Abstract: An apparatus includes: first to N?1-th correlation-calculation units correlation-calculating a signal at a position corresponding to an n-th reference cell of a reference symbol in a received symbol and a signal at a position corresponding to an n+1-th reference cell of the reference symbol in the received symbol; a first calculation unit multiplying a result of phase correlation calculation of the n-th reference cell and the n+1-th reference cell by the calculation result of the correlation-calculation units and thereafter, summing up all of the multiplication results to calculate a first sum total; a second calculation unit multiplying a result of phase correlation calculation of an N?n?2-th reference cell and an N?n?1-th reference cell by the calculation result of the correlation-calculation units and summing up all of the multiplying results to calculate a second sum total; and a decider detecting a larger value between the first and the second sum total.

Abstract: A patch antenna having a single patch fed with multiple signals is provided. The patch antenna includes: a first patch; a first feeder and a second feeder which are connected to the first patch; and a second patch which is parallel to the first patch. Accordingly, since multiple signals can be fed into a single patch, a MIMO antenna can be embodied by using a patch antenna which has high isolation between feeders without increasing its size.

Abstract: A motor includes: a first slot and a second slot in which a first current having the same phase flows, the first slot including a first coil end portion in which a current flows in a first direction and a second coil end portion in which a current flows in the opposite direction of the first direction, and the second slot including a third coil end portion in which a current flows in the second direction and a fourth coil end portion in which a current flows in the first direction, a stator forming a fixed magnetic field by the first current, and a rotor forming a rotating field and rotated according to an interaction with the fixed magnetic field formed by the stator.

Abstract: A DC block is provided. The present DC block includes a first microstrip line of which one end is connected to a first signal line and of which the other end is bent; and a second microstrip line of which one end is connected to a second signal line, and of which the other end is bent, wherein the second microstrip line is placed parallel to the first microstrip line. Accordingly, the size of the DC block is reduced by at least half.

Abstract: An inverter apparatus having a power supply circuit includes a converter circuit for rectifying AC power into DC power, a smoothening circuit for smoothening the rectified DC power, an inverter circuit for converting the smoothened DC into AC at a variable frequency through a plurality of switches to control a load, and a current detection circuit for detecting overcurrent from the smoothened DC supplied from the inverter circuit, wherein the inverter circuit applies bootstrap power for driving the switches to the current detection circuit to use the bootstrap power as power of the current detection circuit. When bootstrap power for driving switch gates is used, it is possible to use the bootstrap power as the power of the current detection circuit by adding the auxiliary circuit composed of a small number of passive elements.

Abstract: A band pass filter is provided. The band pass filter includes a first resonator which includes a first pattern and first microstrip line; a second resonator which includes a second pattern and second microstrip line; a third pattern vertically arranged between the first pattern and second pattern; and a ground pattern connected with the third pattern, embodying a band pass filter using a resonator having a length of 1/16 wavelength or less, instead of a resonator having a length of ¼ wavelength.

Abstract: A down-frequency conversion circuit and up-frequency conversion circuit, and a receiver and transmitter applying the same are provided. The down-frequency conversion circuit includes a harmonic mixer and general mixer, and thus becomes able to convert frequency using one LO (Local Oscillator) frequency, thereby reducing burden on generating LO frequency.