Symmetrical Lange bridge with non-staggered bridge arms

A symmetrical bridge arm technology, applied in the field of microwave and millimeter wave circuits and systems, can solve problems such as the degradation of harmonic and image suppression performance, the deterioration of phase accuracy and error, and the dislocation of bridge arms, so as to improve impedance balance and improve Balance characteristics, the effect of ensuring balance

Inactive Publication Date: 2012-07-25
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unbalanced port signal feed-in structure of the traditional Lange bridge, the bridge arm is dislocated due to the cross-type bridge connection, and the absorption load at the isolation end is asymmetrical with the layout of the input end, resulting in an unbalanced port impedance between the through end and the coupling end of the traditional Lange bridge. , the isolation between ports becomes worse, especially in millimeter wave and submillimeter wave applications. The direct performance is that the Lange bridge loses the traditional advantages of high isolation and good standing waves. The indirect performance is that under different application conditions, Decreased synthesis efficiency, worsened phase accuracy and error, worsened harmonic and image rejection performance, etc.

Method used

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  • Symmetrical Lange bridge with non-staggered bridge arms
  • Symmetrical Lange bridge with non-staggered bridge arms
  • Symmetrical Lange bridge with non-staggered bridge arms

Examples

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Embodiment 1

[0017] figure 2 It is a symmetrical Lange bridge design without dislocation of bridge arms using a 4-finger parallel coupled line structure according to an embodiment of the present invention. Among them, the first port balanced feed-in structure 10 and the second port balanced feed-in structure 11 adopt X-type cross bridge connection; the bridge arm connection network 7 also adopts X-type cross bridge connection, and the first port balance feed-in structure 10 is connected to the bridge arm connection network 7 Between the two, the second port balanced feed-in structure 11 and the bridge arm connection network 7 are respectively connected through the symmetrical layout of the first bridge arm coupling structure 20 and the second bridge arm coupling structure 21 to form a Lange bridge The symmetrical distribution of the bridge arm without dislocation improves the balance of the spatial distribution of the Lange bridge magnetic field; the straight-through terminal 5 and the co...

Embodiment 2

[0019] image 3 It is a symmetrical Lange bridge design without dislocation of bridge arms using a 6-finger parallel coupled line structure according to an embodiment of the present invention. Its composition mode and principle are the same as those described in Embodiment 1, Figure 4 , Figure 5 They are the 8-finger parallel coupled line structure and the 4-finger arched folded parallel coupled line structure, and these structures maintain the performance consistent with that described in Example 1.

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Abstract

The invention discloses a symmetrical Lange bridge with non-staggered bridge arms, which comprises a first port balance feed-in structure, a second port balance feed-in structure, a first bridge arm coupling structure, a second bridge arm coupling structure, an input end feed-in network, a balance absorbing load network, a through end, a coupling end and a bridge arm connecting network, wherein the first port balance feed-in structure, the second port balance feed-in structure and the bridge arm connecting network adopt X-shaped cross bridging; the X-shaped cross bridging of the bridge arm connecting network enables bridge arm coupling structures to be in non-staggered connection; and the spatial layout of the first bridge arm coupling structure and the second bridge arm coupling structure, the spatial layout of the input end feed-in network and the balance absorbing load network and the spatial layout of the through end and the coupling end are in full mirror symmetry. The symmetrical Lange bridge with non-staggered bridge arms has the advantages that the impedance unbalance between the coupling end and the through end of the Lange bridge is improved, the level of isolation between the coupling end and the through end of the Lange bridge is improved, the phase unbalance between the coupling end and the through end of the Lange bridge is reduced and the port standing wave characteristic is improved.

Description

technical field [0001] The invention relates to a symmetrical Lange bridge without dislocation of bridge arms, which is widely used in technologies such as microwave and millimeter wave circuits and systems. Background technique [0002] The Lange bridge has a wide range of applications in power synthesis, balanced amplification, phase shifter, vector modulation, quadrature mixing, etc. Ideally, engineers hope to have good phase quadrature characteristics, and balanced port impedances at the through end and the coupling end. Only in this way can we ensure good synthesis efficiency, phase shift accuracy, modulation phase error, image rejection and other characteristics in different applications. However, due to the unbalanced port signal feed-in structure of the traditional Lange bridge, the bridge arm dislocation due to the cross-type bridge connection, and the asymmetry between the absorbing load at the isolation end and the layout of the input end, resulting in an unbalanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/16
Inventor 王维波张斌黄念宁曹敏华
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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