Transmitting-receiving switch-over device complete with semiconductors

A transmitting-receiving switch over circuit arrangement comprising:

• (a) a circuit junction point (P),
• (b) a transmitter output (TX) for providing a radio frequency transmitter output signal,
• (c) a transmitting first circuit section connecting said transmitter output (TX) to said circuit junction point (P) for transmitting said radio frequency transmitter output signal to said circuit junction point (P),
• (d) an antenna output terminal (ANT) coupled to said circuit junction point (P) for transmitting said radio frequency transmitter output signal or for receiving a radio frequency receiver input signal,
• (e) a receiver input terminal (RX) for receiving said radio frequency receiver input signal,
• (f) a receiving second circuit section connecting said receiver input terminal (RX) to said circuit junction point (P) for feeding said radio frequency receiver input signal to said receiver input terminal (RX),
• (g) a controllable first semiconductor radio frequency switch (D1, D4, D6) connected to said transmitting circuit section,
• (h) a first control input (VC1) connected to said first semiconductor radio frequency switch (D1, D4, D6) for supplying a first control signal to said first semiconductor radio frequency switch (D1, D4, D6) to close or open said first semiconductor frequency switch (D1, D4, D6),
• (i) a controllable second semiconductor radio frequency switch (D2, D3, D5, D7) connected to said receiving circuit section, and
• (j) a second control input (VC2) connected to said second semiconductor radio frequency switch (D2, D3, D5, D7) for supplying a second control signal to said second semiconductor radio frequency switch (D2, D3, D5, D7) for controlling said second semiconductor radio frequency switch to assume any one of three stages:
• open for blocking said receiver input signal, closed for passing said receiver input signal, and attenuated for damping said receiver input signal, whereby at least said second controllable semiconductor radio frequency switch (D2, D3, D5, D7) is controllable independently of any control of said first semiconductor radio frequency switch (D1, D4, D6).