JPS60192408A - Klystron power amplifier device - Google Patents

Abstract

PURPOSE:To eliminate the need for readjustment attended with the change in the operating frequency by storing a phase shift amount of a signal given to each Klystron (and attenuation) and an adjusting value of a cavity resonator of each Klystron as to plural operating frequencies. CONSTITUTION:The compensating value of the phase shift and attenuation obtained in advance through adjustment in plural operating frequencies is stored respectively to a phase shift storage circuit 9 and an attenuation storage circuit 12. Further, the tuning position of the cavity resonator of the Klystrons 4, 6 obtained through the adjustment at plural operating frequencies is stored to cavity resonator setting value storage circuits 13 and 15. In changing the operating frequency, a frequency selection circuit 17 controls for the phase shift storage circuit 9, the attenuation storage circuit 11 and the cavity resonator setting value storage circuits 13, 15 at which frequency the phase shift, attenuation and tuning position require the compensation at the same time. That is, the phase shift, attenuation and setting of the Klystron cavity resonator required for efficient power combination are conducted automatically by the operation of the frequency selection circuit 17 only.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to Which the Invention Pertains] The present invention relates to a combination-type clinetron power amplification device.

[Description of prior art]

In satellite communications, satellite tracking and control, etc., a synthesis method using multiple klystrons is used to obtain high-power, high-frequency signals. In order to obtain the required output power and frequency amplitude characteristics, multiple high-frequency signals amplified by multiple klystrons must be combined.
This requires adjusting three things: a phase shifter, an attenuator, and a klystron cavity resonator. Therefore, when changing the operating frequency of the klystron power amplifier, it is necessary to perform these five adjustments each time.

In conventional synthesis type klystron amplifiers, in order to adjust the three components of the phase shifter, attenuator, and Klystron cavity resonator, there is no function to store the adjustment results, so the operating frequency must be changed once. This has the drawback that, even if the device is to be operated again at the same operating frequency as before, readjustment is required.

Furthermore, since these three adjustments are independent, it is troublesome to readjust them every time the operating frequency is changed.

[Purpose of the invention]

The amount of phase shift (and amount of attenuation) of the signal given to each klystron and the adjustment value of the cavity resonator of each klystron are memorized for multiple frequencies used, so that readjustment is not necessary when the frequency used changes. It is an object of the present invention to provide a power amplification device for use in a power amplification system.

[Features of the invention]

The present invention includes a circuit that selects a plurality of operating frequencies, and under the control of this circuit, adjusts amounts of the phase shifter, attenuator, and klystron cavity resonator at each operating frequency are stored and reproduced. It is characterized by being configured as follows.

[Explanation based on examples]

The present invention will now be described in detail with reference to the accompanying drawings.

This talistron power amplification device uses two klystrons, gives the same signal to the two klystrons, and combines their outputs to obtain one output with high power. It is necessary that two klystrons output signals with the same phase and preferably the same power and combine them. When the output signals of the two klystrons have different phases, the output power is the arithmetic sum of the two klystrons. do not become.

In the figure, a signal input from an input terminal 1 is distributed by a distributor 2, and one signal is input to a phase shifter 3, subjected to phase adjustment, and output to a klystron 4. The other signal is input to the attenuator 5, subjected to attenuation adjustment, and output to the klystron 6. The signals amplified by the klystrons 4 and 6 are combined by a combiner 7 and output to one output terminal 8.

Here, the feature of the present invention lies in the portion surrounded by a dashed line in the figure. That is, the phase shifter 3 includes a phase shift amount storage circuit 9 that stores a phase shift amount setting value for each frequency used, and a phase shift amount setting circuit 10 that sets a phase shift f in accordance with the value of the readout output. regulated by signals from.

The attenuator 5 is adjusted by signals from an attenuation storage circuit 11 that stores an attenuation setting value for each frequency used, and an attenuation setting circuit 12 that sets an attenuation amount in accordance with the read output value. be done.

Further, the cavity resonators of the klystrons 4 and 6 have a cavity resonator setting value storage circuit 1 that stores cavity resonator setting values.
3 and 15 and signals from adjustment circuits 14 and 16 which adjust the cavity resonators of the klystrons 4 and 6 corresponding to the values of their readout outputs.

Further, the signal from the frequency selection circuit 17 is outputted to each of the memory circuits 9, 11, 13 and 15, so that the adjustment amount for each set frequency is read out. To explain the operation of this circuit, compensation values for the phase shift amount and attenuation amount obtained by adjusting in advance at a plurality of operating frequencies are stored in the phase shift amount storage circuit 9 and the attenuation amount storage circuit 12, respectively. moreover,
Tuning positions of the cavity resonators of the klystrons 4 and 6 obtained by adjusting in advance at a plurality of operating frequencies are stored in the cavity resonator setting value storage circuits 13 and 15.

When changing the operating frequency, the frequency selection circuit 17 stores the phase shift amount, attenuation amount, and tuning at any frequency in the phase shift amount storage circuit 9, attenuation amount storage circuit 11, and cavity resonator setting value storage circuits 13 and 15. Simultaneously control whether position compensation is required.

Phase shift amount storage circuit 9 controlled by frequency selection circuit 17
outputs to the phase shift amount setting circuit 10 a compensation value for the phase shift amount at the selected frequency among the stored phase shift amounts. In response to this, the phase shifter 3 provides the required amount of phase shift to the high frequency signal.

The attenuation amount storage circuit 11 controlled by the frequency selection circuit 17 outputs to the attenuation phase setting circuit 12 the compensation value of the attenuator at the frequency that was not selected among the attenuation amounts held therein. In response to this, five attenuators apply the required amount of attenuation to the high frequency signal.

Similarly, the cavity resonator set value storage circuits 13 and 15 controlled by the frequency selection circuit 17 output the tuning position # at the selected frequency to the cavity 1j14 resonator training circuits 14 and 16, and receive it. to adjust the cavity resonators of klystrons 4 and 6.

〔Effect of the invention〕

As described above, according to the present invention, when changing the operating frequency, the amount of phase shift and attenuation necessary for efficiently adding power and the amount of phase shift and the amount of attenuation required for efficiently adding power by operating only the frequency selection circuit 17 and the cavity resonator of the klystron can be changed. The settings will be made automatically.

Therefore, the required output power and frequency amplitude characteristics can be obtained with simple operations and without readjustment.

[Brief explanation of drawings]

The figure is a block diagram of an embodiment of the present invention. 1...Input terminal, 2...Distributor, 3...Phase shifter,
4゜6...klystron, 5...attenuator, 7...
・Interchanger, 8-output terminal, 9...phase shift amount storage circuit, l
o... Phase shift amount setting circuit, 11... Attenuation amount storage circuit,
12... Attenuation amount setting circuit, 13, 15... Cavity resonator setting value storage circuit, 14°16... Cavity resonator adjustment circuit, 17... Frequency selection circuit. Patent applicant: NEC Corporation Representative Patent attorney: Naotaka Ide

Claims (1)

[Claims] (1) A divider that distributes an input high-frequency signal into a plurality of signals, a plurality of klystrons each receiving the multiple outputs of this divider, and a synthesizer that combines the output signals of the multiple klystrons into one output high-frequency signal. and a phase shifter inserted in the signal path of one klystron so that the phases of the output signals of each klystron are approximately equal at the input of the synthesizer, the klystron power amplification device comprising: a phase memory circuit that stores a plurality of set values; a phase setting circuit that sets a phase shift amount of the phase shifter in accordance with a value of a readout output of the memory circuit; and a cavity resonator setting of the klystron. A cavity resonator setting value storage circuit that stores values for a plurality of values; A talistron power amplification device comprising an adjustment circuit that adjusts a body resonator and a frequency selection circuit that provides a signal.