Yong Heui Cho

datasheet antenna microwave test substrate 전자회로 설계 op-amp smartphone 강의계획서 rf diode electromagnetics power divider transmission line 증폭기 system communication transistor dipole antenna impedance matching wireless system reflectarray paper bluetooth dac regulator voltage regulator fet field effect transistor bipolar junction transistor bjt semiconductor electromagnetic wave power combiner hardware smith chart waveguide resonator filter specifications zigbee power amp 미래 스마트폰 트랜지스터 tr 필터 주파수 이득 저주파 감쇄기 저항 iphone 4s electronic circuit 전파 안테나 상담 미래설계 cell phone array antenna high gain broadband antenna loop antenna electromagnetic radiation