015] Preferred embodiment.

[0016] like Figures 1-3 As shown, this invention discloses a miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading, comprising a first layer, a second layer, and a third layer arranged sequentially from top to bottom, wherein: The first layer is provided with a pair of radiating bowtie dipoles 1. The ends of the radiating bowtie dipoles 1 are loaded with rectangular radiating plates to increase the radiating area (increase the antenna gain). The radiating bowtie dipoles 2 are fed through a coaxial cable. The second layer is dielectric layer 3; The third layer is provided with a pair of reduced bowtie dipoles 4 for resistive loading. The ends of the reduced bowtie dipoles 4 are loaded with narrow rectangular plates, and the center of the pair of reduced bowtie dipoles 4 is loaded with a lumped resistor 5 to improve the impedance matching of the antenna.

[0017] Specifically, the inner conductor of the coaxial cable 2 is connected to the dipole arm of the radial bowtie dipole 1 on one side, and the outer conductor of the coaxial cable 2 is connected to the dipole arm of the radial bowtie dipole 1 on the other side.

[0018] More specifically, the omnidirectional airborne antenna uses a radiating bowtie dipole 1 with a rectangular radiating plate loaded at the end as the radiating element, and a resistor-loaded miniaturized bowtie dipole 4 is introduced on the back side of the dielectric layer 3 to achieve miniaturization and ultra-wideband performance.

[0019] Furthermore, the dielectric layer 3 has a thickness of 0.254 mm, a length of 27 mm, and a width of 19.8 mm.

[0020] Furthermore, the coaxial cable 2 has a resistance of 50 ohms; the lumped resistor 5 uses a 0402 package and has a resistance of 82 ohms.

[0021] It is worth mentioning that the technical features such as the dielectric layer involved in this patent application should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be adopted using conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0022] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A miniaturized ultra-wideband (UWB) omni-directional airborne antenna based on backside resistive loading, characterized in that, This includes the first, second, and third layers arranged from top to bottom, where: The first layer is provided with a pair of radiating bowtie dipoles. The ends of the radiating bowtie dipoles are loaded with rectangular radiating plates to increase the radiating area. The radiating bowtie dipoles are fed through a coaxial cable. The second layer is a dielectric layer; The third layer is provided with a pair of reduced bowtie dipoles for resistive loading. The ends of the reduced bowtie dipoles are loaded with narrow rectangular plates, and the center of the pair of reduced bowtie dipoles is loaded with lumped resistors to improve the impedance matching of the antenna.

2. The miniaturized ultra-wideband (UWB) back-resistively loaded omni-directional airborne antenna according to claim 1, wherein, The inner conductor of the coaxial cable is connected to the dipole arm of a radiating bowtie dipole on one side, and the outer conductor of the coaxial cable is connected to the dipole arm of a radiating bowtie dipole on the other side.

3. A miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading according to claim 1, characterized in that, The omnidirectional airborne antenna uses a radiating bowtie dipole with a rectangular radiating plate loaded at the end as the radiating element, and introduces a resistor-loaded miniaturized bowtie dipole on the back side of the dielectric layer to achieve miniaturization and ultra-wideband performance.

4. A miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading according to claim 1, characterized in that, The dielectric layer has a thickness of 0.254 mm, a length of 27 mm, and a width of 19.8 mm.

5. A miniaturized ultra-wideband fin-shaped omnidirectional airborne antenna based on back-side resistance loading according to claim 1, characterized in that, The coaxial cable is 50 ohms; the lumped resistor is in a 0402 package and has a resistance of 82 ohms.

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