JPS6313403A - Transmitter - Google Patents

Abstract

PURPOSE:To attain compact and inexpensive transmitter without lowering the transmission output by using an exciting amplifier, a beam selector switch and a lotman lens in common so as to excite many element antenna groups. CONSTITUTION:The exciting amplifier 6, the beam selection switch 4 and the lotman lens 3 are used in common, distributer groups 8a-8n are connected to the output terminal of the lens 3 and the distributer output is outputted to element antenna groups 1a-1n, 1A-1N via an amplifier 2 capable of ON/ OFF control. Thus, a prescribed phase difference is given to the input signal via the amplifier 6, the beam selection switch 4 and the lens 4, the signal provided with the phase difference is distributed by the distributer group and the signal is controlled and outputted to the required element antenna groups 1a-1n, 1A-1N. Thus, many element antenna groups send a signal by using the same excitation circuit without lowering the transmission output.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmitting device that excites a group of multiple element antennas.

[Conventional technology]

Figure 2 shows, for example, the magazine ``Electronic Warfare Defense Electronics''.
ic Warfare Defense Electr
onics) J's May 1978 issue [The 5LQ-3
2 Story (TheSLQ-325tory)
FIG. 2 is a block diagram showing the configuration of a conventional transmitting antenna system that excites a group of element antennas shown in FIG.
~20n, 20A~2ON4 amplifier, 3a, 3b are Rosotoman lenses (array phasing lenses), 4
a.

4b is a beam selection switch, 5 is a beam control circuit, 6 is an excitation amplifier, 7 is a changeover switch, and 9 is a transmitter.

Next, the operation will be explained. The input signal designated as the output element antenna group by the changeover switch 7 is sent to the excitation amplifier 6a.
(or enter 6b). Excitation amplifier 6a (or 6
The signal input in b) is amplified and enters the beam selection switch 4a (or 4b). Beam selection switch 4a
(or 4b), the input signal is the Rodman lens 3a (or 4b) selected by the command of the beam switching control circuit 5.
Alternatively, it is output to the input terminal 3b).

Next, the Rodman lens 3a (or 3b) outputs a signal with a phase difference corresponding to the selected input terminal to the amplifiers 20a to 20n (or 20A to 2ON). The output signals are amplified by amplifiers 20a to 20n (or 20A to 2ON), and then sent to element antenna groups 1a to I.
It is emitted from n (or IA~IN). The radiated signals are synthesized in space so as to have directivity in a direction corresponding to the phase difference created by the Rodman lens 3a (or 3b).

[Problem that the invention seeks to solve]

Since the conventional transmitter for exciting the element antenna group is configured as described above, in order to excite the m element antenna groups, the amplifier 20. Rotman lens 3. Beam selection switch 4. There was a problem in that m excitation amplifiers 6 were each required, and the device had to be large-scale and expensive.

This invention was made to solve the above-mentioned problems, and its purpose is to provide a transmitting device that can transmit data from a large number of element antenna groups using the same excitation circuit without reducing the transmitting output. do.

[Means for solving problems]

The transmitting device according to the present invention uses an excitation amplifier, a beam selection switch, and a Rodman lens in common, and also connects a group of distributors to the output end of the Rotman lens, and connects the output of the distributor via an amplifier that can control on/off. It is designed so that it is output to a group of element antennas.

[Effect]

In this invention, a required phase difference is given to an input signal by an excitation amplifier, a beam selection switch, and a Rotman lens, and a signal obtained by distributing this phase difference signal by a group of distributors is used to control the on/off of the amplifier. Since the signal is output to the required element antenna group, the excitation amplifier, beam selection switch, and Rotman lens can be used in common for a plurality of element antenna groups without reducing the transmission output.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a transmitting device according to an embodiment of the present invention, and in the figure, 1a-in, IA-IN are element antennas, 2a-2
2A to 2N are amplifiers that can be turned on/off; 3 is a Rodman lens; 4 is a beam selection switch; 40 is a beam directing direction specifying means consisting of the Rotman lens 3 and selection switch 4; 5 is a beam control circuit; 6 is the excitation amplifier,
8a to 8n are distributors, and 9 is a transmitter.

Next, the operation will be explained. First, the excitation amplifier 6 amplifies the input signal and outputs it to the beam selection switch 4. The beam selection switch 4 outputs the input signal to the input terminal of the Rotman lens 3 selected by the command from the beam control circuit 5. The Rotman lens 3 outputs a signal with a phase difference corresponding to the selected input terminal to the distributors 8a to 8n.

The signals divided into two by the dividers 8a to 8n are sent to the amplifiers 2a to 2.
n or 2A to 2N. Amplifiers 2a-2n
Alternatively, only the signals output to the amplifiers 2A to 2N (or 2A to 2N) that are turned on by the beam control circuit 5 are amplified, and the signals output to the element antenna groups 1a to 2N (or IA to 2N) are amplified. ~IN) and are synthesized so as to have directivity in a direction corresponding to the phase difference created by the spatial telerodman lens 3. On the contrary, the amplifiers 2a to 2n are turned off by the beam control circuit 5.
(or 2A to 2N) is neither amplified nor output, so no radio waves are radiated from the element annular groups 1a to 1a (or IA to IN).

This device has exactly the same function as the one in Figure 2 in the sense that it is a selected element antenna group and has directivity in the direction corresponding to the phase difference created by the Rodman lens. .

In the above embodiment, the case of two element antenna groups has been explained, but if the distributor 8 is an m-group divider, the present invention can also be applied to the case of m element antenna groups, and the same as in the above embodiment can be applied. It has the effect of

Further, the Rotman lens 3 and the beam selection switch 4 may be replaced with digital phase shifters, and the same effect as in the above embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the transmitter according to the present invention, the excitation amplifier, the beam selection switch, and the Rodman lens are used in common to excite a large number of element antenna groups, so that the transmission output is not reduced. This has the effect of being compact and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a transmitting antenna system using a transmitting apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a transmitting antenna system using a conventional transmitting apparatus. In the figure, 1 is an element antenna, 2 is an amplifier that can be turned on/off, 3 is a Rodman lens, 4 is a beam selection switch, 40 is a beam direction specifying means, 5 is a beam control circuit, 6 is an excitation amplifier, and 7 is an excitation amplifier. Changeover switch, 8 is a distributor,
9 is a transmitting device. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (4)

[Claims] (1) In a multi-beam array antenna system, a beam pointing direction specifying means for specifying a beam pointing direction, a distributor group for distributing the output of the beam pointing direction specifying means to a plurality of element antenna groups, A transmitting device comprising: an amplifier that is provided between the distributor group and the plurality of element antenna groups and can be turned on/off to amplify the output of the distributor group. (2) The amplifier is provided for each element antenna, and each amplifier is controlled to be turned on/off so that only the required element antenna group becomes the output element antenna group. Transmitting device as described in Section. (3) The transmitting device according to claim 1 or 2, wherein the beam pointing direction specifying means comprises a beam selection switch and a Rodman lens. (4) The transmitting device according to claim 1 or 2, wherein the beam pointing direction specifying means comprises a digital phase shifter.