Abstract: There is provided a high bar assembly attachable to a door frame, the assembly comprising: first and second door frame attachments secured to a door frame, wherein first and second door frame attachments are secured to first and second opposite inner side walls of the door frame respectively; first and second retainers protruding inwardly from the first and second door frame attachments in a monolithic or integrated manner therewith respectively; first and second bar supports retained or supported by the first and second retainers, wherein each bar support has a retainer groove in a first end thereof, wherein each retainer is slidably and removably fitted with each retainer groove in a horizontal direction, wherein each bar support is secured to each door frame attachment, wherein the second end of each support bar protrudes horizontally beyond the door frame by a predetermined distance; and an elongate bar passing through the second ends of the first and second bar supports.

Abstract: Disclosed is a vector modulator. The vector modulator can control the amplitude and phase of an input signal, by not using amplitude variable attenuators but using phase shifters. Further, the vector modulator has a simple configuration and enables an input signal to be exactly modulated. Furthermore, the vector modulator can modulate the phase of an input signal throughout all areas in the polar coordinate system.

Abstract: An vector modulator using a time delay and a phase shifter is disclosed, the vector modulator including a time delay (110) varying a phase of an input signal by time-delaying the input signal; a first coupler (120) converting the signal outputted in changed phase through the time delay to an I channel signal and a Q channel signal each having a 90° phase difference and outputting the I/Q channel signals; a first phase shifter (130) varying the phase of the I channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable I channel signal; a second phase shifter (140) varying the Q channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable Q channel signal; and a second coupler (150) coupling phase-variable I/Q channel signals and outputting the coupled signals.

Abstract: Disclosed is a vector modulator. The vector modulator can control the amplitude and phase of an input signal, by not using amplitude variable attenuators but using phase shifters. Further, the vector modulator has a simple configuration and enables an input signal to be exactly modulated. Furthermore, the vector modulator can modulate the phase of an input signal throughout all areas in the polar coordinate system.

Abstract: An vector modulator using a time delay and a phase shifter is disclosed, the vector modulator including a time delay (110) varying a phase of an input signal by time-delaying the input signal; a first coupler (120) converting the signal outputted in changed phase through the time delay to an I channel signal and a Q channel signal each having a 90° phase difference and outputting the I/Q channel signals; a first phase shifter (130) varying the phase of the I channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable I channel signal; a second phase shifter (140) varying the Q channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable Q channel signal; and a second coupler (150) coupling phase-variable I/Q channel signals and outputting the coupled signals.

Abstract: Disclosed is a remote control apparatus using an RFID, capable of controlling an object equipment on the basis of control information according to a user input, including a transmitter that includes a plurality of RFID tags that sends control information, to control the object equipment, selected by the user input, and a receiver that includes an RFID reader to receive the control information from the RFID tags and transfers the control information to the object equipment. There are advantages that a problem caused by using a battery in a remote controller can be solved, and a structure of the remote controller becomes simple since a function related with control information input can be mounted internally in or externally on the object equipment.

Abstract: A radio frequency identification (RFID) reader includes an antenna unit and a signal processing unit. The antenna unit splits an input RF signal into a plurality of signals and respectively transmit the split signals through a plurality of antennae by setting the amplitudes or phases of the split signals to be different from one another. The signal processing unit is connected to the antenna unit through one transmission line, and transmits an RF signal to which a DC signal is added to the antenna unit. Accordingly, the amplitude and phase of the RF signal are set variable, so that it is possible to extend the identification range by dynamically controlling an antenna radiation pattern of the RFID reader and to stably communicate with the tag by decreasing the error rate of reception data.