JPH04196623A - Feeder - Google Patents

Abstract

PURPOSE:To simplify the installation work of a feeding system, to improve the maintenability and to reduce the feeding loss by providing an electrooptic converter, an optoelectric converter to the feeder and using an optical fiber so as to feed with a signal converted into an optical signal. CONSTITUTION:A signal received by an antenna 1 is converted into an optical signal by an electrooptic converter 6 and inputted to an optical fiber 7. The optical signal fed through the optical fiber 7 is converted into an electric signal by an optoelectric converter 8 and inputted to a receiver 3. Thus, the high frequency signal is converted as it is into an optical signal and fed and subject to optoelectric conversion near the receiver 3 and supplied. Thus, since the feeder made of the optical fiber 7 is light and wired freely, the feeder wiring work is simplified, the maintenance performance is improved and the attenuation is reduced by using the optical fiber.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device in which the distance between an antenna and a receiver or transmitter is long, or in which power supply using a waveguide or the like is difficult.

[Conventional technology]

FIG. 5 shows a conventional power supply device using a waveguide.

1 is an antenna, 2 is a waveguide, 5 is a station building, 3 is a receiver, and 4 is a transmitter. In this way, waveguides have conventionally been used to feed received signals or transmitted signals.

[Problem to be solved by the invention]

For this reason, conventional power supply devices have many restrictions on the installation location of the antenna, receiver, or transmitter (and the construction is difficult).Furthermore, the signal attenuation in the waveguide is large.

[Means for solving problems]

The present invention provides an electric/optical converter near a receiving antenna to supply power using an optical fiber after converting the signal into an optical signal, or an optical/electrical converter near a transmitting antenna to supply power to an optical signal after converting it into an optical signal. The feature is that power is supplied using an optical fiber using a signal converted into .

[For production]

In the power feeding device of the present invention, power is supplied by converting a high frequency signal directly into an optical signal, and the power is supplied by an optical/electrical converter near the receiver, so the power feeding line is lighter than power feeding using a waveguide. Moreover, it can be drawn freely, making power supply work easier.
Maintainability is also improved.

Furthermore, since optical fibers are used, attenuation is also small. In this way, with the present invention, which has low power supply loss and easy power supply,
It also becomes easier to install antennas for diversity reception. Further, according to the present invention, power can be easily supplied even if the antenna and the receiver or transmitter are not located in the same station building.

〔Example〕

FIG. 1 is a block diagram of a first embodiment of the invention as claimed in claim (1). A signal received by the antenna 1 is converted into an optical signal by an electrical/optical converter 6 and is supplied with power. optical fiber 7
The optical signal supplied with power is converted into an electrical signal by an optical/electrical converter 8 and input to the receiver 3.

FIG. 3 is a block diagram of a second embodiment of the invention as claimed in claim (1). This embodiment is an example in which the present invention is applied to a spatial diversity receiver for the purpose of preventing fading. A signal received by the antenna 1-1 is converted into an optical signal by an electrical/optical converter 9-1. Also, antenna 1-
The signal received at 2 is converted into an optical signal by an electrical/optical converter 9-2.

The optical signal fed through the optical fiber 7-1.7-2 is converted into an electrical signal by the optical/electrical converters 10-1 and 10-2, and is input to the receiver 3-1.3-2.

The signals converted into intermediate frequencies by the receiver are combined by a diversity combiner 11 and then demodulated by a demodulator 12.

The above configuration has the effect that the antenna for diversity reception can be easily installed at a position where it can be used sufficiently.

FIG. 2 is a block diagram of the first embodiment of the invention as set forth in claim (2). The signal modulated by the modulator 14 is converted into a high frequency signal to be transmitted by the transmitter 4.

The signal is converted into an optical signal by an optical/electrical converter 8 and fed by an optical fiber 7 to the vicinity of the antenna.

Near the antenna, the above-mentioned optical signal is converted into an electrical signal by an electrical/optical converter 9 and radiated from the antenna l.

FIG. 4 is a block diagram of a second embodiment of the invention as claimed in claim (2). The signal modulated by the modulator 14 is converted into a high frequency signal to be transmitted by the transmitter 4.

The signal is converted into an optical signal by an optical/electrical converter 8 and fed by an optical fiber 7 close to the antenna.

Near the antenna, the above-mentioned optical signal is converted into an electric signal by an electric/optical converter 9, amplified by an amplifier 16, and then radiated from the antenna 31.

The configuration described above has the advantage of being able to supply large amounts of power to the antenna.

〔Effect of the invention〕

As explained above, according to the present invention, power supply can be carried out using optical fibers that are lightweight, have low loss, and have flexible routing, making it possible to simplify construction of the power supply system, improve maintainability, and reduce power supply losses. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a first embodiment of the invention as set forth in claim (1). FIG. 2 is a block diagram of the first embodiment of the invention as set forth in claim (2). FIG. 3 is a block diagram of a second embodiment of the invention as claimed in claim (1). FIG. 4 is a block diagram of a second embodiment of the invention as claimed in claim (2). FIG. 5 is a block diagram of a transmitting/receiving device using a conventional power feeding device. 1, 1-1.12...Aerial line. 2... Waveguide. 3, 3-1.3-2...Receiver. 4...Transmitter. 5... Bureau. 6, 6-1.6-2... Electric/optical converter. 7, 7-1.7-2... optical fiber. 8, 8-1.8-2... Optical/electrical converter. 11...Diversity synthesizer. 12... Demodulator. 13... Demodulated signal. 14...Modulator. 15...Modulation signal. 16...Amplifier. □ Ward 1

Claims (2)

[Claims] (1) At a relay station or terminal station that performs communication using radio frequency signals, a receiving antenna that receives the transmission signal, an electrical/optical converter that receives the output of the receiving antenna and converts it into an optical signal, and the electrical/optical converter that receives the output of the receiving antenna and converts it into an optical signal. A power supply device comprising: an optical fiber that receives an output from an optical converter and transmits it; and an optical/electrical converter that receives the output of the optical fiber as an input and converts it into an electrical signal. (2) At a relay station or terminal station that communicates using radio frequency signals, an electrical/optical converter takes the transmitter output as input and converts it into an optical signal, and the electrical/optical converter output is input and transmitted. 1. A power feeding device comprising: an optical fiber; an optical/electrical converter that inputs the output of the optical fiber and converts it into an electrical signal; and a transmitting antenna that transmits the output of the optical/electrical converter.