Slot antenna on a printed circuit board (PCB)
Embodiments herein disclose techniques for apparatuses and methods for making a slot antenna on a PCB with a cutout. A PCB may include a metal layer. The metal layer may include a cavity to be a first radiating element of an antenna, and a slot to be a second radiating element of the antenna. In addition, the cavity may extend to be the cutout of the PCB through other layers of the PCB. The first and second radiating elements may provide a determined transmission frequency for the antenna. The metal layer may further include a portion of a transmission line of the antenna, and the transmission line is in contact with the cavity and the slot. A package may be affixed to the PCB, where a portion of the package may be within the cutout of the PCB. Other embodiments may be described and/or claimed.
1. An electronic apparatus, comprising: a printed circuit board (PCB), wherein the PCB has a plurality of layers including a metal layer, wherein the PCB includes a cutout through the plurality of layers and extending into the metal layer, to form a cavity in the metal layer, wherein the metal layer includes: a first slot disposed partially around a contour of the cavity, a second slot in the metal layer, disposed partially around the contour of the cavity, to complement the disposal of the first slot around the contour of the cavity; and a transmission line formed in the metal layer, to provide electrical contact with the cavity and the first and second slots disposed around the contour of the cavity, wherein at least a portion of the transmission line, the cavity, and the first and second slots provided in the metal layer, form an antenna, wherein the first and second slots and the cavity provide a determined transmission frequency for the antenna.
2. The electronic apparatus of claim 1 , wherein the transmission line is a microstrip, a stripeline, or a coplanar waveguide transmission line.
3. The electronic apparatus of claim 1 , wherein the first slot and the second slot are of a similar shape.
4. The electronic apparatus of claim 1 , wherein the metal layer is a ground layer of the PCB.
5. The electronic apparatus of claim 1 , wherein the metal layer is a ground layer of the PCB, and comprises a bottom layer of the PCB, or next to the bottom layer of the PCB.
6. The electronic apparatus of claim 1 , further comprising:
a package affixed to the PCB, wherein a portion of the package is disposed within the cutout of the PCB.
7. The electronic apparatus of claim 6 , wherein the package comprises one of: a chip scale package (CSP), a wafer-level package (WLP), a quad-flat no-leads (QFN) package, a dual-flat no-leads (DFN) package, or a package with overmold mounted on the PCB.
8. The electronic apparatus of claim 1 , wherein the plurality of layers of the PCB further include at least two of: a ground layer, a power layer, or a signal layer.
9. The electronic apparatus of claim 1 , wherein the determined transmission frequency of the antenna is around 800 Mhz to around 10 Ghz.
10. The electronic apparatus of claim 1 , wherein the cavity comprises one of: a triangular shape, a square, a rectangular shape, a circular shape, an elliptical shape, or a polygon comprising three or more sides.
11. The electronic apparatus of claim 1 , wherein the apparatus comprises a computing device.
12. A printed circuit board (PCB), comprising: a substrate; and a metal layer on the substrate, wherein the metal layer includes: a cavity, wherein the cavity extends to be a cutout of the PCB provided through the substrate; a first slot disposed partially around a contour of the cavity, a second slot in the metal layer, disposed partially around the contour of the cavity, to complement the disposal of the first slot around the contour of the cavity; and a transmission line formed in the metal layer, to provide electrical contact with the cavity and the first and second slots disposed around the contour of the cavity, wherein at least a portion of the transmission line, the cavity, and the first and second slots provided in the metal layer, form an antenna, wherein the first and second slots and the cavity provide a determined transmission frequency for the antenna.
13. The PCB of claim 12 , wherein the transmission line is a microstrip, a stripeline, or a coplanar waveguide transmission line.
14. The PCB of claim 12 , wherein the first slot and the second slot are of a similar shape.
15. The PCB of claim 12 , wherein the metal layer is a ground layer of the PCB.
16. The PCB of claim 12 , further comprising: a ground layer, wherein the metal layer is different from the ground layer.