Electronic devices having distributed millimeter wave antennas
An electronic device may be provided with wireless circuitry for conveying radio-frequency signals greater than 10 GHz. The wireless circuitry may include a phased antenna array that transmits a steerable signal beam and independent antennas that are separate from the array. The array may be coupled to a first transceiver and the independent antennas may be coupled to a second transceiver. Power amplifier stages may be coupled between the second transceiver and the independent antennas to boost the gain of the independent antennas. If desired, the array and the independent antennas may be coupled to ports of the same transceiver. In this arrangement, each independent antenna may include an antenna feed that is coupled to a respective pair of ports on the transceiver. This may serve to boost the gain of the independent antennas without power amplifier circuitry. The independent antennas may have smaller footprints than the phased antenna array.
1. An electronic device comprising:
a baseband processor configured to generate data;
a first transceiver coupled to the baseband processor over a first path and configured to generate first radio-frequency signals greater than 10 GHz based on the data;
a second transceiver coupled to the baseband processor over a second path that is separate from the first path, the second transceiver being configured to generate second radio-frequency signals greater than 10 GHz based on the data, wherein the second transceiver has first and second output ports;
a phased antenna array coupled to the first transceiver and configured to transmit the first radio-frequency signals over a steerable signal beam; and
an antenna coupled to the second transceiver and configured to transmit the second radio-frequency signals, wherein the antenna has an antenna feed coupled to both the first and second output ports.
2. The electronic device defined in claim 1 , wherein the antenna is not part of any phased antenna array.
3. The electronic device defined in claim 1 , further comprising:
a housing having opposing first and second faces;
a display having a display cover layer mounted at the first face; and
a dielectric layer mounted at the second face, wherein the phased antenna array is mounted within the housing and configured to transmit the first radio-frequency signals through the dielectric layer, and the antenna is mounted within the housing and configured to transmit the second radio-frequency signals through the display cover layer.
4. The electronic device defined in claim 3 , wherein the housing comprises peripheral conductive housing structures that surround a periphery of the electronic device, and the display comprises an active area configured to emit light through the display cover layer and an inactive area interposed between the active area and the peripheral conductive housing structures, the antenna being aligned with the inactive area of the display.
5. The electronic device defined in claim 3 , further comprising:
a power amplifier coupled to the second transceiver and configured to amplify the second radio-frequency signals; and
an additional antenna coupled to the power amplifier, wherein the additional antenna is configured to transmit the second radio-frequency signals amplified by the power amplifier through the display cover layer.
6. The electronic device defined in claim 1 , wherein the antenna is separate from the phased antenna array and is configured to transmit the second radio-frequency signals separately from the steerable signal beam.
7. The electronic device defined in claim 1 , wherein the electronic device has a first side and a second side opposite to the first side, the antenna is mounted at the first side of the electronic device, and the phased antenna array is mounted at the second side of the electronic device.
8. The electronic device defined in claim 1 , wherein the electronic device comprises a greater number of power amplifiers coupled between the second transceiver and the antenna than between the first transceiver and any one of the antennas in the phased antenna array.
9. The electronic device defined in claim 1 , further comprising:
a power amplifier and a phase and magnitude controller each coupled between the second transceiver and the antenna, wherein the phase and magnitude controller is separate from the power amplifier, and the second transceiver is configured to transmit the second radio-frequency signals over the steerable signal beam.
10. The electronic device defined in claim 1 , wherein the first transceiver is formed on a first integrated circuit and the second transceiver is formed on a second integrated circuit that is separate from the first integrated circuit.
11. An electronic device having opposing first and second faces, the electronic device comprising:
peripheral conductive housing structures surrounding a periphery of the electronic device;
a display comprising a display cover layer mounted to the peripheral conductive housing structures at the first face of the electronic device, an active area configured to emit light through the display cover layer, and an inactive area interposed between the active area and the peripheral conductive housing structures;
a dielectric layer at the rear face of the electronic device;
an integrated circuit having a radio-frequency transceiver with a first output port, a second output port, and a set of output ports that are separate from the first and second output ports;
a phased antenna array coupled to the set of output ports and configured to transmit a steerable beam of first radio-frequency signals greater than 10 GHz through the dielectric layer; and
an antenna aligned with the inactive area and having an antenna feed coupled to both the first and second output ports, wherein the antenna feed is configured to receive second radio-frequency signals greater than 10 GHz from the first and second output ports and the antenna is configured to transmit the second radio-frequency signals through the display cover layer.