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Adjustment method for matching network circuit, radio frequency power amplifier and radio frequency signal

A technology of matching network and radio frequency power, applied in the field of radio frequency, can solve the problem of reducing the output performance of the power amplifier, and achieve the effect of improving the output performance

Active Publication Date: 2021-02-12
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, mismatches and asymmetries (e.g., amplitude differences and / or phase differences) between differential signals degrade the output performance of the power amplifier

Method used

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  • Adjustment method for matching network circuit, radio frequency power amplifier and radio frequency signal
  • Adjustment method for matching network circuit, radio frequency power amplifier and radio frequency signal
  • Adjustment method for matching network circuit, radio frequency power amplifier and radio frequency signal

Examples

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Embodiment Construction

[0017] figure 1 A schematic diagram illustrating the principle of the matching network circuit 10 and the corresponding equivalent circuits in differential mode (odd order) and common mode (even order). Matching network circuit 10 is used for radio frequency (radio-frequency, RF) amplifier, comprises two capacitors C 1 , inductor L 1 , differential input nodes A and A’, and node B. The RF input signal is split into two identical signals in common mode or two signals 180 degrees out of phase with each other in differential mode, which are input to differential input nodes A and A', respectively. The matching network circuit 10 is symmetrical about the Node B structure. Capacitor C 1 Coupled between node B and differential input node A and between node B and differential input node A’, inductor L 1 Connect between Node B and ground.

[0018] In differential mode, since there is a perfect electric wall at node B, node B can be used as a virtual short circuit or a virtual gr...

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PUM

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Abstract

The invention provides a matching network circuit, a radio frequency power amplifier and a method for adjusting radio frequency signals. The matching network circuit includes: first and second input nodes respectively receiving first and second signal components of the radio frequency input signal, a first signal path of the first signal component is formed between the first input node and the first output node , the second signal path of the second signal component is formed between the second input node and the second output node; the first and second differential mode notch filters having a differential mode resonant frequency are respectively coupled to the radio frequency input signal between the first signal path shape and the second signal path shape and the symmetric node; and a passive network circuit comprising passive components and coupled to ground and the symmetric node, a common mode notch filter having a common mode resonant frequency comprising a first One of the first and second differential mode notch filters and a passive network circuit. The invention improves the output performance of the matching network circuit and the power amplifier using the matching network circuit.

Description

technical field [0001] The invention relates to the radio frequency field, in particular to a matching network circuit, a power amplifier and a radio frequency signal adjustment method for adjusting the symmetry of differential signals of the power amplifier. Background technique [0002] Differential-mode operation is typically used for common-mode noise rejection. It can be used in many circuits, such as power amplifier (power amplifier, PA), low noise amplifier (low noise amplifier, LNA), mixer and so on. [0003] Usually, the power amplifier is required to provide high swing and low output impedance at its output terminal, so the matching network or circuit needs to provide appropriate impedance changes for multiple frequency bands to achieve low output impedance at its output terminal in differential mode. In addition, mismatches and asymmetries (eg, amplitude differences and / or phase differences) between differential signals can degrade the output performance of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/56H03F3/45H03F3/21H03H7/01H03H7/40H03F3/19
CPCH03F1/56H03F3/19H03F3/211H03F3/45076H03H7/01H03H7/40H03F2200/451H03F2200/171H03F1/3211H03F1/565H03F3/26H03F3/45071H03F2200/387H03F2200/411H03H7/38H03F2203/45116
Inventor 高瑞智蔡明达曾柏森
Owner MEDIATEK INC