JPS6318163Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a stripline filter.

Conventionally, a stripline filter is placed flat on a metal case 1, as shown in FIG. It is used either by grounding the circuit board (not shown) or by laying it flat on a circuit board 3 and gluing the ground electrode as shown in FIG.
However, in these cases, the metal case 2 increases the space occupied by the stripline filter 2, or the stripline filter 2 covers a large area of the circuit board 3, resulting in an increase in circuit density. It has the disadvantage that it is low.

To deal with this, for example, as shown in Japanese Utility Model Application Publication No. 56-96705, pin terminals are connected to each electrode, and these pin terminals are connected from one side edge of the dielectric substrate in the direction of the board surface. Stripline filters projecting parallel to each other along the line have been proposed.
The stripline filter having this configuration can be assembled in an upright position on a circuit board or the like using pin terminals, and as a result, the circuit density can be increased.

However, when multiple pin terminals are extended from the side edge of the dielectric substrate as described above, the isolation between the input and output pin terminals may be insufficient depending on the mutual positional relationship of the pin terminals. Therefore, there is a possibility that the required filter characteristics cannot be obtained.

In view of the above-mentioned problems, the present invention increases circuit density by allowing the stripline filter to be assembled in an upright position on a circuit board, etc., and ensures isolation between input and output parts. The purpose is to obtain the expected filter characteristics.

In order to achieve this objective, the present invention extends a pair of input/output external extraction electrodes from both sides of one side edge of the dielectric substrate, and extends the dielectric from both sides of the one side edge. Input/output pin terminals protruding parallel to each other in the board surface direction are electrically connected to both external extraction electrodes, and the ground electrode has at least one input/output pin terminal protruding parallel to each other between the input/output pin terminals. A stripline filter was constructed by connecting the ground pin terminal of a book.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments and drawings.

FIG. 3 is a perspective view of the electronic circuit. This electronic circuit 4 includes a resistor R1 on one main surface of a circuit board 5.
R2, capacitor C1, transistors Tr ₁ , Tr ₂ ,
A strip line filter 2' etc. are assembled. The stripline filter 2' is not laid flat on the circuit board 5, but is assembled in an upright state so that its plate surface direction intersects with the circuit board 5.

FIG. 4 is a partially cutaway perspective view of the stripline filter 2', and FIG. 5 is a longitudinal sectional view thereof. This stripline filter 2' has two resonant electrodes 11 and 12 which are vertically long in the figure and are provided in parallel on one main surface of a dielectric substrate 10.
A ground electrode (not shown) facing the resonance electrode and having the same shape is formed on the other main surface. code 1
Reference numeral 3 denotes a guard electrode, which is electrically connected to a ground electrode via a conductive portion (not shown) formed on the lower side surface in the figure. The resonant electrode 1
1 and 12 are connected at one end to the guard electrode 13 and have respective external extraction electrodes 14 and 15 extending from them to one side edge of the dielectric substrate 10.

Five pin terminals 16 to 20 projecting downward are provided on the lower side edge of the dielectric substrate 10 in the drawing.
Assemble. Of these pin terminals 16 to 20, those at both ends are electrically connected to the external lead electrodes 14 and 15 by soldering, and the three in the middle are electrically connected to the ground electrode and the guard electrode 13 in the same way. do.

Reference numeral 21 denotes an insulating member which is coated with a dip as an exterior material if necessary, and is made of, for example, phenol resin or epoxy resin.

The stripline filter 2' constructed in this manner can be supported with the pin terminals 16 to 20 protruding from the circuit board 5 in an upright direction, and the area occupied on the circuit board can be reduced.

FIG. 6 is a longitudinal sectional view of another embodiment of the present invention corresponding to FIG. 5, and this stripline filter 2'' is different from the stripline filter 2' shown in FIGS. 4 and 5. Metal shield case 22
The difference is that is added, and the other configurations are the same. Therefore, in FIG. 6, FIG.
Components corresponding to those in FIG. 5 are given the same reference numerals.

The stripline filter 2'' constructed in this manner is also assembled vertically on the circuit board 5.

In addition, when providing the shield case 22,
The insulating member 21 may be omitted.

As explained above, since the present invention has pin terminals extending from the dielectric substrate in the direction of the board surface, the stripline filter can be assembled to the circuit board in an upright state. As a result, the area occupied by the stripline filter on the circuit board can be reduced.
It is possible to achieve effects such as increasing the circuit density on the circuit board and making the circuit board smaller.

Moreover, in the present invention, since the grounding pin terminal is interposed between the pair of input/output pin terminals protruding in parallel, this grounding pin terminal exerts a shielding effect on the input/output pin terminals, Isolation between input and output pin terminals is ensured. Therefore, no unnecessary interaction occurs between the input and output sections, and the desired filter characteristics can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a conventional example, Fig. 2 is a perspective view of another conventional example, and Fig. 3 is a partially cutaway perspective view of the stripline filter. 4 is a partially cutaway perspective view of the stripline filter, FIG. 5 is a vertical cross-sectional view of the stripline filter, and FIG. 6 is a vertical cross-sectional view of another embodiment of the present invention. 10... Dielectric substrate, 14, 15... External extraction electrode, 16-19... Pin terminal.

Claims (1)

[Scope of utility model registration request] A pair of external lead-out electrodes for input/output are extended from both sides of one side edge of the dielectric substrate, and input and output electrodes protrude parallel to each other from both sides of the one side edge in the direction of the plate surface of the dielectric substrate. An output pin terminal is electrically connected to both external lead-out electrodes, and the ground electrode is connected to at least one earth pin terminal protruding in parallel between the input/output pin terminals. Lipline filter.