一种简单的超宽带端馈全向天线

Abstract

本实用新型公开了一种简单的超宽带端馈全向天线，涉及天线技术领域，包括主辐射体、寄生辐射体、底座、馈电结构、寄生辐射体支撑块、天线壳体，主辐射体包括下臂辐射体和上臂辐射体，下臂辐射体固定在底座上，寄生辐射体设置在主辐射体上，寄生辐射体包括中心套筒、下臂偏置套筒、上臂偏置套筒，寄生辐射体支撑块设置在主辐射体与寄生辐射体之间，馈电结构为半柔同轴线，半柔同轴线设置在下臂辐射体内，半柔同轴线一端连接有N型连接器，N型连接器固定在底座上。有益效果在于：该天线基于传统的套筒偶极子天线原理设计而成，具有10个倍频程的阻抗带宽，未使用集总元件加载，带内水平面全向增益高，全向特性好，结构设计简单，便于装配。

Claims

1. A simple ultra-wideband end-fed omnidirectional antenna, characterized by: The antenna includes a main radiator, a parasitic radiator, a base (9), a feeding structure, a parasitic radiator support block, and an antenna housing (10). The main radiator includes a lower arm radiator (1) and an upper arm radiator (2). The lower arm radiator (1) is fixed on the base (9). The parasitic radiator is disposed on the main radiator and includes a central sleeve (3), a lower arm offset sleeve (4), and an upper arm offset sleeve (5). The parasitic radiator support block is disposed between the main radiator and the parasitic radiator. The feeding structure is a semi-flexible coaxial line (12). 2) The semi-flexible coaxial line (12) is installed inside the lower arm radiator (1). One end of the semi-flexible coaxial line (12) is connected to an N-type connector (11). The N-type connector (11) is fixed on the base (9). The other end of the lower arm radiator (1) is connected to the lower arm radiator (1) and the upper arm radiator (2). The outer conductor of the semi-flexible coaxial line (12) is fixed together with the lower arm radiator (1). The inner conductor of the semi-flexible coaxial line (12) passes through the upper arm radiator (2) and is fixed together. The antenna housing (10) is installed outside the main radiator and the parasitic radiator.

2. The simple end-fed omnidirectional antenna of claim 1, wherein: The lower arm radiator (1) has a multi-segment stepped structure, which is divided into the lower arm lower section (13), the lower arm middle section (14), and the lower arm upper section (15), with the diameter increasing from top to bottom. The lower arm upper section (15) is fitted with a lower arm offset sleeve (4).

3. The simple end-fed omnidirectional antenna of claim 2, wherein: The lower arm lower section (13), the lower arm middle section (14), and the lower arm upper section (15) are all hollow cavity structures. The lower arm middle section (14) and the lower arm upper section (15) are processed into an integral structure. The lower arm lower section (13) and the lower arm middle section (14) are connected by threads.

4. The simple end-fed omnidirectional antenna of claim 1, wherein: The upper arm radiator (2) has a multi-segment stepped structure, divided into a lower upper arm segment (16), a middle upper arm segment (17), and an upper upper arm segment (18), with the diameter decreasing from top to bottom. The lower upper arm segment (16) is fitted with an upper arm offset sleeve (5).

5. The simple end-fed omnidirectional antenna of claim 4, wherein: The lower section (16), the middle section (17), and the upper section (18) of the upper arm are all hollow cavity structures. The lower section (16) and the middle section (17) of the upper arm are processed into an integral structure. The upper section (18) and the middle section (17) of the upper arm are connected by threads.

6. The simple end-fed omnidirectional antenna of claim 1, wherein: The characteristic impedance of the semi-flexible coaxial line (12) is 50Ω.

7. The simple end-fed omnidirectional antenna of claim 1, wherein: The central sleeve (3) includes two semi-circular sleeves (19) and a central sleeve fixing block (20), which combines the two semi-circular sleeves (19) into a cylindrical shape by screws.

Images