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Choke assembly substrate

A choke coil, substrate technology, applied in the direction of transformer/inductor coil/winding/connection, preventing/reducing unwanted electrical/magnetic influence, electrical component structure association, etc., can solve the problem of insufficient response, circuit frequency characteristics deterioration, etc.

Active Publication Date: 2018-09-25
ANRITSU CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in recent years, there has been an increasing demand for miniaturization of high-frequency circuits used in optical communication systems, and there has been a problem that circuits using conventional choke coils placed in a horizontal position cannot adequately meet this demand.
[0006] and, if Figure 9 As shown, the conventional choke coil placed in a horizontal position also has a problem that parasitic capacitance occurs between the ground plane of the circuit board and the resonance caused by the parasitic capacitance, which deteriorates the frequency characteristics of the entire circuit including the choke coil.

Method used

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  • Choke assembly substrate
  • Choke assembly substrate
  • Choke assembly substrate

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Embodiment Construction

[0027] Hereinafter, embodiments of the choke coil mounting substrate according to the present invention will be described with reference to the drawings. In addition, the dimensional ratios of the respective structures in the respective drawings do not necessarily match the actual dimensional ratios.

[0028] Such as figure 1 As shown, the choke coil 10 mounted on the choke coil mounting substrate according to the present embodiment is, for example, a well-known laminated coil, and can be used as a coil for a bias T circuit. The length of the choke coil 10 in the longitudinal direction is 1 mm or less, and the ratio of the lengths in the longitudinal direction to the short direction and the ratio of the lengths in the longitudinal direction to the height direction are both about 2:1.

[0029] The choke coil 10 has a rectangular parallelepiped main body 11 , and first external electrodes 12 and second external electrodes 13 provided so as to cover both ends of the main body 1...

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Abstract

The present invention provides a choke assembly substrate capable of high-frequency assembly of a plurality of components including chokes on a circuit substrate and capable of suppressing deterioration of high-frequency characteristics caused by parasitic capacitance. A choke assembly substrate (1) comprises a choke (10) and a circuit substrate (30) equipped with a choke (10); the choke (10) has:a body portion (11) embedded in a conductor portion having a coil shape; and external electrodes (12, 13) that are provided so as to cover both end portions of the body portion (11) in the longitudinal direction, and are electrically connected to both ends of the conductor portion; and the external electrode (12) is electrically connected to the circuit substrate (30) in a state where the longitudinal direction is perpendicular to the circuit substrate (30).

Description

technical field [0001] The invention relates to a choke coil assembly substrate, in particular to a choke coil assembly substrate equipped with a bias T choke coil. Background technique [0002] In recent years, the high-speed and high-capacitance of optical communication have accelerated, and the introduction of 100Gbit / s optical communication systems has been active. In addition, it is also vigorously carrying out research and development for the practical application of the next-generation 400Gbps optical communication system. In optical transceivers and high-frequency circuits for measuring instruments used in these optical communication systems, choke coils such as laminated coils are often used as bias T (for example, refer to Patent Document 1). The choke coil has the characteristic of passing direct current and exhibiting high impedance to high frequency alternating current (high frequency). [0003] Such as Figure 8 As shown, the choke coil 40 is mounted on a cir...

Claims

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Application Information

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IPC IPC(8): H01F27/28H01F27/29H01F27/34H01F27/40H05K1/18
CPCH01F27/2804H01F27/2828H01F27/29H01F27/292H01F27/343H01F27/40H05K1/181
Inventor 神园隆司
Owner ANRITSU CORP