Miniaturized low-insertion-loss broadband balun based on IPD

A broadband and microstrip technology, applied in waveguide devices, circuits, connecting devices, etc., can solve the problems of insufficient frequency band, large size, and inability to meet broadband application scenarios, and achieve the effect of strengthening coupling and improving working bandwidth

Active Publication Date: 2021-12-07
杭州泛利科技有限公司
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Problems solved by technology

At present, the microstrip Marchand balun generally has the following problems: First, as the circuit design further tends to be miniaturized, the requirements for the miniaturization of the balun are getting higher and higher. secondly, the frequency band designed by the traditional Marchand balun is not wide enough to meet some broadband application scenarios

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  • Miniaturized low-insertion-loss broadband balun based on IPD
  • Miniaturized low-insertion-loss broadband balun based on IPD
  • Miniaturized low-insertion-loss broadband balun based on IPD

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Embodiment Construction

[0030] In order to more clearly illustrate the problems solved by the present invention, the technical solutions adopted and the beneficial effects, the specific embodiments of the present invention will be described below in conjunction with the illustrations. The preferred implementation examples described here are only used to illustrate and explain the present invention, and are not intended to To limit the present invention, all modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

[0031] Such as figure 2 As shown, a miniaturized low insertion loss broadband balun based on IPD includes a substrate; a reference ground plane, located on the back of the substrate; a coupling line, located on the front of the substrate; accepting unbalanced signal single-ended input, a pair of An output port that outputs balanced signals with equal amplitude and...

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Abstract

The invention discloses a miniaturized low-insertion-loss broadband balun based on an IPD. An unbalanced signal is fed into the first microstrip coupling line through the input port P1, and a radio frequency signal is coupled to the second microstrip coupling line and the third microstrip coupling line through the first microstrip coupling line. As the signals are transmitted by half wavelength more than the output port P3 from the input to the output port P2, the output signals of the signals are equal in amplitude and opposite in phase. Therefore, a 180-degree phase difference is realized between the output ports, and an unbalanced signal is converted into a balanced signal. According to the invention, on the basis of a traditional Marchand balun, coupling is enhanced by adopting a spiral cross coupling structure, and the working bandwidth of the balun is improved. On the other hand, the micro-strip balun is miniaturized through the IPD process design, and low insertion loss and good balance of output signals are achieved through optimization.

Description

technical field [0001] The invention belongs to the technical field of microwave integrated passive devices, and is an IPD-based miniaturized low insertion loss broadband balun. Background technique [0002] A balun is a microwave device that converts an unbalanced signal into a balanced signal. It is widely used in radio frequency microwave circuits, and there are many types, such as transformer baluns, microstrip baluns, and coaxial baluns. Among them, the microstrip balun is flexible in design and easy to integrate with microwave circuits, and has been extensively studied. The most typical microstrip balun is the Marchand balun, which uses coupled lines in various forms. At present, the microstrip Marchand balun generally has the following problems: First, as the circuit design further tends to be miniaturized, the requirements for the miniaturization of the balun are getting higher and higher. secondly, the frequency band designed by the traditional Marchand balun is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/10
CPCH01P5/10
Inventor 王高峰任启翔曹芽子
Owner 杭州泛利科技有限公司
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