Configurable matching network used at satellite navigation radio frequency front end

Abstract

The invention discloses a configurable matching network used at a satellite navigation radio frequency front end. The configurable matching network comprises a set of parallel switch capacitor arrays, a set of parallel switch inductance arrays, a set of series switch inductance arrays and a set of series switch capacitor arrays. The configurable matching network can be used for matching impedance of various satellite navigation radio frequency receiver ports, changes equivalent capacitance or equivalent inductance value of a corresponding array through regulating and controlling the switch capacitor arrays and the switch inductance arrays, and is further matched with input impedance. The invention provides a matching tuning technology combining digit and analog and a digital signal control simulation circuit to realize matching of impedance. The configurable matching network is used inside an integrated circuit of a satellite navigation radio frequency receiver, realizes matching of networks through sending orders, is good in performance, convenient and quick to operate, saves time and cost for a developing process, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of wireless communication electronics, in particular to impedance matching for satellite navigation signal reception. Background technique [0002] The global satellite navigation and positioning systems in operation in the world mainly include: the GPS system of the United States, the GLONASS system of Russia, the Galileo of Europe and the Beidou satellite positioning system of China. Other countries are also actively developing their own satellite navigation and positioning systems. Therefore, the future global satellite positioning system will be a multi-system coexistence pattern. With the rapid development of information technology and the increasing demand for information, users urgently need to use the resources of multiple satellite navigation systems and adopt information fusion to effectively improve positioning accuracy. Therefore, receivers capable of supporting more than two satellite systems ...

AI Technical Summary

Problems solved by technology

After the external circuit design is completed, the values ​​of each component in the network are fixed. Although the matching combination of the network can be modified by manually replacing the components when adjustments are required, it is inconvenient to replace the components, and it is easy to artificially introduce non-ideal components. factors such as parasitics, resulting in a greater workload

Therefore, the traditional way of matching through external circuits is relatively rigid and very constrained, which increases a lot of inconvenience in R&D and increases the R&D cycle.

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