A computing device (100, 200, 300, 400, 700, 800, 810, 820, 830), comprising: a first computing device portion (102, 202, 304, 404) including one or more electrical components (107, 211), a first side, a second side, and a first metal frame (224, 322, 422) having a first through-slot (110, 210, 310, 410, 802, 812, 822, 832); a second computing device portion (104, 204, 302, 304) including one or more other electrical components (111, 207), a third side, a fourth side and a second metal frame (222, 324, 424) having a second through-slot (114, 214, 314, 414, 804, 814, 824, 834); and a mechanical joint (106, 346, 446) configured to connect the first computing device portion (102, 202, 304, 404) and the second computing device portion (104, 204, 302, 402), the first side being positioned to face the third side, wherein the first computing device portion (102, 202, 304, 404) further includes an electromagnetic coil (221, 421, 748, 806, 816, 826, 836) configured to overlap both the first through-slot (110, 210, 310, 410, 802, 812, 822, 832) and the second through-slot (114, 214, 314, 414, 804, 814, 824, 834) along an axis (120, 220) running orthogonal to the first computing device portion (102, 202, 304, 404) and the second computing device portion (104, 204, 302, 402); and wherein the computing device further comprises: an electromagnetic coil interface circuitry connected to the electromagnetic coil; one or more processor units within one or both of the first computing device portion and the second computing device portion; an adjustable matching circuitry coupled to the electromagnetic coil interface circuitry and configured to match impedance of the electromagnetic coil to the electromagnetic coil interface circuitry; a configuration detection circuitry configured to detect a physical configuration of the computing device, the physical configuration being dependent upon a position of the mechanical joint (106, 346, 446); and a matching selector circuitry coupled to the adjustable matching circuitry and the configuration detection circuitry, the matching selector circuitry being configured to adjust the adjustable matching circuitry based on the detected physical configuration. a first computing device portion (102, 202, 304, 404) including one or more electrical components (107, 211), a first side, a second side, and a first metal frame (224, 322, 422) having a first through-slot (110, 210, 310, 410, 802, 812, 822, 832); a second computing device portion (104, 204, 302, 304) including one or more other electrical components (111, 207), a third side, a fourth side and a second metal frame (222, 324, 424) having a second through-slot (114, 214, 314, 414, 804, 814, 824, 834); and a mechanical joint (106, 346, 446) configured to connect the first computing device portion (102, 202, 304, 404) and the second computing device portion (104, 204, 302, 402), the first side being positioned to face the third side, wherein the first computing device portion (102, 202, 304, 404) further includes an electromagnetic coil (221, 421, 748, 806, 816, 826, 836) configured to overlap both the first through-slot (110, 210, 310, 410, 802, 812, 822, 832) and the second through-slot (114, 214, 314, 414, 804, 814, 824, 834) along an axis (120, 220) running orthogonal to the first computing device portion (102, 202, 304, 404) and the second computing device portion (104, 204, 302, 402); and wherein the computing device further comprises: an electromagnetic coil interface circuitry connected to the electromagnetic coil; one or more processor units within one or both of the first computing device portion and the second computing device portion; an adjustable matching circuitry coupled to the electromagnetic coil interface circuitry and configured to match impedance of the electromagnetic coil to the electromagnetic coil interface circuitry; a configuration detection circuitry configured to detect a physical configuration of the computing device, the physical configuration being dependent upon a position of the mechanical joint (106, 346, 446); and a matching selector circuitry coupled to the adjustable matching circuitry and the configuration detection circuitry, the matching selector circuitry being configured to adjust the adjustable matching circuitry based on the detected physical configuration. an electromagnetic coil interface circuitry connected to the electromagnetic coil; one or more processor units within one or both of the first computing device portion and the second computing device portion; an adjustable matching circuitry coupled to the electromagnetic coil interface circuitry and configured to match impedance of the electromagnetic coil to the electromagnetic coil interface circuitry; a configuration detection circuitry configured to detect a physical configuration of the computing device, the physical configuration being dependent upon a position of the mechanical joint (106, 346, 446); and a matching selector circuitry coupled to the adjustable matching circuitry and the configuration detection circuitry, the matching selector circuitry being configured to adjust the adjustable matching circuitry based on the detected physical configuration.