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A RF front-end structure applied to GNSS dual-frequency receiver

A radio frequency front-end and receiver technology, which is applied in the field of radio frequency communication, can solve the problems of complex front-end structure and cost increase of GNSS dual-frequency receiver, and achieve the effects of reducing area, improving performance and reducing cost

Active Publication Date: 2022-04-19
杭州中科微电子有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention mainly solves the problem in the prior art that the signal at the output end of the broadband low noise amplifier needs to be connected to a power divider to drive the circuit module, which increases the cost and makes the front-end structure of the GNSS dual-frequency receiver more complicated. RF front-end structure of GNSS dual-frequency receiver

Method used

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  • A RF front-end structure applied to GNSS dual-frequency receiver
  • A RF front-end structure applied to GNSS dual-frequency receiver
  • A RF front-end structure applied to GNSS dual-frequency receiver

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Embodiment 1

[0026] In this embodiment, a radio frequency front-end structure applied to a GNSS dual-frequency receiver, such as image 3 As shown, it includes a dual-frequency antenna 1, a broadband low-noise amplifier 2 and an SOC processing chip 4. The dual-frequency antenna 1 is connected to the input terminal of the broadband low-noise amplifier 2, and the output terminal of the broadband low-noise amplifier is divided into two branches. After being connected to the circuit module 3, they are respectively connected to the radio frequency input terminals of the SOC processing chip 4.

[0027] Dual-frequency antenna is an antenna specially used to receive dual-frequency signals. It has two working frequency bands and can simultaneously receive GNSS high-frequency band signals such as GPS L1 and BDS B1 and GNSS low-frequency band signals such as GPS L2 / L5 and BDS B2 / B3. Signal, the dual-frequency antenna includes an antenna output port with an impedance of 50Ω, and the dual-frequency anten...

Embodiment 2

[0038] This embodiment presents the second RF front-end structure applied to GNSS dual-frequency receivers. In order to target SOC processing chips of some special GNSS receivers, the front-end structure is modified and deformed. like Figure 4 As shown, the difference from Embodiment 1 is that the SOC processing chip in this embodiment only includes a first RF input port 41 with a characteristic impedance of 50Ω. In order to obtain performance optimization, the first circuit module and the second circuit must be used The module pre-processes the signal. When only the SOC processing chip has only one first radio frequency input port, a power combiner 5 is added behind the first circuit module and the second circuit module. The radio frequency output end of the first circuit module and the radio frequency output end of the second circuit module are respectively connected to the input end of the power combiner, and the output end of the power combiner is connected to the first r...

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Abstract

The invention discloses a radio frequency front-end structure applied to a GNSS dual-frequency receiver. It solves the problem in the prior art that the signal at the output end of the broadband low-noise amplifier needs to be connected to a power divider to drive the circuit module, which increases the cost and makes the front-end structure of the GNSS dual-frequency receiver more complicated. The structure includes a dual-frequency antenna, a broadband low-noise amplifier and a SOC processing chip. The dual-frequency antenna is connected to the input end of the broadband low-noise amplifier, and the output end of the broadband low-noise amplifier is divided into two branches, and the two branches are connected respectively after connecting the circuit module. On the RF input of the SOC processing chip. The output end of the broadband low-noise amplifier of the invention is directly connected with two subsequent circuit modules, eliminating the need for a power divider and greatly reducing the cost of the receiver; without the need for a power divider, the area of ​​the receiver is reduced and the receiver is improved. The integration level of the system; the insertion loss of the power divider is eliminated, the circuit complexity is reduced, and the performance of the receiver is improved.

Description

technical field [0001] The invention relates to the technical field of radio frequency communication, in particular to a radio frequency front-end structure applied to a GNSS dual-frequency receiver. Background technique [0002] With the rapid development of aerospace, space satellites and communications, Global Navigation Satellite System (GNSS, Global Navigation Satellite System) has developed rapidly in military and civilian fields, and has become an indispensable part of national economic development and people's lives. With the continuous development of technology, the requirements for navigation receivers are also constantly increasing, improving positioning and timing accuracy, reducing receiver power consumption, adding some auxiliary functions, etc., have become the current research hotspots in the field of satellite navigation in recent years. At present, GNSS mainly includes GPS (Global Position System) of the United States, GLONASS of Russia, Galileo of the Euro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/36
CPCG01S19/36
Inventor 罗彦彬钱敏甘业兵金玉花
Owner 杭州中科微电子有限公司
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