A waveguide interface for a waveguide having a split ring with a first half and a second half joined by a web portion. The GPS receiver further includes at least one filter which performs filtering with respect to the GPS data sequentially generated by the receiver and generates positioning data including the current position information, and a positioning data output device which selects a filter according to a selection signal and outputs the positioning data in accordance therewith. The transmitter also includes a modulator portion configured to generate at least one symbol stream and a mapping portion configured to multiplex each symbol stream to at least one transmission layer grouping. A base member 17 is disposed outside the first chip 12. The voltage generator includes a voltage amplifier which generates the synchronization pulse generally as a sinusoidal oscillation based on a reference voltage.