The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2013
Filed:
Mar. 07, 2011
Heon Soo Choi, Gwangmyeong, KR;
Chang Su Choi, Yongin, KR;
Hyung Jun Jeon, Hwaseong, KR;
Yeong Chan Kim, Seoul, KR;
Jae Hwan Im, Gwangmyeong, KR;
Jin Kuk Hong, Hwaseong, KR;
Heon soo Choi, Gwangmyeong, KR;
Chang su Choi, Yongin, KR;
Hyung jun Jeon, Hwaseong, KR;
Yeong chan Kim, Seoul, KR;
Jae hwan Im, Gwangmyeong, KR;
Jin Kuk Hong, Hwaseong, KR;
LS Industrial Systems Co., Ltd., Anyang-Si, Gyeonggi-Do, KR;
Abstract
An vector modulator using a time delay and a phase shifter is disclosed, the vector modulator including a time delay () varying a phase of an input signal by time-delaying the input signal; a first coupler () 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 () 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 () 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 () coupling phase-variable I/Q channel signals and outputting the coupled signals.