Staggered rows of antennas for dual frequency operation
Apparatus and methods for antenna arrays with staggered rows of antennas for dual frequency operation are provided. In certain embodiments, a mobile device includes a front-end system including a plurality of radio frequency signal conditioning circuits, an antenna array that includes a plurality of antenna elements including a first row of antenna elements and a second row of antenna elements that are staggered, a plurality of switches coupled between the plurality of radio frequency signal conditioning circuits and the antenna array, and a control circuit configured to control a selection of the plurality of antenna elements by the plurality of switches.
1. A mobile device comprising:
a front-end system including a plurality of radio frequency signal conditioning circuits;
an antenna array that includes a plurality of antenna elements including a first row of antenna elements and a second row of antenna elements that are staggered;
a plurality of switches coupled between the plurality of radio frequency signal conditioning circuits and the antenna array; and
a control circuit configured to control a selection of the plurality of antenna elements by the plurality of switches, the control circuit operable in a plurality of modes each associated with a different selection of the plurality of antenna elements by the plurality of switches, the plurality of modes including a first mode associated with a first selection of the plurality of antenna elements along a row of the antenna array and a second mode associated with a second selection of the plurality of antenna elements along a diagonal of the antenna array, the first selection and the second selection sharing a common antenna element.
2. The mobile device of claim 1 wherein the antenna array operates with a first carrier frequency in the first mode and with a second carrier frequency in the second mode.
3. The mobile device of claim 2 wherein the first carrier frequency is a first frequency band in fifth generation frequency range two, and the second carrier frequency is a second frequency band in fifth generation frequency range two.
4. The mobile device of claim 1 wherein the first row of antenna elements corresponds to a first row of patch antennas, and the second row of antenna elements corresponds to a second row of patch antennas offset from the first row of patch antennas.
5. The mobile device of claim 1 wherein a number of the plurality of radio frequency signal conditioning circuits is less than a number of the plurality of antenna elements.
6. The mobile device of claim 1 wherein the plurality of radio frequency signal conditioning circuits include a plurality of power amplifiers each configured to provide a radio frequency transmit signal to a corresponding antenna element in the selection of the plurality of antenna elements.
7. The mobile device of claim 1 wherein the plurality of radio frequency signal conditioning circuits include a plurality of low noise amplifiers each configured to receive a radio frequency receive signal from a corresponding antenna element in the selection of the plurality of antenna elements.
8. The mobile device of claim 1 wherein the plurality of radio frequency signal conditioning circuits are operable to provide gain and phase adjustments to a plurality of radio frequency signals to control beamforming on the antenna array.
9. The mobile device of claim 1 wherein the first row of antenna elements and the second row of antenna elements each include at least three antenna elements.
10. The mobile device of claim 1 wherein the plurality of antenna elements correspond to a plurality of rectangular patch antenna elements.
11. A method of antenna communication in a mobile device, the method comprising:
conditioning a plurality of radio frequency signals using a plurality of radio frequency signal conditioning circuits of a front-end system;
coupling the plurality of radio frequency signal conditioning circuits to an antenna array using a plurality of switches, the antenna array including a plurality of antenna elements including a first row of antenna elements and a second row of antenna elements that are staggered;
controlling a selection of the plurality of antenna elements by the plurality of switches using a control circuit; and
operating the control circuit in a selected mode chosen from a plurality of modes each associated with a different selection of the plurality of antenna elements by the plurality of switches, the plurality of modes including a first mode associated with a first selection of the plurality of antenna elements along a row of the antenna array and a second mode associated with a second selection of the plurality of antenna elements along a diagonal of the antenna array, the first selection and the second selection sharing a common antenna element.
12. The method of claim 11 wherein the antenna array operates with a first carrier frequency in the first mode and with a second carrier frequency in the second mode.
13. The method of claim 12 wherein the first carrier frequency is a first frequency band in fifth generation frequency range two, and the second carrier frequency is a second frequency band in fifth generation frequency range two.
14. The method of claim 11 wherein the first row of antenna elements corresponds to a first row of patch antennas, and the second row of antenna elements corresponds to a second row of patch antennas offset from the first row of patch antennas.
15. The method of claim 11 wherein a number of the plurality of radio frequency signal conditioning circuits is less than a number of the plurality of antenna elements.
16. The method of claim 11 wherein the plurality of radio frequency signal conditioning circuits include a plurality of power amplifiers, the method further comprising using each of the plurality of power amplifiers to provide a radio frequency transmit signal to a corresponding antenna element in the selection of the plurality of antenna elements.
17. The method of claim 11 wherein the plurality of radio frequency signal conditioning circuits include a plurality of low noise amplifiers, the method further comprising using each of the plurality of low noise amplifiers to receive a radio frequency receive signal from a corresponding antenna element in the selection of the plurality of antenna elements.
18. The method of claim 11 further comprising providing gain and phase adjustments to a plurality of radio frequency signals to control beamforming on the antenna array using the plurality of radio frequency signal conditioning circuits.
19. The method of claim 11 wherein the first row of antenna elements and the second row of antenna elements each include at least three antenna elements.
20. The method of claim 11 wherein the plurality of antenna elements correspond to a plurality of rectangular patch antenna elements.