Apparatus for improving transmitter-receiver isolation

A communication device, comprising:

• a transmitter;
• a receiver;
• and
• an antenna, the antenna including:
• a first antenna element;
• a second antenna element;
• a splitter having an input, a first output, and a second output, the input being coupled to the transmitter, the first output being coupled to the first antenna element, the second output being coupled to the second antenna element, the splitter being configured to adjust at least one of a gain and phase imbalance between the first antenna element and the second antenna element, the first antenna element being configured to radiate a first adjusted version of a first signal generated by the transmitter, and the second antenna element being configured to radiate a second adjusted version of the first signal generated by the transmitter;
• at least one third antenna element coupled to at least one first reactive load, the at least one third antenna element being configured to radiate a second signal modified in accordance with the at least one first reactive load, the second signal being induced at the at least one third antenna element by the first adjusted version of the first signal and the second adjusted version of the first signal, and the at least one first reactive load being configured to modify the second signal to destructively cancel a third signal induced at a fourth antenna element by the first adjusted version of the first signal and the second adjusted version of the first signal;
• and
• the fourth antenna element operatively coupled to the receiver and being configured to receive signals.

An antenna, comprising:

• a first antenna element configured to radiate a first signal;
• a second antenna element configured to receive signals;
• and
• at least one third antenna element coupled to at least one first reactive load, the at least one third antenna element being configured to radiate a second signal modified in accordance with the at least one first reactive load, the second signal being induced at the at least one third antenna element by the first signal, the at least one first reactive load comprising at least one of an inductive load, a capacitive load, or a combination of inductive and capacitive loads, and the at least one first reactive load being configured to modify the second signal by a reactance value of the at least one first reactive load to destructively cancel a third signal induced at the second antenna element by the first signal.