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Small-sized double-frequency active navigation antenna device

An antenna device, a small technology, applied in antennas, resonant antennas, electrical short antennas, etc., can solve the problems of high filter insertion loss, weak anti-interference ability, long switching time, etc., to achieve favorable reception and enhanced anti-interference ability , the effect of simple circuit

Inactive Publication Date: 2013-04-03
GUANGZHOU HI TARGET NAVIGATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] (3) The internal and external antenna switching circuits mostly use software control circuit switching (soft switching). The disadvantages are that the operation is cumbersome, the switching time is long, and the circuit is complicated.
The pre-filter scheme can improve the anti-interference ability, but because of the high insertion loss of the filter, it often results in a high noise figure
Do not use the pre-filter scheme, often weak anti-interference ability

Method used

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  • Small-sized double-frequency active navigation antenna device
  • Small-sized double-frequency active navigation antenna device
  • Small-sized double-frequency active navigation antenna device

Examples

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Embodiment Construction

[0046] The purpose of this embodiment is to design a small dual-frequency active navigation antenna device, which can work in multiple satellites and dual frequency bands, including a double-layer stacked microstrip patch device, a feed network, a low-noise amplifier circuit, and a suppression board (suppression board) and internal and external antenna switching devices.

[0047] The device consists of a double-layer superimposed microstrip patch device to receive the L1 and L2 frequency bands of the Global Navigation Satellite System (GNSS) respectively, and is connected to the phase shift feed network combination circuit under the antenna device through the coaxial feed of the double feed point. , and then output through a low insertion loss filter, a low noise amplifier, a high rejection filter, and a high gain amplifier, and then combine with another frequency band for output, and then amplify. The output port is divided into a built-in antenna output port and an external ...

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Abstract

The invention provides a small-sized double-frequency active navigation antenna device which comprises a suppression plate, a first microstrip patch, a second microstrip patch, a first substrate and a second substrate. The first microstrip patch is arranged on the top face of the first substrate, the second microstrip patch is arranged on the top face of the second substrate, the second microstrip patch is arranged between the first substrate and the second substrate, and the second substrate is arranged on the top face of the suppression plate; the first microstrip patch, the second microstrip patch, the first substrate and the second substrate are arranged in a 45 degrees inclined angle in an axial direction with the suppression plat. The device improves the the axial ratio, the impedance bandwidth, the stability of a phase center of the antenna, the signal receiving ability of a low elevation GNSS (Global Navigation Satellite System) and an ability to resist multipath interference, and the placing form of the antenna microstrip patch is more applicable to the actual handheld device application. By means of a combination way of a low insertion loss filter and a out-of-band high suppression filter, the noise figure is low and the antijamming capability is improved. The inside antenna and the outside arranged antenna have the advantages of being quick in switching speed, simple in operation and high in insulation.

Description

technical field [0001] The invention relates to the design of a microstrip antenna in the communication field, in particular to the application of a dual-frequency active antenna in the field of satellite navigation and surveying and mapping, and in particular to a small dual-frequency active navigation antenna device. Background technique [0002] Since satellite navigation can provide navigation, positioning and timing with full-time, all-weather, high-precision, continuous and real-time characteristics, it is widely used in various fields such as navigation, surveying and mapping, monitoring, timing, and communication. Therefore, in economic development, scientific research, Disaster prevention and control and the military field are playing an increasingly important role, making great contributions to national defense security and economic construction. The Global Navigation Satellite System (GNSS) application industry represented by the US GPS (Global Positioning System,...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q3/24H01Q9/04H01Q9/06H01Q13/08H01Q21/30H01Q23/00
CPCH01Q9/0414
Inventor 鲍志雄李庚禄黄俊铭
Owner GUANGZHOU HI TARGET NAVIGATION TECH
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