ES2211335A1 - Radio or optical signal transmitting device has opto-electric converter that inputs optical signal and outputs radio frequency signal, where outputted signal is sent to radio frequency combiner-distributor - Google Patents

Abstract

The radio or optical signal transmitting device has an opto-electric converter (2) that inputs an optical signal (S-1) and outputs a radio frequency (RF) signal (S-2), where the outputted signal is sent to a RF combiner-distributor (3). The RF combiner-distributor has a RF input-injection for the combiner function, and a RF output-extraction for the distributor function. The RF input-injection and the RF output-extraction are derived or added to the RF signal, where the resultant signal is applied to an electro-optical converter (5).

Description

Signal transmission device Radio / optics

In signal transmission systems that combine radio frequency (RF) signals with signals Optics requires a minimum use of cable fibers optical, for its rental cost, the use of elements, by example, lasers below a certain power since in otherwise its cost is disproportionate, and that the signal to be transmitted just lose a minimum of transmission quality.

Especially in cascade systems, the These requirements are exacerbated since the deficiencies of Each station accumulates in the waterfall.

The applicant has developed a device that in a simple, efficient and economical way solves the problems mentioned, in particular the signal transmission device Radio / optics is characterized because it consists of:

a) an opto-electric converter which has an optical signal as input and as output a first R.F. that is sent to

b) a combiner-distributor of R.F. which has an entry-injection of R.F. for the combiner function and / or an output-extraction from R.F. for the distributor function, deriving part of the first R.F. for exit-extraction and / or adding the input-injection signal at the first signal R.F., applying the resulting R.F. to

c) an electro-optical converter.

To better understand the purpose of this invention, a preferred form of practical realization, susceptible to accessory changes that do not distort its foundation.

Figure 1 is a block diagram of a practical embodiment of the device object of the invention.

An example of practical, non-limiting embodiment of the present invention.

An optical signal is sent (S1) via, for example, from a fiber optic cable (1) to a converter optical-electrical (2) that transforms the optical signal in a first radio frequency electrical signal R.F. (S_ {2}).

The optical-electric converter (2) can be a photodiode of the Epitaxx signature model ETX 75 FJ.

There is also a combiner-distributor (3) that can be a directional coupler, a resistive distributor combiner, a inductive distributor combiner, a duplexer, a diplexer, a Wilkinson bridge, etc., for example from the firm Mini-Circuits model ADP-2-20, but basically with two functions: the derivation function and / or the sum function.

The first signal (S_ {2}) of R.F. coming from converter (2) is injected into the combiner-distributor (3) that has:

a) for the derivation function, of an output by what derives said first signal (S2) in a signal extraction-output (S_ {3}) of R.F. that normally it is a part of the first input signal (S_ {2}), and

b) for the sum function, of an entry by the which supports a second signal (S_ {4}) injection-entry of R.F. which is added to the first  signal (S_ {2}) of R.F. and originate the output signal (S_ {5}) of R.F. of the combiner-distributor (3), that is S_ {5} = S_ {2} + S_ {4}.

The device object of the invention may be located in a specific physical post associated with an antenna of R.F. (4) in which case the output-output signal (S_ {3}) is directed to said antenna (4) and the signal injection-inlet (S_ {4}) comes from said antenna (4).

The processing of R.F. may include Any conventional operation such as amplification, filtering, regenerated, etc. which are not explained by conventional and clarity of exposition.

The signal (S_ {5}) of R.F. out of combiner-distributor (3) is sent to a electric-optical converter (5), for example a laser that sends its optical output signal (S_ {6}) to the fiber optic cable (1) for his transport.

Claims (1)

1. Radio / optical signal transmission device, characterized in that it consists of: a) an opto-electric converter which has an optical signal as input and as output a first R.F. that is sent to b) a combiner-distributor of R.F. which has an entry-injection of R.F. for the combiner function and / or an output-extraction from R.F. for the distributor function, deriving part of the first R.F. for exit-extraction and / or adding the input-injection signal at the first signal R.F., applying the resulting R.F. to c) an electro-optical converter.