A satellite navigation radio frequency chip and system with temperature compensation
A technology of satellite navigation and temperature compensation, which is applied in the field of satellite navigation, can solve problems such as large volume, high power consumption, and complex system, and achieve the effects of improving system integration, simplifying design schemes, and reducing power consumption
Inactive Publication Date: 2017-11-14
XIAN HUAXUN MICROELECTRONICS
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Problems solved by technology
This solution requires a lot of hardware and software support, the system is complex, difficult to debug, large in size, high in power consumption, and difficult to miniaturize the anti-jamming receiver
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[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] refer to figure 1 , is a structural schematic diagram of a satellite navigation radio frequency chip with temperature compensation of the present invention; the satellite navigation radio frequency chip includes a first radio frequency switch 1, and the input terminal of the first radio frequency switch 1 inputs a satellite navigation signal; the first radio frequency switch 1 The output terminal is connected with the input terminal of the low noise amplifier, the output terminal of the low noise amplifier is connected with the input terminal of the mixer, the output terminal of the mixer is connected with the input terminal of the intermediate frequency filter, and the output terminal of the intermediate frequency filter It is connected with the input end of the variable gain amplifier, and the output end of the variable gain amplifie...
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The invention belongs to technical field of satellite navigation, and discloses a satellite navigation radio frequency chip with temperature compensating and a system thereof. The chip comprises a first radio frequency switch. An output terminal of the first radio frequency switch is connected to an input terminal of a low noise amplifier. An output terminal of the low noise amplifier is connected to an input terminal of a mixer. An output terminal of the mixer is connected to an input terminal of an intermediate frequency filter. An output terminal of the intermediate frequency filter is connected to an input terminal of a variable gain amplifier. The portion between first radio frequency switch and the low noise amplifier is connected to an output terminal of the second radio frequency switch through a bypass. An input terminal of the second radio frequency switch is connected to a noise source. A control terminal of the variable gain amplifier is connected to an output terminal of a power detection controller. An input terminal of the power detection controller is connected to an output terminal of the variable gain amplifier. The satellite navigation radio frequency chip has a temperature compensating function, simplifies a design scheme, raises a system integration degree, reduces a size and lowers power consumption.
Description
technical field [0001] The invention belongs to the technical field of satellite navigation, in particular to a satellite navigation radio frequency chip and system with temperature compensation. Background technique [0002] Since satellite navigation signals are susceptible to various intentional or unintentional interferences, the interference suppression of satellite navigation systems has become a research hotspot in the field of military communications. A key requirement for the RF front-end in anti-jamming receivers is to keep the gain stable. The change of temperature in various harsh and complex environmental conditions has a huge impact on the gain of the RF front-end, so the study of satellite navigation RF chips with temperature compensation has great military value and practical significance. [0003] The traditional satellite navigation radio frequency chip does not have the function of temperature compensation. The external temperature sensor and DSP (digital ...
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IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 申向顺周文益赵国良吕海凤汤玉玲杨韶姬晶
Owner XIAN HUAXUN MICROELECTRONICS