JPS6139701A - Hybrid integrated circuit device - Google Patents

Abstract

PURPOSE:To improve the deterioration in isolation between terminals of a transmitter and a receiver and to reduce insertion loss by cutting off a part of a main line of a strip line, arranging an electrode equipotential to a sub line between the cut and opposed main lines on the main line axis, connecting a semiconductor active element placed on the electrode to both ends of the main line with a metallic fine wire. CONSTITUTION:A part of the main line 9 of the strip line is cut off, and the electrode equipotential to the sub line 14 is arranged between the cut and opposed main lines 9, 9 on the same plane as the main lines 9, 9 so as not to be in contact with the main lines 9, 9. Since an active element 13 is arranged in the main lines 9, 9, bonding lines 11, 12 connecting the main lines 9, 9 and a diode are made very short, the inductance is decreased and the cut main lines 9, 9 are isolated, then the impedance of the active element 13 is effected directly on the main lines. As a result, the degree of short-circuit is improved, the isolation between the transmitter terminal 6 and the receiver terminal 8 and the insertion loss between the transmitter terminal 6 and an antenna terminal 7 are improved and the insertion loss between the antenna terminal 7 and the receiver terminal 8 is improved.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a hybrid integrated circuit device, and more particularly to a hybrid integrated circuit device that achieves a high switching effect with a diode switch circuit used for switching a strip line of a high frequency circuit to a VH nine line. Regarding circuits. .

2. Description of the Related Art Hitherto, high frequency transmission lines have been switched either mechanically using relays or electrically using changes in the resistance of semiconductor elements such as diodes.

This switching device is required to have good conductivity and be insulated (in an open state), but when using relays, the impedance of the switching section affects the high frequency range, so No need.

Measures are taken to cancel out the empty space dance to prevent the switching effect from worsening.

Recently, switch circuits using semiconductor elements such as PIN diodes, which have a long life and have good switching effects in the high frequency range, have become mainstream, replacing switching devices such as relays that have moving parts and have a short service life. There is one. ” Figure 1 shows this diode switch circuit.

The operation of the circuit and the conventional device will be explained in detail.
.

In the circuit shown in FIG. 1, the transmitter terminal 6 and the receiver terminal 8 are switched to the antenna terminal 1 by applying a bias voltage to the pi-as terminal 5. .

First, the terminal SKFM direction current is 1.2
When a DC bias voltage is applied so that the current flows through the diode 1, the resistance of the series diode 1 and the parallel diode 2 becomes low, and the point IIA becomes C4-F. Here, since point A is located at a distance of λ/4 of the wavelength of the frequency used on the line 9 from point B, impedance z#i at point B and line characteristic formula Z=Z
・tan/11yo), the maximum. Therefore, the signal input from the transmitter terminal 6 is output to the antenna terminal 7.

Next, when no bias voltage is applied, ie.

At 0 bias, series diode 1 and parallel diode 2
remains at a high resistance, and the signal input from terminal 7 is output to terminal 8.

In this manner, the antenna terminal 7 can be switched to the transmitter terminal 6 and the receiver terminal 8.

In the following, drawbacks of conventional devices in switch circuits based on these various principles will be described.

FIGS. 2 and 3 are enlarged views of the diode installation shown in FIG. The mounting method of conventional device 102 is shown in an enlarged view. In the high frequency range, in the case of the conventional device 101, the impedance increases due to the inductance of the bonding wire 10, and the degree of short circuit at point A becomes worse. The drawback was that the power transfer ratio, that is, the isolation, was low.

On the other hand, in the case of the conventional device 102, the bonding wire 11
The inductance becomes part of the transmission line and the conventional device 10
1, the inductance improves the short circuit at point A, but since the distance between the opposing main lines is short, coupling of electromagnetic lines of force occurs, and the influence of the active element 13 (diode) There is a drawback that the transmitter terminal 6 and the receiver terminal 8 are not isolated directly from each other, resulting in poor isolation between the transmitter terminal 6 and the receiver terminal 8.

Furthermore, in the case of the conventional device 102, when the distance between the main lines is increased in order to reduce the coupling between the main lines, bonding I! Because the length of 11 becomes longer, Kon i!
This results in an increase in insertion loss between the antenna terminal 7 and the receiver terminal 8, resulting in a problem that the switching effect deteriorates.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional circumstances.
Therefore, an object of the present invention is to improve the deterioration of the isolation between the transmitter terminal 6 and the receiver/terminal 8, which is a drawback of the conventional device, and furthermore,
It is an object of the present invention to provide a novel hybrid integrated circuit device in which the connection loss between the receiver terminal 8 and the antenna terminal 7, that is, the iser vvin loss is reduced. 'Structure of the Invention In order to achieve the above object, the hybrid integrated circuit device according to the present invention includes a main line of a strip line in which a part of the main line is cut off, and a line between the main line facing the cut line and the same as the sub line. A potential electrode is placed on the main line axis.

A medium conductive active element placed on the electrode is connected to both ends of the main line by a thin metal wire.

EXAMPLE OF THE INVENTION Next, a preferred practical example of the present invention will be specifically explained with reference to the drawings.

FIG. 4 is a schematic diagram showing an embodiment of the present invention. In FIG. 4, a part of the main line 9 of the strip line is cut, and a sub line (
Ia ground electrode) 14 is connected to the main line 9.9 so that the electrode having the same potential as the main line 9.9 does not come into contact with the main line 9.9. '9 is placed on the same plane. A semiconductor active element 13 is placed on the electrode, and the active element 13 is connected to both ends of the main lines 9, 9 by bonding lines (thin metal wires) ILn.

Functions and Effects of the Invention ゛By treating the bonding wires 11 and 12 as part of the transmission line in the device according to the present invention, the conventional device 101 described above can be improved.
The device according to the present invention is similar to the conventional device 102 in that the drawbacks of the conventional device 102 are improved, but the device according to the present invention further improves the drawbacks of the conventional device 102. That is, in the case of the device according to the present invention, since the active element (semiconductor element) 13 is arranged in the main line 9, 9, the bonding line 11 connecting the main line 9, 9 and the diode, 12 can be made very short.

Since the inductance can be reduced and the disconnected main lines 9 are insulated, the impedance of the active element 13 directly affects the main line.

As a result, the degree of short circuit is high], and the transmitter terminal 6 and receiver terminal 8
Isolation between zero and insertion loss between the transmitter terminal 6 and antenna terminal 7 are improved, and insertion loss between the antenna terminal 7 and receiver terminal 8 is also improved. According to experiments conducted by the present inventor, it has been found that the device according to the present invention can improve shear isolation by 10 times and Ff4 inner region loss by 20%.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a diode switch circuit, and FIGS. 2 and 3 are respectively a conventional circuit 101. FIG. 4 is an enlarged view of the diode mounting portion of the conventional circuit 102, showing an example of the present invention, and is an enlarged view of the diode mounting portion according to the present invention. l...Series diode, 2...Parallel diode, 3
...DC cut capacitor, 4...Choke coil N
%5... Bias terminal %6... Transmitter terminal, 7...
・Antenna terminal, 8...Receiver terminal, 9...Main line, 1G...Parallel bonding line, 11...Series・
Bonding wire, 12...Series bonding wire, 13
...Active element (pellet).

Claims (1)

[Claims] A part of the main line of the strip line is cut off, and between the cut and opposing main lines, an electrode having the same potential as the sub line is placed on the same plane as the main line so as not to come into contact with the main line, A hybrid integrated circuit device characterized in that a semiconductor active element placed on the electrode is connected to both ends of the main line by a thin metal wire.