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: 2022-07-19
杭州泛利科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 are described below with reference to the drawings. The preferred embodiments described here are only used to illustrate and explain the present invention, and are not used To limit the present invention, all modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

[0031] like figure 2 As shown, an IPD-based miniaturized low-insertion-loss broadband balun includes a substrate; a reference ground plane, located on the back side of the substrate; a coupling line, located on the front side of the substrate; Output port for outputting balanced signals with equal amplitude and 180° phase difference; figure 1 for figure 2 Schematic diagram of the equivalent ...

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Abstract

The invention discloses a miniaturized low insertion loss broadband balun based on IPD. The unbalanced signal is fed into the first microstrip coupling line through the input port P1, and the radio frequency signal is respectively coupled to the second microstrip coupling line and the third microstrip coupling line through the first microstrip coupling line; since the signal goes from the input to the output port P2 It transmits half a wavelength more than the output port P3, and their output signals have the same amplitude and opposite phase. Therefore, the phase difference of 180° is realized between the output ports, and the unbalanced signal is converted into a balanced signal. On the basis of the traditional Marchand balun, the three-wire coupling of the invention adopts the structure of helical cross-coupling to strengthen the coupling and improve the working bandwidth of the balun. On the other hand, the miniaturization of the microstrip balun is achieved through the IPD process design, and low insertion loss and good balance of the output signal 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, coaxial baluns, etc. Among them, the design of microstrip balun is flexible and easy to integrate with microwave circuits, and has been widely studied. The most typical microstrip balun is the Marchand balun, which uses coupled lines in various forms. At present, microstrip Marchand baluns generally have the following problems: First, with the further miniaturization of circuit design, the requirements for the miniaturization of baluns are getting higher and higher. Marchand baluns are a kind of microstrip baluns, and they have large dimensions. Secondly...

Claims

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Application Information

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Patent Type & Authority Patents(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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