Radio frequency front-end analog compensation circuit

An analog compensation and RF front-end technology, applied to electrical components, improved amplifiers to reduce temperature/power supply voltage changes, and amplification control, etc., can solve problems such as poor temperature sensitivity and poor real-time adjustment, and achieve strong real-time performance and control range big effect

Pending Publication Date: 2020-02-14
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

When the temperature compensation attenuator is set, it is far away from the heat source, the temperature sensitivity is poor, and the real-time adjustment is poor

Method used

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  • Radio frequency front-end analog compensation circuit

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Embodiment Construction

[0015] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] The RF front-end analog compensation circuit of the present invention needs to realize that when the temperature changes, it can sense the temperature of the existing module through the temperature sensor, and then control the gate voltage of the final amplifier through the operational amplifier, thereby controlling the output power at full temperature.

[0017] The present invention is a radio frequency front-end analog compensation technology, and its circuit principle diagram can be found in figure 1 , the RF front-end analog compensation circuit includes a first amplifier 1, a second amplifier 2, an isolator 3, an antenna 4, a temperature sensor 5 and a differential operator 6, and the temperature sensor 5 is...

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Abstract

The invention discloses a radio frequency front-end analog compensation circuit, which comprises a first amplifier (1), a second amplifier (2), an isolator (3), an antenna (4), a temperature sensor (5) and a differential arithmetic unit (6), and is characterized in that the temperature sensor (5) is arranged at the periphery of the second amplifier (2) and is used for acquiring temperature changein real time; a radio frequency signal passes through the first amplifier (1) and the second amplifier (2) and then is radiated out through the isolator (3) and the antenna (4). Along with the increase of the working time, the temperature of the amplifier module is increased due to the heat consumption generated by the second amplifier (2), the voltage value acquired by the temperature sensor (5)is changed, and the grid bias voltage of the second amplifier (2) is compensated through the change result obtained by differential operation of the variable quantity of the temperature sensor (5) through the differential arithmetic unit (6). The circuit can sense the temperature change of a heat source in real time, correspondingly adjusts circuit gain, is large in control range, and is high in real-time performance.

Description

technical field [0001] The invention belongs to the related technical field of radio frequency front-end circuit design based on data link wireless communication links, and relates to a radio frequency front-end analog compensation circuit, in particular to a circuit gain analog compensation technology of a radio frequency front-end module, the radio frequency front-end module has analog conditions under the temperature compensation function. Background technique [0002] In the data link wireless communication link, the RF front-end module, as an essential component, plays a pivotal role. However, due to the material characteristics of radio frequency devices, the gain output will change as the temperature changes, so that the output power will also change with the temperature change. The inherent change law of radio frequency devices is: at high temperature, the gain decreases, and the output power decreases; at low temperature, the gain increases, and the output power in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/30H03G3/20
CPCH03F1/30H03G3/20
Inventor 刘震
Owner TIANJIN JINHANG COMP TECH RES INST
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