Correction Method for Parasitic Coupling of Surface Mount Microwave Components
A parasitic coupling, microwave device technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of changing the phase velocity of the odd-even mode of the coupled line, the directivity of the coupler, and the uncontrollable frequency response. The odd-even mode phase velocity is stable, the implementation is simple, and the calculation speed is fast.
Active Publication Date: 2015-12-09
成都泰格微电子研究所有限责任公司
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Problems solved by technology
[0005] (1) Due to uneven filling, parasitic coupling will change the odd and even mode phase velocity of the coupled line, and the directivity of the coupler will drop sharply;
[0006] (2) The coupling degree changes, and the frequency response becomes uncontrollable;
[0007] (3) Standing wave variation
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[0032] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0033] A correction method for parasitic coupling of a surface mount microwave device, comprising the following steps:
[0034] (1) Adjust the width of the coupled transmission line and increase the inductance of the transmission line to improve the standing wave;
[0035] (2) Adjust the capacitance of the uncoupled transmission line to improve the directivity of the coupler;
[0036] (3) Adjust the coupling degree of the coupler, which includes the following two methods:
[0037] A: Adjust the dielectric constant and thickness of the coupler;
[0038] B: Change the width of the coupling window.
[0039] Ignoring the effects of non-adjacent coupled lines, such as figure 2 The capacitor array of parasitic coupling is shown. To solve the...
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The invention discloses a surface mounting microwave device intercoupling revising method which includes the following steps: (1) adjusting the width of a coupling transmission line, and increasing inductance of the transmission line so as to improve standing wave; (2) adjusting capacitance of a transmission line free of coupling, and improving the directivity of a coupler; and (3) adjusting a coupling degree of the coupler through two methods of adjusting dielectric constant and the thickness of the coupler and adjusting the width of a coupling window. By means of a finite element method, an intercoupling capacitance array is calculated, a problem that a traditional intercoupling array can not be calculated precisely is solved, a calculating method is simple to implement, calculating speed, efficiency and precision are high, and reliability is good. Phase velocity of an odd-even mold of a coupling line and the directivity of the coupler are stable. A coupling degree is stable, and controllability of frequency response is good. By adjusting the width of the coupling transmission line, the inductance of the transmission line and standing wave ratio are increased.
Description
technical field [0001] The invention relates to a parasitic coupling correction method of a surface mounted microwave device. Background technique [0002] Miniaturized surface mount microwave passive circuit products mainly include power splitters, couplers, 90-degree bridges, etc., which meet the needs of wireless communication, navigation, radar and other electronic equipment, and have broad market prospects. [0003] Due to the miniaturization design requirements of microwave passive devices, the size of coupling devices is limited. The first way to reduce the size is to bend the coupling transmission line. Since the coupling of the bridge is very strong, the transmission line is relatively thin, the distance between the transmission lines is large, and the distance between the upper and lower transmission lines is small. The electromagnetic field is mainly concentrated between the transmission lines to form coupling. When the degree of coupling gradually decreases, the...
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IPC IPC(8): G06F17/50
Inventor 张波陈昌伍
Owner 成都泰格微电子研究所有限责任公司