Same-aperture any-frequency simultaneous transmit and receive communication system

An any-RF-frequency simultaneously transmit and receive (STAR) system, the STAR system comprising:

• a) a first and second radiating element;
• b) a first transmit signal path and a first receive signal path electrically coupled to the first radiating element, the first transmit signal path configured to pass a first any-RF-frequency transmit signal having an unspecified RF transmit frequency to the first radiating element and the first receive signal path configured to pass an any-RF-frequency receive signal having an
• unspecified RF receive frequency from the first radiating element;
• c) a second transmit signal path electrically coupled to the second radiating element, the second transmit signal path configured to pass a second any-RF-frequency transmit signal having an unspecified RF transmit frequency to the second radiating element;
• b) a signal differencing device having a first input electrically coupled to the first transmit signal path and a second input electrically coupled to the first receive signal path, the first signal differencing device subtracting a
• portion of the first any-RF-frequency transmit signal having the unspecified RF transmit frequency in the first receive signal path, thereby providing a copy of the any-RF-frequency receive signal having the unspecified RF transmit frequency at an output of the signal differencing device;
• and
• c) a signal processor having a first input electrically coupled to the output of the signal differencing device, a second input electrically coupled to the first transmit signal path and a third input electrically coupled to the second transmit signal path, the signal processor processing a copy of the first and second any-RF-frequency transmit signal having the unspecified RF transmit frequency so as to reduce a residual any-frequency transmit signal transmitted by the first and second radiating element in the first receive signal path.

A method of any-RF-frequency simultaneously transmitting and receiving, the method comprising:

• a) connecting an any-RF-frequency receive signal comprising an unspecified RF receive frequency from a port with an any-RF-frequency transmit signal comprising an unspecified RF transmit frequency from a transmit signal path so that the any-RF-frequency receive signal is passed to a receive signal path and the any-RF-frequency transmit signal is passed to the port;
• b) performing a subtraction of the any-RF-frequency transmit signal in the transmit signal path from the any-RF-frequency receive signal in the receive signal path, thereby removing a residual portion of the any-RF-frequency transmit signal from the receive signal path making a more accurate representation of the any-RF-frequency receive signal;
• and
• c) processing the more accurate representation of the any-RF-frequency receive signal so as to reduce a residual any-RF-frequency transmit signal in the any-RF-frequency receive signal path.