Radio frequency isolation structure
Aspects of the present disclosure relate to a packaged module with a radio frequency isolation structure that includes a racetrack, a conductive layer, and a conductive feature in an electrical path between the racetrack and the conductive layer. The racetrack can be disposed in a substrate and configured at a ground potential. The racetrack can include a break.
1. A packaged module comprising:
a substrate having a major surface;
a radio frequency component coupled to the major surface of the substrate; and
a radio frequency isolation structure including a racetrack in the substrate, a conductive layer positioned such that the radio frequency component is located between the conductive layer and the major surface of the substrate, and a conductive feature in an electrical path between the racetrack and the conductive layer, the racetrack configured at a ground potential and disposed around the radio frequency component, and the racetrack having a break.
2. The packaged module of claim 1 wherein the radio frequency component includes a power amplifier.
3. The packaged module of claim 1 wherein the break in the racetrack is disposed in an area of the packaged module that is associated with a minimum radiation around a perimeter of the packaged module.
4. The packaged module of claim 1 wherein the radio frequency isolation structure further includes a via in an electrical path between the racetrack and the conductive feature, and the via is physically disposed between the racetrack and the conductive feature.
5. The packaged module of claim 1 wherein the break is located in a low radiating area that is associated with less electromagnetic radiation than other portions of the racetrack.
6. The packaged module of claim 5 further comprising a via in the substrate, the conductive feature being a wire bond in contact with a wire bond pad, and the via being in an electrical path between the racetrack and the wire bond pad.
7. The packaged module of claim 1 wherein the break is located in a low radiating area of the packaged module, and the radio frequency component is configured to emit less electromagnetic radiation to the low radiating area of the packaged module than to other areas of the packaged module.
8. The packaged module of claim 1 wherein the break is located in a low radiating area of the packaged module, and the low radiating area has a lower activity factor relative to other areas of the packaged module.
9. The packaged module of claim 1 further comprising a second racetrack in the substrate, the second racetrack being in the electrical path between the racetrack and the conductive layer.
10. The packaged module of claim 1 wherein the racetrack has at least one narrowed section.
11. The packaged module of claim 1 wherein the radio frequency component includes a high band portion and a low band portion.
12. The packaged module of claim 1 wherein the radio frequency component includes at least one of a voltage-controlled oscillator, a filter, or a switch.
13. The packaged module of claim 1 wherein the radio frequency isolation structure further includes a second racetrack positioned between the racetrack and the conductive feature, the racetrack being electrically connected to the conductive feature by way of the second racetrack.
14. A wireless device comprising:
an antenna configured to facilitate at least one of transmitting or receiving a radio frequency signal;
a packaged module including a substrate having a major surface; a radio frequency component coupled to the major surface of the substrate, the radio frequency component in communication with the antenna; and a radio frequency isolation structure including a racetrack in the substrate, a conductive layer positioned such that the radio frequency component is located between the conductive layer and the major surface of the substrate, and a conductive feature in an electrical path between the racetrack and the conductive layer, the racetrack configured at a ground potential and disposed around the radio frequency component, and the racetrack having a break; and
an other electronic module in communication with the packaged module.
15. The wireless device of claim 14 wherein the break is disposed in a low radiating area of the packaged module.
16. The wireless device of claim 15 wherein the radio frequency component is configured to emit less electromagnetic radiation to the low radiating area of the packaged module than to other areas of the packaged module.
17. The wireless device of claim 15 wherein the packaged module is configured to receive less electromagnetic radiation at the low radiating area of the packaged module from the other electronic module than at other areas of the packaged module.
18. The wireless device of claim 14 wherein the break is located in a low radiating area that is associated with less electromagnetic radiation than other portions of the racetrack.
19. The packaged module of claim 18 further comprising a via in the substrate, the conductive feature being a wire bond in contact with a wire bond pad, and the via being in an electrical path between the racetrack and the wire bond pad.
20. The wireless device of claim 14 wherein the radio frequency component includes a power amplifier.
21. The wireless device of claim 14 wherein the packaged module further includes a via in the substrate, the via being in the electrical path between the racetrack and the conductive layer.