JP2503453Y2 - Strip line type microwave circuit element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a strip line type microwave circuit element such as a circulator or an isolator.

<Prior art> Non-reciprocal circuit elements such as circulators and isolators used in recent microwave integrated circuits mainly consist of a strip line of a predetermined pattern formed on an element substrate such as ferrite, and combine it with a magnet. ing. Then, there are a case where it is mounted on the integrated circuit as it is, and a case where it is mounted on the integrated circuit as an element with a carrier in which the element substrate is attached to a metal carrier. In any case, the element is attached to the substrate side of the integrated circuit, and the terminal portion of the strip line is connected to another circuit. A metal ribbon is generally used for the connection.

Therefore, in the conventional circulators and isolators, regardless of whether or not the carrier is provided, those in which a metal ribbon is attached in advance to the terminal portion of the strip line are commercialized in order to simplify the connection work of other circuits. . Gold and copper are typical materials for the metal ribbon. Gold ribbons are provided for thermocompression bonding and copper ribbons are provided for soldering. When the substrate of the microwave integrated circuit is an alumina substrate, thermocompression bonding with a gold ribbon is suitable. In addition, in an integrated circuit using a Teflon glass substrate, soldering with a copper ribbon is suitable.

<Problems to be solved by the invention> Conventional microwave circuit elements with a metal ribbon are provided with a gold ribbon for mounting on an alumina substrate and with a copper ribbon for a Teflon glass circuit substrate. Has been done. The user selects and purchases one with a gold ribbon or one with a copper ribbon according to the type of circuit board to be used.

However, in recent microwave integrated circuits, circuit boards of different materials are often used for each module.For example, the circuit connected to the input side of the isolator is mounted on the alumina substrate, and the circuit connected to the output side is mounted on the Teflon glass substrate. It may be implemented. In the conventional device with a metal ribbon, the metal ribbon of the same material is attached to multiple terminals, so in the above case, the isolator with gold ribbon cannot be used, and the isolator with copper ribbon can also be used. Can not. Therefore, in this case, purchase an isolator without a metal ribbon, use a separately prepared gold ribbon for the input side to output the terminal board by thermocompression bonding, and use a copper ribbon on the output side for the device and circuit. Must be connected by soldering, and the mounting work becomes very complicated.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a strip line type microwave circuit element suitable for connection and mounting between circuit boards having different bonding methods.

<< Means for Solving the Problems >> Therefore, in the strip line type microwave circuit element of the present invention, a plurality of terminal portions of the strip line made of the same metal and having a predetermined pattern on the element substrate are connected to other circuits. As a lead, a gold ribbon is attached to a certain terminal portion, and a metal ribbon other than gold is attached to the other terminal portion.

<< Operation >> The gold ribbon is suitable for thermocompression bonding, and the metal ribbon side of a material other than gold is suitable for soldering.

<< Embodiment >> FIG. 1 shows an isolator according to an embodiment of the present invention. The ferrite substrate 1 is a main body of an isolator, and on its upper surface side, three strip conductors 2a, 2b, 2c forming a Y-junction circulator and a circular conductor 3 located at the center thereof are formed. 2a, 2b, 2
c and 3 are all made of the same metal, and a ground electrode (not shown) is entirely formed on the lower surface side, and the ground electrode side is bonded to the metal carrier 4 so that the ferrite substrate 1 is fixed on the metal carrier 4. Has been done. Further, a disk-shaped magnet 5 is bonded onto the circular conductor 3 of the ferrite substrate 1 via an insulator (not shown). Further, a non-reflecting terminator (chip resistor or the like) 6 is attached to the terminal portion of the strip conductor 2c.

In the isolator configured as described above, the tip end of the strip conductor 2a is an input terminal, and one end of the gold ribbon 7 is attached to this as a lead for contacting another circuit. The tip of the strip conductor 2b is an output terminal, and one end of the copper ribbon 8 is attached to this. This embodiment is a product suitable when the circuit on the input side is an alumina substrate and the circuit on the output side is a Teflon glass substrate. The gold ribbon 7 on the input side is suitable for thermocompression bonding to an alumina substrate, and the copper ribbon 8 on the output side is suitable for soldering to a Teflon glass substrate.
The copper ribbon 8 on the output side in this example can be replaced with a metal other than gold or copper, and the ribbon may be subjected to a surface treatment such as plating.

If a product with a copper ribbon attached to the input terminal and a gold ribbon attached to the output terminal is also prepared, the selection range expands according to the user's application.

<Effect of Device> As described in detail above, in the strip line type microwave circuit element according to the present invention, the gold ribbon and the metal ribbon other than gold are mixed as the lead for connecting to another circuit. Even when the circuit element is mounted between the alumina circuit board suitable for thermocompression bonding and the Teflon glass circuit board suitable for soldering, it is possible to provide the user with the convenience of mounting the element with the metal ribbon. .

[Brief description of drawings]

FIG. 1 is a perspective view of an isolator according to an embodiment of the present invention. 1 ... Ferrite substrate 2a, 2b, 2c ... Strip conductor 3 ... Circular conductor 4 ... Metal carrier 5 ... Magnet 6 ... Non-reflective terminator 7 ... Gold ribbon 8 ... Copper ribbon

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Ikeda 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Denki Kagaku Co. (72) Creator Hitoshi Tomita 5-36-11 Shinbashi, Minato-ku, Tokyo FUJI DENKI CHEMICAL CO., LTD. 46, No. 11, 1972, PP. 1232-1238

Claims (1)

(57) [Scope of utility model registration request] 1. A microwave circuit element in which a strip line made of the same metal and having a predetermined pattern is formed on an element substrate, the lead being for connecting a plurality of terminal portions of the strip line to another circuit. A strip line type microwave circuit element, wherein a gold ribbon is attached to a certain terminal portion, and a metal ribbon other than gold is attached to another terminal portion.