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Non-reciprocal circuit element

A technology of circuit components and inductance components, applied in the field of non-reversible circuit components, can solve problems such as cracks, lower product yields, and cracks in laminated substrates

Active Publication Date: 2007-07-04
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adjustment of the capacitance values ​​of the first and second capacitive elements C1 and C2 by trimming may cause cracks and cracks in the laminated substrate, resulting in a significant decrease in product yield.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0077] The capacitance values ​​of the capacitors Cii and Cfi formed in the laminated substrate are set to be 27.6pF and 17.1pF respectively, which are about 5% smaller than the set values ​​of the first and second capacitive elements Ci and Cf, and 1500 (50× 30) multiple mother substrates for stacking substrates. The distribution of the capacitance values ​​of the capacitors Cfi in 1500 laminated substrates arbitrarily selected from the laminated substrates obtained by dividing these mother substrates is shown in FIG. 13 . The capacitance value of the capacitor Cfi is in the range of 16.6 to 17.8 pF, which is the same as that of the conventional example 1.

[0078]The capacitance value of the capacitor Cfi was measured for each of these laminated substrates, and when the measured value was 16.6 pF or more and less than 17.0 pF, a chip capacitor with a capacitance of 1.2 pF was mounted on the surface of the laminated substrate as a correction chip capacitor Cfe. Similarly, wh...

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PUM

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Abstract

A non-reciprocal circuit element comprising a first inductance element connected between a first input / output port and a second input / output port; a second inductance element connected between the second input / output port and a grounded point; a first capacitance element connected between the first input / output port and the second input / output port for constituting a parallel resonant circuit along with the first inductance element; a second capacitance element connected between the second input / output port and a grounded point for constituting a parallel resonant circuit along with the second inductance element; and a resistance element connected between the first input / output port and the second input / output port; wherein the first capacitance element and / or the second capacitance element comprises a parallel connection of a capacitor, which is formed by an electrode pattern in a layer-built board comprising a dielectric and the electrode pattern, and a chip capacitor mounted on the layer-built board.

Description

technical field [0001] The present invention relates to a non-reciprocal circuit element having non-reciprocal transmission characteristics for high-frequency signals, and more particularly to a non-reciprocal circuit element generally called an isolator used in mobile communication systems such as mobile phones. Background technique [0002] Nonreciprocal circuit elements such as isolators are widely used in mobile communication equipment using a frequency band of several hundreds of MHz to several tens of GHz, that is, base stations of PHS (Personal Handyphones), mobile phone terminals, and the like. For example, in a transmission section of a mobile communication device, an isolator is disposed between a power amplifier and an antenna to prevent backflow of unnecessary signals to the power amplifier and to stabilize the load-side impedance of the power amplifier. Therefore, isolators are required to be excellent in insertion loss characteristics, reflection loss character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/36H01G4/255H01G13/00H01P1/365H01G4/12
CPCH01P1/387H01G4/40H01G4/232H01P1/36H01G4/255H01P1/365
Inventor 岸本靖寺胁武文野津稔
Owner PROTERIAL LTD
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