Monolithic microwave integrated circuit transceiver

• US 20040235426A1
• Filed: 05/20/2003
• Published: 11/25/2004
• Est. Priority Date: 05/20/2003
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Pozgay, Jerome H., McCarroll, Christopher P.
• Granted Patent: US 7,079,815 B2
• Time in Patent Office: Days
• US Class Current: 455/73
• CPC Class Codes: H04B 1/48 in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter H04B1/46 takes precedence

Abstract

A transceiver having a transmit/receive switch. The transmit/receive switch includes: a common port adapted for coupling to an antenna element; a transmit port; a receive port and a matched port. The transceiver includes a second switch. The second switch has: a common port adapted for coupling to an input/output port through a gain/phase control unit; a transmit port; a receive port and a matched port. The transceiver includes a balanced amplifier. The balanced amplifier includes a pair of input ports. A first one of the pair of input ports is coupled to receive port of the transmit/receive switch, and a second one of the pair of input ports is coupled to the transmit port of the second switch. The balanced amplifier includes a pair of output ports. A first one of the pair of output ports is coupled to the transmit port of the transmit/receive switch and a second one of the pair of ports is coupled to the receive port of the second switch.

Claims

1. A transceiver, comprising:

(a) a first transmit/receive switch, such switch having;

(i) a common port adapted for coupling to an antenna element;

(ii) a transmit port;

(iii) a receive port; and

(iv) a matched load port;

(b) a second transmit/receive switch, such second transmit/receive switch having a common port adapted for coupling to an input/output port;

a transmit port;

a receive port; and

a matched load port; and

(c) a balanced amplifier having;

(i) a pair of input ports, a first one of the pair of input ports being coupled to receive port of the transmit/receive switch, a second one of the pair of input ports being coupled to the transmit port of the second switch; and

(ii) a pair of output ports, a first one of the pair of output ports being coupled to the transmit port of the transmit/receive switch and a second one of the pair of ports being coupled to the receive port of the second switch.

2. The transceiver recited in claim 1 including an amplifier coupled between the transmit port of the second switch and the second one of the pair of inputs of the balanced amplifier.

3. The transceiver recited in claim 1 including an amplifier coupled between the receive port of the transmit/receive switch and the first one of the pair of inputs of the balanced amplifier.

4. The transceiver recited in claim 1 wherein the transmit/receive switch comprises:

four sets of switchable transmission sections, each one of the sections being coupled between a different pair of the ports of the transmit/receive switch, one of such pair of ports being the common port and the receive port, another one of the pair of ports being the common port and the transmit port, another one of the pair of ports being the transmit port and the fourth port; and

a last one of the pair of ports being the fourth port and the receive port.

5. The transceiver recited in claim 4 wherein each one of the switchable transmission sections comprises:

(a) a pair of serially connected nλ

/4 transmission lines, where λ

is the nominal operating wavelength of the transceiver, and n is a odd integer, such pair of transmission lines being connected together at a junction; and

(b) a transistor having a pair of electrodes and a control electrode, the pair of electrodes being connected between the junction and ground and the control electrode being adapted for coupling to a control signal source, such transistor being configured to connect the junction to ground during one state of the control signal and to provide a substantially open circuit being the junction and ground in response to a second state of the control signal.

6. The transceiver recited in claim 5 including a gain/phase control unit coupled between the common port of the second switch and the input/output port, and wherein such gain/phase control unit includes a phase shifter.

7. The transceiver recited in claim 6 including a gain/phase control unit coupled between the common port of the second switch and the input/output port, and wherein such gain/phase control unit includes an attenuator.