Lumped-parameter wideband 180-degree coupler with harmonic suppression function

A technology of harmonic suppression and lumped parameters, applied in impedance networks, electrical components, multi-terminal-pair networks, etc., to solve the problem of large occupied area of ​​180-degree couplers, poor bandwidth and harmonic suppression performance, and a small number of components used. problem, achieve excellent harmonic suppression function, meet the effect of miniaturization, and improve the working bandwidth

Inactive Publication Date: 2013-10-02
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a broadband 180-degree coupler with a harmonic suppression function of lumped parameters, which uses a small number of components, occupies a small area, has a wide operating freque...

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  • Lumped-parameter wideband 180-degree coupler with harmonic suppression function
  • Lumped-parameter wideband 180-degree coupler with harmonic suppression function
  • Lumped-parameter wideband 180-degree coupler with harmonic suppression function

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Embodiment Construction

[0022] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0023] like figure 1 As shown, a broadband 180-degree coupler with harmonic suppression function with lumped parameters includes four inductors and seven capacitors, which are the first inductor L1, the second inductor L2, the third inductor L3, and the fourth inductor L4, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6 and the sev...

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Abstract

The invention relates to a lumped-parameter wideband 180-degree coupler with a harmonic suppression function. The lumped-parameter wideband 180-degree coupler comprises seven capacitors and four inductors, wherein the seven capacitors are connected with three inductors so as to form double loops. Capacitor-inductor pairs are adopted to form resonance units so as to provide transmission zeros, such that the harmonic suppression function can be realized; a first connection point is connected with a first port; a second connection point is connected with a second port; a fourth connection point is connected with a third port; and a third connection point is grounded through one inductor, and therefore, secondary inductive coupling can be realized, and the operating bandwidth of the coupler can be expanded. The lumped-parameter wideband 180-degree coupler of the invention is advantageous in fewer used components, small occupied area and low implementation cost; and the lumped-parameter wideband 180-degree coupler can keep excellent output amplitude balance and phase balance in a very wide frequency range, and has factorable harmonic suppression ability, and is suitable for being used in existing handheld mobile radio frequency wireless communication systems.

Description

technical field [0001] The invention relates to the technical field of communication circuit components, in particular to a broadband 180-degree coupler with a lumped parameter and a harmonic suppression function. Background technique [0002] In modern communication systems, 180-degree couplers are often used in radio frequency and microwave millimeter wave circuits, such as balanced amplifiers, image rejection mixers, balanced frequency multipliers, etc. Especially in today's mobile electronic communication market, with the development of multi-band and multi-mode technology, radio frequency transceivers that can simultaneously meet various frequency bands and communication standards have become the current development direction . [0003] As an important device in the transceiver system, the demand for broadband 180-degree couplers is constantly increasing. Most of the traditional 180-degree couplers currently popular use microstrip structures, such as Marchand baluns, ...

Claims

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Application Information

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IPC IPC(8): H03H7/01
Inventor 李凌云叶禹孙晓玮
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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