JPS60134601A - Ultrahigh frequency power distributor - Google Patents

Abstract

PURPOSE:To reduce the number of components and to attain low cost by extracting an ultrahigh frequency power applied to the 1st terminal of a circulator from the 2nd terminal, making a reactance component variable to apply the power to a variable attenuation section making the attenuation variable thereby extracting a transmitted power from other terminal and a reflected power from the 3rd terminal externally respectively. CONSTITUTION:When assuming that a magnetic field is applied from the downward direction to the upward direction of this paper, the ultrahigh frequency power applied from an input terminal 4 of a circulator 10 to the 1st terminal 1 of a hybrid circuit 10 is extracted from the 2nd terminal 2 of the hybrid circuit and applied to a pin diode 13. Since the reactance component of the pin diode 13 is changed ideally from infinite value to zero by changing the DC current value from a DC current supply terminal 5, the ultrahigh frequency power applied to an input terminal 4 is extracted from output terminals 6, 7 in the distribution ratio corresponding to the reactance component of the pin diode.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to an ultra-high frequency power divider, and particularly to an ultra-high frequency power divider whose distribution ratio can be electrically controlled in the microwave and millimeter wave bands. It is related to vessels.

佽) Conventional technology and problems ■ FIG. 1 shows a conventional example of an ultra-high frequency power divider.

In the figure, 1 is a hybrid circuit, 2 and 3 are variable attenuation sections, 4 is an input terminal, 6 and 7 are output terminals,
5 and 8 indicate DC current supply terminals.

The operation of an ultra-high frequency power divider composed of such elements is as follows.

The ultra-high frequency power applied to the input terminal 4 is divided into two parts by the hybrid circuit l and applied to the variable attenuation parts 2 and 3, respectively. The variable attenuation parts 2 and 3 are composed of pin diodes, and the actance of the pin diodes changes in response to changes in the value of the DC current supplied from the DC current supply terminals 5 and 8. Therefore, the amount of attenuation changes.

Since this circuit controls variable attenuation sections 2 and 3 separately,
At the output terminals 6 and 7, arbitrarily distributed power can be obtained. However, since two variable attenuation sections and their control circuits are required, the number of components increases, and as a result, a large space is required and the cost also increases.

tel OBJECTS OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and it is an object of the present invention to provide a simple and inexpensive ultra-high frequency power divider in which distribution is determined by one control current.

(d) Structure of the Invention The object of the above invention is to take out the ultra-high frequency power applied to the first terminal of the circulator, which has the first, second and third terminals in the order of rotational direction, from the second terminal and convert it into a reactance component. A means for applying to a variable attenuation section whose attenuation amount is made variable by making it variable; This is achieved by providing an ultra-high frequency power divider characterized by comprising means for taking out each of the above from the third terminal to the outside.

1e) Examples of the invention FIG. 2 shows an embodiment of the invention.

In the figure, 10 is a circulator, 11 and 12 are capacitors, 13 is a pin diode, and 14 is a wire ring.

Note that the same symbols as in FIG. 1 indicate the same parts.

Each of these elements is connected as follows.

The first terminal (11) of the circulator 10 is connected to the input terminal 4, the second terminal (2) is connected to the output terminal 6 via capacitors 11 and 12, and the third terminal (3) is connected to the output terminal 7. Ru.

Further, the DC current supply terminal 5 is grounded via the wire ring 14, the connection point between the capacitors 11 and 12, and the pin diode 13.

The operation of the ultra-high frequency power divider connected in this way is as follows. That is, in FIG. 2, if a magnetic field is applied to the circulator 1o from the bottom to the top of the page, the input terminal 4
The ultra-high frequency power applied to the first terminal [11] of the hybrid circuit 1o is taken out from the second terminal (2) of this hybrid circuit and applied to the pin diode 13.

The reactance of the thin diode 13 changes from a state close to a short circuit to a state close to an open circuit depending on the magnitude of the DC current applied from the DC current supply terminal 5.

Therefore, when the reactance of the pin diode 13 is close to open, no mismatch occurs due to the pin diode, and the ultra-high frequency power applied to the input terminal 4 can be extracted almost directly to the output terminal 6.

On the other hand, when the reactance of the pin diode 13 is short-circuited, all the ultra-high frequency power input to the input terminal 4 is reflected by the pin diode 13, and the reflected power is transferred to the second terminal (2) of the circulator 10. and is taken out from the third terminal (3).

That is, by changing the DC current value from the DC current supply terminal 5, the reactance of the pin diode 13 ideally changes from infinity to 0, so the ultra-high frequency power applied to the input terminal 4 is It can be taken out from output terminals 6 and 7 at a distribution ratio corresponding to the pin diode paste actance.

FIG. 3 is a diagram showing changes in attenuation between the input terminal 4 and the output terminal 6 and between the input terminal 4 and the output terminal 7 with respect to the control current of the pin diode 13.

In the figure, the solid line indicates the case where the loss in the forward direction of the circulator between the terminals 4→6 and the terminals 4-7 is assumed to be 0, and the dotted line indicates the case where the loss is taken into account.

From this figure, for example, when the control current is about 2.5 mA, approximately the same ultra-high frequency power can be taken out from output terminals 6 and 7, but when the control current is about 2.5 mA or less, the output terminal 6 has more power. In this case, there are more output terminals 7, and the distribution ratio is uniquely determined by the control current of the pin diode 13.

In FIG. 4, a pin diode 13 is inserted between the second terminal (2) of the circulator 10 and the capacitor 12, and a fixed attenuator 21 is connected to the third terminal (3) of the circulator 10. be. Note that 2o indicates a wire ring.

Thereby, the distribution ratio between the input terminals 6 and 7 determined by the reactance of the pin diode 13 can be made variable by changing the amount of attenuation of the fixed attenuator 21.

(fl Effects of the Invention As explained above, the variable attenuation section using a pin diode utilizes the change in actance of the pin diode, so when the attenuation amount is changed, a mismatch occurs and the reflected wave occurs.

The present invention utilizes this reflected wave to realize an electronically controlled power divider, and since the electronically controlled power divider is configured with a circulator and one pin diode, the number of parts is small and the price is low. I was able to make it cheaper.

[Brief explanation of drawings]

Fig. 1 shows a conventional example of an ultra-high frequency power divider, Fig. 2 shows an embodiment of the present invention, Fig. 3 is a diagram for explaining the operation of the variable attenuation section, and Fig. 4 shows an example of the present invention. Another example is shown below. In the figure, 1O is a circulator, 11 and 12 are capacitors, 13 is a pin diode, and 21 is a fixed attenuator. Akuta 1 Sashii 2 Prison q 0 °−

Claims (1)

[Claims] The ultra high frequency power applied to the first terminal of the circulator, which has the first, second and third terminals in the order of rotational direction, is applied to the second terminal.
A means for applying it to a variable attenuation section whose attenuation amount is made variable by making the reactance variable by taking it out from a terminal of An ultra-high frequency power divider comprising means for extracting the reflected power from the terminals to the outside from the third terminals.