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A doherty power amplifier circuit

A power amplifying circuit and circuit technology, applied in the field of circuits, to achieve the effect of improving load-pulling effect and reducing production and operating costs

Active Publication Date: 2020-09-25
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inverse Doherty is an effective means to effectively broaden the bandwidth of the power amplifier, but the adoption of this technology requires the matching in the tube of the power amplifier, not every device is suitable for this technology
At present, most gallium nitride (GaN) devices do not have the technical conditions to adopt inverse Doherty, especially high-power devices. For this reason, GaN devices still need to adopt the traditional Doherty circuit structure and make technical improvements on the basis of it. Therefore, , it is necessary to redesign the Donherty circuit structure to improve its bandwidth

Method used

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  • A doherty power amplifier circuit
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Embodiment Construction

[0020] In order to overcome the narrow-band characteristics of the radio frequency Doherty power amplifier circuit, the present invention redesigns the Doherty circuit structure, while effectively improving the broadband performance of the Doherty power amplifier circuit, it realizes high-efficiency work that can simultaneously support multiple frequency bands.

[0021] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0022] refer to figure 1 As shown, in the embodiment of the present invention, the redesigned Doherty power amplifier circuit sequentially includes a power divider 1, a carrier (Carrier) amplifier branch 2, a (peak) Peaking amplifier branch 4 and a combiner 3, specifically, its The connection relationship is that the two ends of the power divider 1 are respectively connected to the Carrier amplifier branch 2 and the Peaking amplifier branch 4, and the other end of the Carrier amplifi...

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Abstract

The invention relates to circuit technology, and discloses a Doherty power amplifying circuit, which comprises a power divider (1), a Carrier amplifier branch (2), a combiner (3) and a Peaking amplifier branch (4), Wherein, a series resonant circuit (5) is arranged between the Carrier amplifier branch (2) and the combiner (3), so that the reactance introduced in the working process of the traditional Doherty power amplifier circuit can be neutralized, ensuring the Doherty power amplifier While the circuit is highly efficient, it improves the load-pull effect of the Doherty power amplifier circuit, making the load-pull effect more broadband, so as to realize communication equipment that supports multi-band and multi-standard work at the same time, and effectively reduces production and operation costs.

Description

technical field [0001] The invention relates to circuit technology, in particular to a Doherty power amplifying circuit. Background technique [0002] With the continuous development of communication technology, 2G, 3G and 4G communication standards coexist. Both equipment suppliers and network operators expect to realize communication equipment that can support multi-band and multi-standard work at the same time, so as to reduce equipment production and Network operation and maintenance costs. In addition, from the perspective of energy saving and emission reduction and green communication, while supporting multi-band and multi-standard work, communication equipment is also required to be highly efficient. As the most severely bandwidth-limited high-energy-consuming component in communication equipment, power amplifiers inevitably face the design challenges of broadband and high efficiency. [0003] Existing high-efficiency power amplifiers mostly use the traditional Dohe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/42H03F1/07H03F3/20
CPCH03F1/42H03F2200/451H03F1/565H03F2200/111H03F2200/222H03F2200/309H03F2200/387H03F1/0288H03F3/21
Inventor 艾宝强方杨杨世民
Owner DATANG MOBILE COMM EQUIP CO LTD