A facility for transmitting/receiving (1, 1') microwave radio signals including: - a transmitting/receiving unit including: ∘ means able to receive electrical signals, called terrestrial electrical signals, coming from a transformation of radio signals received by terrestrial radio relay channel; ∘ means for ▪ transforming electrical signals modulated according to a spread spectrum protocol, called satellite electrical signals, into microwave radio signals able to be transmitted by satellite and ▪ transmitting to a satellite said microwave radio signals obtained after transforming said satellite electrical signals; ∘ means for amplifying said satellite electrical signals; - a casing including a modulator of electrical signals according to a spread spectrum protocol for obtaining satellite electrical signals; - a coaxial cable connecting the transmitting/receiving unit and the casing able to: ∘ convey said terrestrial electrical signals from said transmitting/receiving unit to said casing; ∘ convey the satellite electrical signals coming from said modulator from said casing to said transmitting/receiving unit; the transmitting/receiving facility (1, 1') being further characterised in that said satellite electrical signals are modulated in a transmission frequency band which is the S-band or C-band. - a transmitting/receiving unit including: ∘ means able to receive electrical signals, called terrestrial electrical signals, coming from a transformation of radio signals received by terrestrial radio relay channel; ∘ means for ▪ transforming electrical signals modulated according to a spread spectrum protocol, called satellite electrical signals, into microwave radio signals able to be transmitted by satellite and ▪ transmitting to a satellite said microwave radio signals obtained after transforming said satellite electrical signals; ∘ means for amplifying said satellite electrical signals; ∘ means able to receive electrical signals, called terrestrial electrical signals, coming from a transformation of radio signals received by terrestrial radio relay channel; ∘ means for ▪ transforming electrical signals modulated according to a spread spectrum protocol, called satellite electrical signals, into microwave radio signals able to be transmitted by satellite and ▪ transmitting to a satellite said microwave radio signals obtained after transforming said satellite electrical signals; ▪ transforming electrical signals modulated according to a spread spectrum protocol, called satellite electrical signals, into microwave radio signals able to be transmitted by satellite and ▪ transmitting to a satellite said microwave radio signals obtained after transforming said satellite electrical signals; ∘ means for amplifying said satellite electrical signals; - a casing including a modulator of electrical signals according to a spread spectrum protocol for obtaining satellite electrical signals; - a coaxial cable connecting the transmitting/receiving unit and the casing able to: ∘ convey said terrestrial electrical signals from said transmitting/receiving unit to said casing; ∘ convey the satellite electrical signals coming from said modulator from said casing to said transmitting/receiving unit; ∘ convey said terrestrial electrical signals from said transmitting/receiving unit to said casing; ∘ convey the satellite electrical signals coming from said modulator from said casing to said transmitting/receiving unit;