Aperiodic phased array antenna with single bit phase shifters
An antenna array can include multiple radiating cells, each comprising a radiating element and a phase shifter. Further, each radiating element can comprise a first radiating element port and a second radiating element port. Each of the radiating cells can be configured to selectively connect the phase shifter to one of the radiating element ports. Each of the radiating cells can further comprise a phase delay difference between the signal paths associated with the radiating element ports. Further, the radiating cells can have physical polarization orientations that can be different from at least one other radiating cell.
1. An antenna array comprising:
a plurality of radiating cells to produce a beam having a particular orientation of a linearly polarized field, the plurality of radiating cells comprising:
a first radiating cell to selectively generate one of a first pair of phase states of the linearly polarized field, the first radiating cell comprising a first single-bit phase shifter selectively coupled to one of first and second element ports of a first dual linear polarized radiating element via a first switch, and having a first phase delay difference between signal paths associated with the first and second element ports; and
a second radiating cell to selectively generate one of a second pair of phase states of the linearly polarized field, wherein the second pair of phase states is different than the first pair of phase states, the second radiating cell comprising a second single-bit phase shifter selectively coupled to one of third and fourth element ports of a second dual linear polarized radiating element via a second switch, and having a second phase delay difference between signal paths associated with the third and fourth element ports.
2. The antenna array of claim 1 , wherein the first radiating cell is rotated relative to the second radiating cell.
3. The antenna array of claim 1 , wherein the first dual linear polarized radiating element has a first physical polarization orientation, and the second dual linear polarized radiating element has a second physical polarization orientation different than the first physical polarization orientation.
4. The antenna array of claim 1 , wherein:
the first element port of the first dual linear polarized radiating element corresponds to a first polarization;
the second element port of the first dual linear polarized radiating element corresponds to a second polarization;
the third element port of the second dual linear polarized radiating element corresponds to a third polarization; and
the fourth element port of the second dual linear polarized radiating element corresponds to a fourth polarization.
5. The antenna array of claim 4 , wherein each of the first, second, third and fourth polarizations is a different polarization.
6. The antenna array of claim 4 , wherein:
the first and third polarizations are the same; and
the second and fourth polarizations are the same and different than the first and third polarizations.
7. The antenna array of claim 1 , wherein:
the first phase delay difference is due to a phase delay associated with the first element port that is greater than a phase delay associated with the second element port; and
the second phase delay difference is due to a phase delay associated with the fourth element port that is greater than a phase delay associated with the third element port.
8. The antenna array of claim 7 , wherein:
the first radiating cell further comprises a first phase delay element coupled to the first element port; and
the second radiating cell further comprises a second phase delay element coupled to the fourth element port.
9. The antenna array of claim 1 , wherein the first and second sets of phase states eliminate a duplicated beam.
10. The antenna array of claim 1 , further comprising at least one controller to provide commands to the single-bit phase shifter and the switch of each of the first and second radiating cells.
11. The antenna array of claim 10 , wherein the provided commands scan a beam of signals communicated with the plurality of radiating cells to a particular scan angle.
12. The antenna array of claim 11 , wherein the provided commands further rotate polarization of the beam to a particular polarization angle.