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Electrical length determination method of compensation wires and Doherty power amplifier

A technology for power amplifiers and determining methods, applied in power amplifiers, improving amplifiers to improve efficiency, etc., can solve the problems of adding, implementing complexity, and affecting the power bandwidth of Doherty power amplifiers, etc., to achieve the effect of high efficiency and wide power bandwidth

Active Publication Date: 2019-02-01
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above method can expand the efficiency bandwidth of the Doherty power amplifier to a certain extent, it will also bring other problems, such as affecting the power bandwidth of the Doherty power amplifier, requiring addition of other devices, complicated implementation or only for Some power amplifier tube devices are effective and so on

Method used

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  • Electrical length determination method of compensation wires and Doherty power amplifier
  • Electrical length determination method of compensation wires and Doherty power amplifier
  • Electrical length determination method of compensation wires and Doherty power amplifier

Examples

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no. 1 example

[0045] The embodiment of the present invention provides a Doherty power amplifier 100, which can work normally at full power and has wider bandwidth and higher efficiency when the input power backs off.

[0046] see figure 1 , is a functional block diagram of the Doherty power amplifier 100 provided by the embodiment of the present invention. The Doherty power amplifier 100 includes: a signal input terminal 110, a power divider 120, a first input matching circuit 130, a main power amplifying circuit 150, a second input matching circuit 140, a peak power amplifying circuit 160, a first compensation line 170, a first Two compensation lines 180 and an impedance transformation network 190 . Wherein, the signal input terminal 110 is electrically connected with the power divider 120, and the power divider 120 is electrically connected with the first input matching circuit 130 and the second input matching circuit 140 respectively, the first input matching circuit 130, the main powe...

no. 2 example

[0086] An embodiment of the present invention provides a method for determining the electrical length of a compensation line, which is used to calculate the electrical length of the compensation line of the Doherty power amplifier 100 described in the first embodiment. It should be noted that the basic principles and technical effects of the Doherty power amplifier 100 described in the embodiment of the present invention are the same as those of the above-mentioned embodiment. corresponding content in the example. see Figure 8 , is a flowchart of a method for determining the electrical length of a compensation line provided by an embodiment of the present invention. The method for determining the electrical length of the compensation line includes:

[0087] Step S501: Determine the demand value of the power backoff point of the Doherty power amplifier 100 based on the preset signal peak-to-average ratio.

[0088] It should be noted that the demand value of the power backof...

no. 3 example

[0100] see Figure 10 , is a functional block diagram of the radio frequency transmitter 200 provided by the embodiment of the present invention. The radio frequency transmitter 200 includes an antenna 210, a filter 220, a mixer 230, an IF amplifier 240, an IF filter 250 and the Doherty power amplifier 100 provided by the first embodiment. Wherein, the intermediate frequency filter 250, the intermediate frequency amplifier 240, the mixer 230, the power amplifier, the filter 220 and the antenna 210 are electrically connected in sequence.

[0101] The radio frequency transmitter 200 provided by the embodiment of the present invention improves the performance and efficiency of the entire radio frequency transmitter 200 by applying the above-mentioned Doherty power amplifier 100, so as to achieve the effect of saving electricity costs, and also contributes to green energy saving and emission reduction. important contribution.

[0102] In summary, the method for determining the e...

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Abstract

The embodiment of the invention provides an electrical length determination method of compensation wires and a Doherty power amplifier, and relates to the technical field of the communication. The Doherty power amplifier comprises a main power amplification circuit, a peak power amplification circuit, a first compensation wire and a second compensation wire; the main power amplification circuit iselectrically connected with the first compensation wire, the peak power amplification circuit is electrically connected with the second compensation wire, and the first compensation wire and the second compensation wire are electrically connected to form a compound point. Since the electrical length of each of the first compensation wire and the second compensation wire is provided through the electrical length determination method of the compensation wires, and is computed and acquired according to a power rollback point demand value determined based on a preset signal peak-to-average ratioand a peak power ratio, namely, the actual power rollback point of the Doherty power amplifier provided by the invention is determined according to actual demands, therefore, relatively high power under the power rollback condition can be guaranteed, and the normal work at the full power is guaranteed, and the Doherty power amplifier has relatively wide power bandwidth.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method for determining the electrical length of a compensation line and a Doherty power amplifier. Background technique [0002] In a modern wireless communication system, a radio frequency transceiver is a very important component of a radio remote unit (Radio Remote Unit, RRU) of a base station. The power amplifier is the most critical part of the transceiver, and the performance of the power amplifier will play a decisive role in the performance of the entire RRU. Therefore, various types of power amplifiers are applied, and the Doherty structure power amplifier is widely used. However, in practical applications, although the traditional Doherty structure power amplifier still has high efficiency under back-off, due to the impedance transformation characteristics of the Doherty structure power amplifier itself, its efficiency bandwidth is difficult to achieve a very w...

Claims

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Application Information

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IPC IPC(8): H03F1/07H03F3/24
CPCH03F1/07H03F3/24Y02D30/70
Inventor 侯地哈
Owner NEW H3C TECH CO LTD
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