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Tunable impedance matching networks and tunable diplexer matching systems

A technology for tuning impedance and matching networks, which is applied in the field of tunable impedance matching networks and tunable duplexer matching systems, and can solve problems such as difficult tunable matching circuits

Inactive Publication Date: 2009-05-20
WISPRY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In wireless handheld devices, it has proven difficult to implement tunable matching circuits at frequencies above approximately 200MHz

Method used

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  • Tunable impedance matching networks and tunable diplexer matching systems
  • Tunable impedance matching networks and tunable diplexer matching systems
  • Tunable impedance matching networks and tunable diplexer matching systems

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Embodiment Construction

[0028] According to the disclosure of the present invention, a tunable impedance matching network and a tunable duplexer matching system are provided. The networks and systems described herein have particular application in impedance matching in wireless receiver and transmitter systems including components such as antennas and amplifiers. The system performance of these components is very sensitive to impedance mismatch. Improved impedance matching can improve the signal-to-noise ratio, efficiency, stability, linearity and bandwidth of these systems.

[0029] The tunable impedance matching network disclosed in the present invention includes an impedance element connected between the first node and the second node, and is used for transmitting signals between the first node and the second node. For example, an impedance element may be a transmission line or an inductor. Furthermore, the matching network may include a first capacitor connected in parallel with the impedance e...

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Abstract

Tunable impedance matching networks and tunable diplexer matching systems are provided. A tunable impedance matching network can include an impedance element connected between first and second nodes for communicating signals between the first and second nodes. For example, the impedance element can be a transmission line or an inductor. Further, the matching network can include a first capacitor connected in parallel with the impedance element, wherein the first capacitor is tunable. The matching network can also include a second capacitor comprising first and second terminals. The first terminal of the second capacitor can be connected to the first node. The second terminal of the second capacitor can be connected to a local voltage reference for the first node. A third capacitor comprises first and second terminals. The first terminal of the second capacitor can be connected to the second node. The second and third capacitors can also be tunable.

Description

[0001] related application [0002] The presently disclosed subject matter claims the benefit of U.S. Provisional Patent Application Serial No. 60 / 780544, filed March 8, 2006, and U.S. Provisional Patent Application Serial No. 60 / 780565, filed March 8, 2006, the disclosures of which are incorporated herein in their entirety For reference. technical field [0003] The subject matter disclosed herein relates to matching networks, systems and circuits. More specifically, the subject matter disclosed herein relates to tunable impedance matching networks and tunable duplexer matching systems. Background technique [0004] Matching circuits are used extensively to transform the impedance of various components within a circuit to a target reference impedance (e.g., transmission line impedance and / or test port impedance), or to directly match two components with different (possibly complex) impedances in order to Maximum power transfer. Typically, the matching circuit has two nod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50
Inventor A·S·莫里斯T·叶S·格里菲斯
Owner WISPRY INC