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Wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna

A four-arm helix and wide beam technology, applied in the field of wide-beam frequency reconfigurable printed four-arm helix navigation antenna, to achieve excellent axial ratio and circular polarization bandwidth, improve low elevation gain, and widen beam width.

Pending Publication Date: 2022-04-05
中国船舶重工集团公司第七二三研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The four satellite navigation systems of GPS, GLONESS, GALILEO, and BDS continue to develop and mature, but due to external influences such as space channel multipath signal interference and electromagnetic interference of various radio frequency devices, there will inevitably be certain errors in the use of a single navigation system, so A multi-mode compatible design with high fault tolerance is imperative

Method used

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  • Wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna
  • Wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna

Examples

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Embodiment

[0027] Such as figure 1 As shown, a wide-beam frequency reconfigurable printed four-arm helical navigation antenna covering the L-band, including independent lower helix, upper helix and parasitic element 10, the antenna adopts a separate structure, the lower helix probe feeds, and the upper helix Coupled feed, by adjusting the relative position of the two parts to achieve frequency band transfer.

[0028] Such as figure 2 As shown, the circular polarization of the navigation antenna directly feeds the lower helical structure through four feeding probes 7 , and the upper helical structure and parasitic elements 10 feed through coupling.

[0029] The upper spiral body includes a second dielectric sheet 2, a second helical arm 4 printed on the second dielectric sheet 2, a second short-circuit connection arm 9 printed on the second dielectric sheet 2, and a first supporting second dielectric sheet 2. 2. Mechanical structure 6;

[0030] The lower spiral body includes a first d...

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Abstract

The invention discloses a wide-beam frequency-reconfigurable printed four-arm spiral navigation antenna which comprises an independent lower spiral body, an independent upper spiral body and an independent parasitic oscillator. The upper spiral body comprises a second dielectric sheet, a second spiral arm printed on the second dielectric sheet, a second short circuit connecting arm printed on the second dielectric sheet and a second mechanical structure for supporting the second dielectric sheet; the lower spiral body comprises a first dielectric sheet, a first spiral arm printed on the first dielectric sheet, a first mechanical structure supporting the first dielectric sheet and a feed probe arranged on the bottom floor. The bottom floor is provided with four probes for feeding, feeding is carried out through the four probes at the bottom, and the circular polarization characteristic of the antenna is achieved by endowing four signals which are equal in amplitude and have the phase difference of 90 degrees in sequence. According to the invention, a single structure covers a global navigation frequency band and broadens a directional diagram wave beam, the gain at a low elevation angle is improved, the anti-interference capability is enhanced, and the antenna has the characteristic of miniaturization when being used as a single-frequency-band antenna.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a wide-beam frequency reconfigurable printed four-arm helical navigation antenna. Background technique [0002] The satellite navigation system was first established by the United States in the 1970s and used in the field of military confrontation. Since its development, it has occupied an important position in the fields of transportation and logistics, agricultural and forestry production, and aerospace. The four satellite navigation systems of GPS, GLONESS, GALILEO, and BDS continue to develop and mature, but due to external influences such as space channel multipath signal interference and electromagnetic interference of various radio frequency devices, there will inevitably be certain errors in the use of a single navigation system, so A multi-mode compatible design with high fault tolerance is imperative. The multi-mode design is more common in three forms: multi-frequenc...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q19/02H01Q15/24H01Q1/34
Inventor 蒋凯周锦文王长胜滕飞李哲
Owner 中国船舶重工集团公司第七二三研究所
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