Nonreciprocal circuit device and telecommunications apparatus including the same

A technology of circuit components and resistors, which is applied in the field of non-reversible circuit components, can solve the problems such as the resin film is easy to fall off, and achieve the effect of preventing the increase of insertion loss and improving the effect of short circuit

Inactive Publication Date: 2005-02-02
ALPS ALPINE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In addition, when a resin film is formed on the lower yoke 208 below the terminal electrode of the working end of the chip resistor R, since the lower yoke 208 is generally subjected to silver plating or solder plating, the plating film formed on this plated film may occur. The problem that the resin film on the top is easy to fall off

Method used

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  • Nonreciprocal circuit device and telecommunications apparatus including the same
  • Nonreciprocal circuit device and telecommunications apparatus including the same
  • Nonreciprocal circuit device and telecommunications apparatus including the same

Examples

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Embodiment 1

[0108] In addition to making the shape of the magnetic substrate hexagonal in plan view, other similar Figure 1 to Figure 4 The same isolator shown with a length of 3.5 mm and a width of 3.5 mm detects the bias magnetic field applied to the magnetic substrate when a signal flows from the first port P1 to the second port P2 (from input to output). distribution status. The result is as Figure 6 shown. Figure 6 Also shown is the arrangement relationship between the magnetic substrate 5' and the lower yoke 3 used here.

[0109] The used center frequency of the isolator produced here is set to 1.88GHz.

[0110] The magnetic substrate 5' used here has a length of about 1.5 mm, a width of about 1.8 mm, and a thickness of about 0.35 mm, such as Figure 6 Shown in top view hexagonal shape and constructed of yttrium iron garnet ferrite (YIG). In addition, the size of the notch 3d formed at the lower yoke 3 below the working end of the terminal chip resistor 13 arranged verticall...

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Abstract

Provided is a non-reversible circuit element capable of preventing an increase in insertion loss as a non-reversible circuit element and miniaturizing the element as a whole, by applying a stable bias magnetic field to a magnetic substance. A nonreciprocal circuit device includes a box-like yoke consisting of upper and lower yokes. The yoke accommodates a magnetic assembly consisting of a magnetic body and first to third line conductors, chip capacitors connected to ends of the line conductors, and a magnet. The first and second line conductors are input and output terminals, and an end of the third line conductor is connected to a terminating chip resistor. The chip resistor is longitudinally disposed such that its long sides are substantially perpendicular to a line between ends of the input and output terminals. The end of the third line conductor is connected to a terminal electrode on the hot side of the terminating chip resistor. A terminal electrode on the earth side of the terminating chip resistor is directly connected to the lower yoke, and a notch is formed in the lower yoke under the hot side terminal electrode.

Description

[0001] technology area [0002] The present invention relates to nonreciprocal circuit elements such as isolators used in communication devices such as mobile phones. Background technique [0003] Figure 8 It is an exploded perspective view showing the structure of a conventional general isolator (non-reciprocal circuit element). [0004] Figure 8 In the shown isolator 200, a disc-shaped permanent magnet 203, a magnetic assembly 205, and three matching chip capacitors C1 are sandwiched between a box-shaped upper yoke (上ヨ一ク) 202 and a lower yoke 208. , C2, C3 and a resin box 207 with a terminal chip resistor R. (Refer to Patent Documents 1 and 2) [0005] The structure adopted by the magnetic assembly 205 is that a ferrite 254 is placed at the connecting portion of the central conductor having the same shape as the bottom surface of the disk-shaped ferrite 254, and the three central conductors 251 extended from the connecting portion, 252 and 253 are bent and wound at pred...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/36
CPCH01P1/36
Inventor 驹井荣一大西人司
Owner ALPS ALPINE CO LTD
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