Low power, high speed multi-channel chip-to-chip interface using dielectric waveguide
View Patent ↗An exemplary embodiment of the present invention provides an improved dielectric waveguide named electrical fiber. The electrical fiber with a metal cladding may isolate the interference of the signals in other wireless channels and adjacent electrical fibers, which typically causes band-limitation problem, for a smaller radiation loss and better signal guiding to lower the total transceiver power consumption as the transmit distance increases. Also, the electrical fiber may have frequency independent attenuation characteristics to enable high data rate transfer with little or even without any additional receiver-side compensation due to vertical coupling of the electrical fiber and an interconnection device.
1. A board-to-board interconnection device with an electrical fiber, the interconnection device comprising:
an electrical fiber to propagate a signal from a transmitter side board to a receiver side board with a metal cladding;
a microstrip circuit to contact with the electrical fiber with a microstrip-to-waveguide transition (MWT),
a microstrip feeding line to feed the signal to the microstrip circuit at a first layer;
a slotted ground plane including a slot to minimize a ratio of backward propagation wave to forward propagation wave at a second layer;
a ground plane including an array of vias to make an electrical connection between the slotted ground plane and the ground plane at a third layer; and
a patch to radiate the signal at a resonance frequency.
2. The interconnection device of claim 1 , wherein at least one of both ends of the electrical fiber is tapered for impedance matching between the electrical fiber and the microstrip circuit on the interconnection device.
3. The interconnection device of claim 1 , wherein at least one of both ends of the electrical fiber is shaped linearly to optimize an impedance of the electrical fiber with a largest power transfer efficiency.
4. The interconnection device of claim 1 , wherein the metal cladding comprises copper cladding.
5. The interconnection device of claim 1 , wherein the interconnection device further comprises,
a board-to-fiber connector to connect the electrical fiber to at least one of the transmitter side board and the receiver side board vertically.
6. The interconnection device of claim 1 , wherein a proportionality of a length of the metal cladding on a length of the electrical fiber is designed based on a length of the electrical fiber.