Frequency and polarization reconfigurable antenna systems
Apparatus and methods for reconfigurable antenna systems are provided herein. In certain configurations, an antenna system includes an antenna element, a tuning conductor adjacent to and spaced apart from the antenna element, and a switch electrically connected between the tuning conductor and a reference voltage, such as ground. The tuning conductor is operable to load the antenna element, and the switch selectively connects the tuning conductor to the reference voltage to provide tuning to the antenna element.
1. A radio frequency module comprising:
a module substrate;
an antenna array formed on the module substrate and including a first patch antenna and a second patch antenna;
a first tuning conductor positioned between the first patch antenna and the second patch antenna; and
a semiconductor die attached to the module substrate and including a first transistor switch operable to control an electrical potential of the first tuning conductor to provide tuning to the antenna array.
2. The radio frequency module of claim 1 wherein the first patch antenna includes a signal feed and a ground feed, the semiconductor die further including a ground transistor switch electrically connected between the ground feed and a ground voltage.
3. The radio frequency module of claim 2 wherein the first patch antenna further includes a patch antenna element configured to radiate a radio wave, the signal feed capacitively coupled to the patch antenna element.
4. The radio frequency module of claim 3 wherein the patch antenna element further includes a slot configured to provide input impedance matching to the signal feed.
5. The radio frequency module of claim 1 wherein the first transistor switch is electrically connected between the first tuning conductor and a ground voltage.
6. The radio frequency module of claim 1 further comprising a second tuning conductor positioned on a side of the second patch antenna opposite the first tuning conductor, the semiconductor die further including a second transistor switch operable to control an electrical potential of the second tuning conductor.
7. The radio frequency module of claim 6 wherein the antenna array further includes a third patch antenna, the second tuning conductor positioned between the second patch antenna and the third patch antenna.
8. The radio frequency module of claim 1 wherein a state of the first transistor switch is operable to control a bandwidth of the antenna array.
9. The radio frequency module of claim 1 wherein a state of the first transistor switch is operable to control a direction of polarization of the antenna array.
10. The radio frequency module of claim 1 wherein the antenna array is configured to operate in a frequency range of 20 gigahertz to 100 gigahertz.
11. The radio frequency module of claim 1 wherein the first patch antenna and the second patch antenna each has an octagonal shape.
12. The radio frequency module of claim 1 wherein the antenna array is formed on a first side of the module substrate, and the semiconductor die is formed on a second side of the module substrate opposite the first side.
13. A mobile device:
a transceiver configured to generate a plurality of radio frequency transmit signals and to receive a plurality of radio frequency receive signals; and
a front end system including a radio frequency module coupled to the transceiver, the radio frequency module including a module substrate, an antenna array formed on the module substrate and including a first patch antenna and a second patch antenna, a first tuning conductor positioned between the first patch antenna and the second patch antenna, and a semiconductor die attached to the module substrate and including a first transistor switch operable to control an electrical potential of the first tuning conductor to provide tuning to the antenna array.
14. The mobile device of claim 13 wherein the first patch antenna includes a signal feed and a ground feed, the semiconductor die further including a ground transistor switch electrically connected between the ground feed and a ground voltage.
15. The mobile device of claim 13 further comprising a second tuning conductor positioned on a side of the second patch antenna opposite the first tuning conductor, the semiconductor die further including a second transistor switch operable to control an electrical potential of the second tuning conductor.
16. A front end system comprising:
a plurality of power amplifiers; and
a radio frequency module configured to receive a plurality of radio frequency signals from the plurality of power amplifiers, the radio frequency module including a module substrate, an antenna array formed on the module substrate and including a first patch antenna and a second patch antenna, a first tuning conductor positioned between the first patch antenna and the second patch antenna, and a semiconductor die attached to the module substrate and including a first transistor switch operable to control an electrical potential of the first tuning conductor to provide tuning to the antenna array.
17. The front end system of claim 16 further comprising a plurality of phase shifters each connected to a corresponding one of the plurality of power amplifiers.
18. The front end system of claim 16 wherein the first patch antenna includes a signal feed and a ground feed, the semiconductor die further including a ground transistor switch electrically connected between the ground feed and a ground voltage.
19. The front end system of claim 16 wherein the first transistor switch is electrically connected between the first tuning conductor and a ground voltage.
20. The front end system of claim 16 further comprising a second tuning conductor positioned on a side of the second patch antenna opposite the first tuning conductor, the semiconductor die further including a second transistor switch operable to control an electrical potential of the second tuning conductor.